Saarlandia(EXTINCT) (incertae sedis)
Saaromioptera(EXTINCT)
Sabalia
Sabalinae
Sabarhytus
Sabatinca
Sabatinca group
Sabatoga mirabilis(incertae sedis)
Sabellida
Sabelliphilidae
Sabera
S-aruana
S-biaga
S-caesina
S-dobboe
S-dorena
S-expansa
S-fuliginosa
S-fusca
S-iloda
S-kumpia
S-madrella
S-misola
S-tabla
Sabia
Sabitaptus(EXTINCT) (incertae sedis)
Sableta
Sacabambaspis(EXTINCT)
Saccactis australisLager 1911
Saccactis macmurrichiLager 1911
Saccactis musculosaLager 1911
Saccharococcus
Saccharomonospora
Saccharomycotina
Saccharopolyspora
Saccharothrix
Saccodomus
Saccopharyngidae
Saccopharyngiformessackpharynx fishes
Saccopsidae
Sacculinidae
Sacopsocus
S-quadricornis
Sacosternum
Sacrator
S-polites
S-sacrator
Sadwavirus
Saegerius
Sagarmatha
Sagartia
Sagartia Bradley[sic] Verrill 1869
Sagartia Carlgreni[sic] Haddon and Duerden 1896
Sagartia Sancti Matthaei[sic] Mc Murrich [sic] 1893
Sagartia acanellaeVerrill 1883
Sagartia georgianaCarlgren 1899
Sagartia gracillimaMc Murrich [sic] 1887
Sagartia gravieriPax 1912
S-herpetodesMc Murrich [sic] 1904
Sagartia igneaFischer 1875
Sagartia kerguelensisPax 1922
Sagartia lacteusMc Murrich [sic] 1893
Sagartia leucolenaVerrill 1866
Sagartia lobataCarlgren 1899
Sagartia longaVerrill 1928
Sagartia luciaeVerrill 1899
Sagartia modestaVerrill 1866
Sagartia nitidusWassilieff 1908
Sagartia nutrixStuckey 1909
Sagartia paguriVerrill 1869
Sagartia paradoxaMc Murrich [sic] 1893
Sagartia patagonicaCarlgren 1899
Sagartia plebeiaHaddon 1898
Sagartia pugnaxVerrill 1928
Sagartia pusillaVerrill 1928
Sagartia pustulataMc Murrich [sic] 1907 [sic]
Sagartia schillerianaStoliczka 1869
Sagartia sphyrodetaGosse 1858
Sagartia spongicolaVerrill 1883
Sagartia vagransStuckey 1909
Sagartianthus
S-indosinensisCarlgren 1843 [sic]
Sagartiidae
Sagartiogeton
S-abyssorumCarlgren 1942
S-antarcticusCarlgren 1928
S-ingolfiCarlgren 1928
Sagartiogeton praelongaCarlgren 1928
S-robustusCarlgren 1924
S-verrilliCarlgren 1942
Sagartiomorphe carlgreniKwietniewski 1897
Sagartiomorphidae
Sagenoptera(EXTINCT)
Saginae(Predatory katydids)
Sagitta
S-bipunctata
S-bombayensis
S-helenae
Sagittariidae(Secretary-bird)
Sagittastrea(EXTINCT)
Sagittidae
Sagola
Sagolonus
Saguinus
Saharagalago misrensis(EXTINCT)
Sahlbergiini
Sahlbergius
Saichania(EXTINCT)
Saiga tatarica(saiga)
Saimiri
Sais
S-browni
S-rosalia
Saitis
Salagosa
Salagosita
Salamandra
S-algira
S-atra
S-corsica
S-infraimmaculata
S-lanzai
S-salamandra
Salamandrella keyserlingii
Salamandrella schrenckii
Salamandridae
Salamandrina(incertae sedis)
S-perspicillata
S-terdigitata
Salamis
S-anteva
S-augustina
S-cacta
S-humbloti
S-strandi
S-temora
Salana
Salangidae
Salanoemia
S-fuscicornis
S-noemi
S-sala
S-similis
S-tavoyana
Salassa
Salatis
S-canalis
S-cebrenus
S-flavomarginatus
S-fulvius
S-salatis
S-sapucayae
S-scyrus
Salcedia
Saldidae(shore bugs)
Salebrocoleus(EXTINCT)
Salebroferus(EXTINCT)
Salegentibacter
Saletara
Salgadoia
Salganea
Saliana
S-antoninus
S-chiomara
S-covancae
S-esperi
S-fischer
S-fusta
S-hewitsoni
S-longirostris
S-mamurra
S-mathiolus
S-morsa
S-nigel
S-placens
S-saladin
S-salius
S-salona
S-salva
S-severus
S-triangularis
S-vixen
Salibacillus
Salicaceae(willow family, incl. Flacourtiaceae pro parte and Scyphostegia borneensis)
Salientia(Frogs and Toads)
Salinamexus
Salinibacter
Salinibacterium
Salinicoccus
Salinomys
Salmoniformessalmons, trouts, whitefishes, smelts
Salmonoidei
Salmoperla
Salpictomelus
Salpingidae(narrow-waisted bark beetles)
Salpingoecidae
Salpixantha coccineaHook.
Saltenia(EXTINCT)
Salterprovirus
Salticidae(jumping spiders)
Salticinae
Salticinae Division
Saltisedes
Saltugilia
S-australis
S-caruifolia
S-latimeri
S-splendens
Salutoporus
Salvadoraceae
Salvadorina waigiuensis(Salvadori's Teal)
Salviniaceae
Samarangopus
Sambucus
Samodorcas(EXTINCT)
Samotherium(EXTINCT)
Samotragus(EXTINCT)
Sampsa
Samyda
Samydaceae
Sanchezia
Sand lizards
Sandalodes(Old World)
SandalopsChun, 1906
Sandalus
Sandersiella
Sandersonella
Sandiella(EXTINCT)
Sangamona(EXTINCT)
Sanguibacter
Saniba
Saniderus
Sanitheriidae(EXTINCT)
Sanmenia
Santalaceae(including Viscaceae)
Santalales
Santanmantis axelrodi(EXTINCT) (Early Cretaceous limestone, Santana Formation, Brazil)
Santiagonius
Santschiella kohli
Sapayoa aenigma(broad-billed sapayoa)
Saphocallus
Saphoglossa
Saphoglossina
Saphophagus
Saphydrus
Sapindaceae(soapberry family, incl. Aceraceae and Hippocastanaceae)
Sapindales
Sapitia
Sapotaceae(sapodilla family)
Sapphirinidae
Saprinillus(1 species)
Saprininae
Saprinodes(2 species)
Saprinus(>150 species)
Saprospira
Sapygidae
Sapyginae
Sarangesa
S-astrigera
S-aza
S-bouvieri
S-brigida
S-dasahara
S-gaerdesi
S-haplopa
S-laelius
S-lucidella
S-lunula
S-maculata
S-majorella
S-maxima
S-motozi
S-motozioides
S-pandaensis
S-penningtoni
S-phidyle
S-princei
S-purendra
S-ruona
S-seineri
S-tertullianus
S-thecla
S-tricerata
Sarbia
S-antias
S-catomelaena
S-curitiba
S-damippe
S-oneka
S-pertyi
S-soza
S-xanthippe
Sarcandra
Sarcina
Sarcinochrysidales
Sarcobatus(greasewood)
S-baileyi
S-vermiculatus
Sarcococca
Sarcogyps
Sarcolaenaceae
Sarcoleotia
Sarcomyxa
Sarcophagidae
Sarcopterygii(lobe-finned fishes and four-legged vertebrates)
Sarcoptiformes
Sarginae
Saribia
S-decaryi
S-ochracea
S-perroti
S-tepahi
Sarinda
S-armata
S-atrata
S-camba
S-capibarae
S-cayennensis
S-cutleri
S-exilis
S-glabra
S-hentzi
S-imitans
S-longula
S-marcosi
S-nigra
S-panamae
S-pretiosa
S-ruficeps
S-silvatica
S-utingae
Sarkidiornis(Comb Duck and Knob-billed Duck)
S-melanotos(Comb Duck)
S-sylvicola(Knob-billed Duck)
Sarmientoia
S-almeidai
S-browni
S-dinka
S-eriopis
S-faustinus
S-haywardi
S-phaselis
S-similis
Saronominae
Sarota
S-acanthoides
S-acantus
S-chloropunctata
S-chocoensis
S-chrysus
S-completa
S-craspediodonta
S-estrada
S-gamelia
S-gyas
S-harveyi
S-lasciva
S-miranda
S-myrtea
S-neglecta
S-psaros
S-spicata
S-subtessellata
S-turrialbensis
S-willmotti
Sarothrias
Sarothrocrepis
Sarothruridae(Flufftails)
Sarraceniaceae(American carnivorous pitcher plants)
Sarsicopia
Sarsiellidae
Sartallus
Sarticus
Sasakia
S-charonda
S-funebris
Sassacus
S-alboguttatus
S-arcuatus
S-aurantiacus
S-barbipes
S-biaccentuatus
S-bicinctus
S-dissimilis
S-flavicinctus
S-glyphochela
S-helenicus
S-marginellus
S-ocellatus
S-papenhoei
S-poecilopus
S-resplendens
S-trochilus
S-vanduzei
Satan
Satarupa
S-formosibia
S-gopala
S-monbeigi
S-nymphalis
S-splendens
Sathytes
Satonius kurosawai
Sator
Satrapes
Satrapister(1 species)
Satta
Saturniidae(emperor moths)
Saturniinae
Saturnus
S-metonidia
S-reticulata
S-saturnus
S-steinbachi
Satyrina
Satyrinae
Satyrini
Satyrodes
S-appalachia
S-eurydice
Satyrotaygetis
Satyrus
Saulcyella
Sauria
Saurichthyiformes(EXTINCT)
Saurischia
Saurodontidae(EXTINCT)
Sauropelta(EXTINCT)
Sauroplasma
Sauropoda(EXTINCT) (Apatosaurus, Diplodocus, Brachiosaurus, and relatives)
Sauropodomorpha(EXTINCT) (long-necked plant-eating dinosaurs)
Sauropterygia(EXTINCT) (incertae sedis)
Saurosternon(EXTINCT)
Saururaceae
Saussurembia0(incertae sedis)
Saxatilitermes
Saxet
Saxifragaceae
Saxifragaceae alliance
Saxifragales
Saxipendiidae
Sbordoniola
Scabina
Scabritia
Scada
S-karschina
S-kusa
S-reckia
S-zemira
S-zibia
ScaeurgusTroschel, 1857
Scalenarthrus
Scalida
Scalidiopsis
Scalpellidae
Scandentia(tree shrews)
Scapherpetontidae(EXTINCT)0(incertae sedis)
Scaphicoma
Scaphidiinae
Scaphidiini
Scaphidister(2 species)
Scaphidium
Scaphiini
Scaphinotus
Scaphiophryne
Scaphiophryninae*
Scaphipaussus
Scaphischema
Scaphisoma
Scaphisomatini
Scaphium
Scaphobaeocera
Scaphopoda(tusk shells)
Scaphoxium
Scaphydra
S-angra
S-hintoni
S-pygmaea
Scapicoelis
Scapolister
Scaponopselaphus
Scapteromys
Scarabaeiformia(scarabs, stag beetles, dung beetles, etc.)
Scardovia
Scaridiidae
Scaridium
Scaritini
Scathophagidae
Scatopsidae
Scelembia
Sceleminiae
Scelidosaurus(EXTINCT)
Scelionidae
Sceloporus(spiny lizards)
Sceloporus group
Scelotrichus
Scenopinidae
Scepanotrocha
Scepasma(EXTINCT)
Sceptobiini
Sceptobius
Sceptuchus
S-baehri
S-simplex
Schaenicoscelis
Schatzmayrina
Schausiana trojesa
Schedolimulus
Schedoneura(EXTINCT) (incertae sedis)
Schedorhinotermes
Schendylidae(monophyly uncertain)
Scheuchzeriaceae
Schilbidae(monophyly uncertain)
Schisandra
Schisandraceae
Schismaderma
Schistacme
Schistodactylini
Schistodactylus
Schistogenia
Schistogeniina
Schistoglossa
Schistonota
Schistoperla
Schizaeaceae
Schizelythron
Schizocephala bicornis
Schizochoerus(EXTINCT)
Schizochoerus africanus(= Nesolecithus africanus)
Schizochoerus janickii(= Nesolecithus janickii)
Schizochoerus liguloideus
Schizochoerus paragonopora(= Gephyrolina paragonopora)
Schizocoryna
Schizocosa
Schizoculina
Schizocytheridae
Schizodactylidae(splay-footed crickets)
Schizogenius
S-"apicalis"
S-amphibius
S-arechavaletae
S-arechavaletae group
S-arimao
S-auripennis
S-banningeri
S-basalis
S-basalis group
S-bicolor
S-brevisetosus
S-capitalis
S-capitalis group
S-carinatus
S-carinatus group
S-cearaensis
S-chiricahuanus
S-clivinoides
S-costiceps
S-costipennis
S-crenulatus chiapatecus
S-crenulatus crenulatus
S-crenulatus group
S-darlingtoni
S-depressus
S-dilatus
S-dyschirioides
S-elongatus
S-elongatus group
S-emdeni
S-falli
S-ferrugineus
S-ferrugineus group
S-grossus
S-impressicollis
S-impuncticollis
S-interstriatus
S-jacarensis
S-janae
S-kulti
S-lindrothi
S-lineolatus
S-litigiosus
S-longipennis
S-maculatus
S-multipunctatus
S-multisetosus
S-negrei
S-neovalidus
S-ocellatus
S-ochthocephalus
S-optimus
S-optimus group
S-ozarkensis
S-pacificus
S-planulatus
S-planuloides
S-pluripunctatus
S-plurisetosus
S-putzeysi
S-pygmaeus
S-quadripunctatus
S-quinquesulcatus
S-quinquesulcatus group
S-reichardti
S-riparius
S-sallei
S-scopaeus
S-sculptilis
S-seticollis seticollis
S-seticollis vandykei
S-strigicollis
S-sulcifrons
S-suturalis
S-szekessyi
S-tenuis
S-tenuis group
S-tibialis
S-tristriatus
S-truquii
S-truquii group
Schizomida
Schizoneurata
Schizopetalidae
Schizophora
Schizophoridae(EXTINCT) (incertae sedis)
Schizophorinus punctatus(EXTINCT)
Schizophoroides(EXTINCT)
Schizophorus crassus(EXTINCT)
Schizophyllaceae
Schizopilia
Schizopodinae(incertae sedis)
Schizopteridae
Schizosaccharomycetes
Schizotaldycupes(EXTINCT)
Schlechtendalia
Schlegeliaceae
Schmidtopteron(EXTINCT)
Schoenobiinae
Schoenotenini
Schoepfia
Schoutedenella
Schrebera
Schreckensteinia(bristle-legged moths)
Schultesia
Schwartzia
Sciablatta
Sciacharis
S-(Anthicimimus)
S-(Magellanoconnus)
S-(Sciacharis)
S-(Valdivioconnus)
Sciadionopsocus
S-fenzelianae
Sciadoceridae
Sciadopityaceae
Sciaphyini(Sciaphyes)
Sciaridae
Scincoidea
Scincomorpha
Sciocharis
Sciodrepoides
Sciomyzidae
Sciomyzoidea
Scioporus
Sciotrogus
Scirtes
Scirtidae(marsh beetles)
Scirtoidea
Sciuridae(squirrels, chipmunks, marmots, and prairie dogs)
Sciurillinae(Neotropical pygmy squirrel)
Sciurinae
Sciurini(tree squirrels)
Sciuromorpha
Sciurotamias(rock squirrels)
Sciurus(non-monophyletic)
Scleractinia(monophyly uncertain)
Sclerhelia
Sclerochiton
Sclerochiton Clade
S-harveyanusNees
S-ilicifoliusMeeuse
S-triacanthusMeeuse
S-vogelii(Nees) T. Anderson
Sclerogibbidae
Scleroglossa
Scleropauropus
Sclerophasma paresisensis
Scleroptila(Ring-necked Francolin and relatives)
S-africana(Grey-winged Francolin)
S-finschi(Finsch's Francolin)
S-levaillantii(Red-winged Francolin)
S-levaillantoides(Orange River Francolin)
S-psilolaema(Moorland Francolin)
S-shelleyi(Shelley's Francolin)
S-streptophora(Ring-necked Francolin)
Scobicia
Scobura
S-cephala
S-cephaloides
S-coniata
S-eximia
S-isota
S-phiditia
S-tytleri
S-woollettii
Scolanthus callimorphaGosse 1853
Scolebythidae
Scolecida
Scolecithricidae
Scoliidae
Scoliinae
Scoliogmus
Scoliopsis
Scolodera pardalotus
Scolomys(spiny mice)
Scolopacidae(sandpipers)
Scolopendrella
Scolopendrellidae
Scolopendrelloides
Scolopendrellopsis
Scolopendrinae
Scolopendromorpha
Scoloplacidae
Scolopocryptopinae
Scopaeina
Scopaeodes
Scopaeomerus
Scopaeus
S-(Asiascopaeus)
S-(Hyperscopaeus)
S-(Scopaeodera)
S-(Scopaeoma)
S-(Scopaeopsis)
S-(Scopaeus)
S-(Typhloscopaeus)
Scopalio
Scopariinae
Scopelengys
Scopelomorphalanternfishes
Scopidae(Hammerhead)
Scopobium
Scopocira
S-atypica
S-carinata
S-dentichelis
S-fuscimana
S-histrio
S-melanops
S-panamena
S-sexspinosa
S-tenella
S-vivida
Scopoliella
Scoptanura
Scopticus
Scopuridae
Scorpaeniformes(scorpionfishes, sculpins, and relatives)
Scorpio
Scorpiones
Scorpionida(scorpions and their extinct relatives)
Scorpionidae
Scorpionoidea
Scorpiops (Alloscorpiops)
Scorpiops (Euscorpiops)
Scorpiops (Neoscorpiops)
Scorpiops (Scorpiops)
Scorpiopsidae
Scotiophryne(EXTINCT)
Scotobleps
Scotocryptini
Scotocryptodes
Scotocryptus
S-(Scotocryptopsis)
S-(Scotocryptus)
Scotodes
Scotodonia
Scotonomus
Scotopelia(Fishing Owls)
S-bouvieri(Vermiculated Fishing Owl)
S-peli(Pel's Fishing Owl)
S-ussheri(Rufous Fishing Owl)
Scotoplectus
Scotticus
Scottomyzontidae
Scraptiidae(false flower beetles)
Scrophulariaceae(figwort family)
Sculdidae(EXTINCT)
Sculptura
Scutelleridae(shield-back bugs)
Scutellosaurus(EXTINCT)
Scutellospora
Scutiger
Scutigerella
Scutigerellidae
Scybalicus(incertae sedis)
Scydmaenidae(ant-like stone beetles)
Scydmaeninae
Scydmaenini
Scydmaenoides(EXTINCT)
Scydmaenus
S-(Afroscydmaenus)
S-(Agathelor)
S-(Alaudula)
S-(Androscydmaenus)
S-(Androscydmus)
S-(Archiscydmaenus)
S-(Armatoscydmaenus)
S-(Breviclavatoscydmaenus)
S-(Choleropsis)
S-(Cholerus)
S-(Conoscydmaenus)
S-(Corbulifer)
S-(Eustemmoides)
S-(Eustemmus)
S-(Geoscydmaenus)
S-(Heteroeustemmus)
S-(Heteromicrus)
S-(Kingius)
S-(Mascarensia)
S-(Mimoscydmaenus)
S-(Nepaloscydmaenus)
S-(Paraeustemmus)
S-(Parageoscydmaenus)
S-(Parallomicrus)
S-(Parascydmaenus)
S-(Pseudeumicrus)
S-(Scottiscydmaenus)
S-(Scydmaenus)
S-(Seychellinus)
S-(Termitoscydmaenus)
S-(Trapezoscydmaenus)
Scydmoraphes
Scymbalium
Scymbalopsis
Scyphostegia borneensis
Scyphozoa
Scyrothis athleta
Scyrothis diplosamma
Scyrothis granosa
Scytalinus
Scythrididae(flower moths) (monophyly uncertain)
Scythropasus
S-elongatus
S-napoensis
S-nicaraguensis
S-olivieri
S-omodon
S-rogerii
S-seriatoporus
S-telefordi
Scytodidae(spitting spiders)
Scytoglossa
Scytohymen(EXTINCT)
Scytohymenidae
Scytonema
Scytophorus
S-striatusR. Hertwig 1882
Sea
Seadornavirus
Sealy
Sebacinales
Sebaga
Sebaldella
Sebasthetops
Sebastira
Sebastonyma
S-dolopia
S-medoensis
S-pudens
S-suthepiana
Secatophus
Secernentea
Seco
S-aphanis
S-calagutis
S-ocellata
Secostruma lethifera
Sedimentibacter
Seeverseciton
Seeversia
Seeversiella
Segestriidae
Seggeurius(EXTINCT)
Seirinae
Seison africanus
Seison annulatus
Seison nebaliae
Seisonidea
Seitzister(1 species)
Sekotyphlus
Seleneuplectus
Selenihalanaerobacter
Selenochilus
Selenomonas
Selenophanes
S-cassiope
S-josephus
S-supremus
Selenopidae
SelenoteuthisVoss, 1958
Selenozethus
Seligeriales
Selimus
Selina
Sellosaurus(EXTINCT)
Selmacryptodira
Selonomus
Semaeognathia
Semaeomyia
Semalea
S-arela
S-atrio
S-kola
S-proxima
S-pulvina
S-sextilis
Sematuridae(American swallowtail moths)
Semiclaviger
Semidelitschia(incertae sedis)
Semigordionus circumannulatus
Semionotiformes(EXTINCT) (many Mesozoic fossils)
Semipaussus
SemirossiaSteenstrup, 1887
S-equalis
S-patagonica
S-tenera
Semnoderidae
Semnodioceras(EXTINCT)
Semnolius
Semomesia
S-alyattes
S-capanea
S-croesus
S-geminus
S-macaris
S-marisa
S-nesti
S-tenella
Semora
Semperium
Sengletiola
Senoculidae
Seokia
Sepedophilus
Sephisa
S-chandra
S-daimio
S-dichroa
S-princeps
Sepia
SepiadariidaeNaef 1912
Sepiadarium auritum
Sepiadarium austrinum
Sepiadarium gracilis
Sepiadarium kochii
Sepiadarium nipponianum
Sepiella
S-cyanea
S-inermis
S-japonica
S-ocellata
S-ornata
S-weberi
SepiettaNaef, 1912
S-neglecta
S-oweniana
S-petersi
SepiidaeKeferstein. 1866
SepioideaNaef, 1916
SepiolaLeach, 1817
S-affinis
S-atlantica
S-aurantiaca
S-birostrata
S-intermedia
S-knudseni
S-ligulata
S-parva
S-pfefferi?
S-robusta
S-rondeleti
S-rossiaeformis?
S-steenstrupiana
S-trirostrata
SepiolidaKeferstein, 1866
S-eLeach 1817
SepiolinaNaef, 1912
SepiolinaeAppellof, 1898
Sepioloidea lineolata
Sepioloidea pacifica
SepioteuthisBlainville, 1824
S-australis
S-lessoniana
S-sepioidea
Sepsidae
Septastraea(EXTINCT)
Sequiviridae
Seracamaurops
Serdis
S-statius
S-venezuelae
S-viridicans
Sergestoidea
Sericinus
Sericoda
S-bembidioides
S-bogemannii
S-ceylonica
S-lissoptera
S-montana
S-obsoleta
S-quadripunctata
Sericomyrmex
S-amabilis
S-aztecus
S-beniensis
S-bondari
S-burchelli
S-diego
S-harekulli
S-impexus
S-luederwaldti
S-lutzi
S-mayri
S-moreirai
S-myersi
S-opacus
S-parvulus
S-saussurei
S-scrobifer
S-urichi
S-zacapanus
Sericostomatidae
Sericostomatoidea
Serikasomina
Sermayaceae(EXTINCT)0(incertae sedis)
Serolidae(F.)
Serpentes(incertae sedis)
Serpulidicolidae
Serpulina
Serradigitus
Serratosagitta
S-bierii
S-pacifica
S-pseudoserratodentata
S-serratodentata
S-tasmanica
Serritermes serrifer
Serritermitidae
Serrivomeridae
Serrolabis
Servaea
Sesbania
Seseria
S-affinis
S-dohertyi
S-formosana
S-sambara
S-strigata
Sesiidae(clearwing moths)
Sesioidea(clearwing moths and relatives)
Sesommata
Sespedectidae(EXTINCT)
Sessilia
Setabis
S-alcmaeon
S-buckleyi
S-cleomedes
S-cruentata
S-disparilis
S-epitus
S-extensa
S-fassli
S-flammula
S-heliodora
S-hippocrate
S-lagus
S-luceres
S-megalia
S-myrtis
S-phaedon
S-plagiaria
S-preciosa
S-pythia
S-pythioides
S-rhodinosa
S-serica
S-staudingeri
S-tapaja
S-velutina
Setalidius
S-attenuatus
S-nigerimus
Setalimorphus
Setalis
Setchellanthaceae
Setifer setosus(greater hedgehog tenrec)
Setnikia
Setodyschirius
Setopsocus
S-magnus
Setvena
Sevenia
S-amazoula
S-amulia
S-benguelae
S-boisduvali
S-consors
S-garega
S-howensis
S-madagascariensis
S-moranti
S-natalensis
S-occidentalium
S-pechueli
S-pseudotrimeni
S-silvicola
S-trimeni
S-umbrina
Severinia
S-granulata
S-lemoroi
S-mistshenkoi
S-nigrofasciata
S-obscurus
S-popovi
S-turcomaniae
S-ullrichi
Severinopsis(EXTINCT) (incertae sedis)
Seydelites
Seymouria(EXTINCT)
S-baylorensis(EXTINCT)
S-grandis(EXTINCT)
S-sanjuanensis(EXTINCT)
Seymouriamorpha(EXTINCT)
Shaanxispira(EXTINCT)
Shamosaurus(EXTINCT)
Shamuheruna
Shanshanosaurus houyanshanensis(EXTINCT) (incertae sedis)
Shapna
Shaposhnikoviidae(EXTINCT) (incertae sedis)
Sharovia(EXTINCT)
Shaverdolena
Shawella
Shelfordella
Shelfordina
Sheltoweeptera(EXTINCT)
Shepherdia(EXTINCT)
Shigatheta
Shiinoidae
Shipsa
Shirakia
Shizoneura
Shizoneurella
Shomronella(EXTINCT)
Shrew rats
Shuttleworthia
Shyrodes
Siadenovirus
Siafumimus
Siagona
Siagonini
Siagonium
Siagotanyx
Sialidae(alderflies)
Siamitini
Siamochoerus(EXTINCT)
Siamotragulus sanyathanai(EXTINCT)
Siamotyrannus isanensis(EXTINCT) (incertae sedis)
Siberiodictya(EXTINCT)
Sibiriohymen(EXTINCT)
Sibirocosa
Sibylla
S-(Sibylla)
SS-dives
SS-dolosa
SS-limbata
SS-maculosa
SS-marmorata
SS-pretiosa
S-(Sibyllopsis)
SS-griffinii
SS-operosa
SS-pannulata
SS-punctata
SS-vanderplaetseni
Sibyllidae
Sibylloblatta(incertae sedis)
Sicariidae(brown spiders, recluses)
Sicilicula
Sicilomyrmex corniger(EXTINCT)
Sicyonis
S-antarcticaCarlgren 1939
S-auroraCarlgren and Stephenson 1929
S-crassaHertwig 1882
S-hemisphaericaCarlgren 1934
S-ingolfiCarlgren 1921
S-sumatriensisCarlgren 1928
S-tuberculataCarlgren 1921
S-variabilisCarlgren 1921
Sicyopus commensalisGravier 1918
Siderone
S-galanthis
S-syntyche
Sidusa
S-angulitarsis
S-borealis
S-carinata
S-dominicana
S-femoralis
S-gratiosa
S-inconspicua
S-marmorea
S-mona
S-nigrina
S-olivacea
S-pallida
S-pavida
S-recondita
S-sp. (~arizona)
S-stoneri
S-tarsalis
S-turquinensis
S-unica
S-variegata
Sidymella
Sierolomorphidae
Sierraperla
Sierrasteroma(incertae sedis)
Sifidius
Sigalionidae
Sigalphinae
Sigiliidae
Sigillum
Sigmatoneura
Sigmella
Sigmoceros lichtensteinii(Lichtenstein's hartebeest)
Sigmodontinae(Neotropical mice and rats)
Sigmodontini(cotton rats)
Sigmodontomys
Signeta
S-flammeata
S-tymbophora
Signiphoridae
Sikhotealinia zhiltsovae
Silillicus
Siloca
Silpha(non-monophyletic)
Silpha (Ablattaria)
Silpha (Phosphuga)
Silphidae(large carrion and burying beetles)
Silphinae
Silphopsyllus
Silphotelini
Silphotelus
Silurana
Siluridae
Siluriformes
Siluroidea
Siluroidei
Silusa
S-(Silusa)
S-(Stenusa)
Silusida
Silvanidae(silvanid flat bark beetles)
Silveira
S-jordani
S-marshalli
S-occultus
S-rufus
Silvestridia
Silvisaurus(EXTINCT)
Simacauda
Simaethistis0(incertae sedis)
Simalio
Simandoa
Simaroubaceae(tree of heaven family)
Simblerastes
Simias
Simiskina
S-pasira
S-pavonica
S-pediada
S-phalena
S-phalia
S-pharyge
S-pheretia
S-philura
S-proxima
S-sibatika
Simkania
Simkinion
Simmondsia(EXTINCT)
Simmondsia chinensis(incertae sedis)
Simodontus
Simopelta
S-bicolor
S-curvata
S-jeckylli
S-laticeps
S-manni
S-minima
S-oculata
S-paeminosa
S-pergandei
S-williamsi
Simopone
S-annettae
S-bakeri
S-chapmani
S-conciliatrix
S-conradti
S-emeryi
S-fulvinodis
S-grandidieri
S-grandis
S-gressitti
S-laevissima
S-marleyi
S-matthiasi
S-oculata
S-satagia
S-schoutedeni
Simorcus
Simplexvirus
Simplicorfa
Simplimorpha
Simplocarina
Simplona
Simprulla
S-argentina
S-nigricolor
Simuliidae
Sinablatta
Sinadoxa corydalifolia
Sinaiella
S-nebulosa
S-raggei
S-sabulosa
Sinantherina
Sinapocerus(EXTINCT)
Sinapriculus(EXTINCT)
Sindora
Sinechostictus
S-(Pseudolimnaeum)
S-(Sinechostictus)
Sinentomata
Sinentomon
S-chui
S-erythranum
S-yoroi
Single-stranded DNA Viruses(non-monophyletic)
Single-stranded Negative Sense RNA Viruses(monophyly uncertain)
Single-stranded Positive Sense RNA Viruses(monophyly uncertain)
Sinningieae
Sinobathyscia
Sinobrosculus0(incertae sedis)
Sinocallipodidae
Sinocalon
Sinocapra(EXTINCT)
Sinocapritermes
Sinocaulus
Sinocupes(EXTINCT) (incertae sedis)
Sinohesione
Sinohyus(EXTINCT)
Sinolispinodes(EXTINCT)
Sinomantis denticulata
Sinomegaceros(EXTINCT)
Sinomiopteryx
S-brevifrons
S-grahami
S-guangxiensis
Sinonasutitermes
Sinonympha amoena
Sinopalaeoceros(EXTINCT)
Sinophilus
Sinoreas(EXTINCT)
Sinosilphia(EXTINCT)
Sinotragus(EXTINCT)
Sinoxylini
Sinoxylodes
Sinoxylon
Siolius
Sipaliopsis
Siparunaceae
Siphlonuridae
Siphonactinia boekiiDanielsson [sic] 1856
Siphonactinopsis
S-laevisCarlgren 1921
Siphonaptera(fleas)
Siphoniulida(incertae sedis)
Siphonocryptidae
Siphonomecus multicinctus0(incertae sedis)
Siphonophorida
S-e
Siphonorhinidae
Siphonorhis brewsteri(Least Poorwill)
Siphonosoma
Siphonostomatoida
Siphonotidae
Siphoviridae
Siproeta
S-epaphus
S-stelenes
S-superba
Sipuncula(peanut worms)
Sipunculus
Siren dunni(EXTINCT)0(incertae sedis)
Siren hesterna(EXTINCT)0(incertae sedis)
Siren intermedia
Siren lacertina
Siren miotexana(EXTINCT)0(incertae sedis)
Sirenia(manatees, dugong, sea cow)
Sirenidae
Sirenotherium(EXTINCT)
Siricidae
Sirsoe
Siseme
S-alectryo
S-aristoteles
S-atrytone
S-militaris
S-neurodes
S-pallas
S-peculiaris
S-pedias
S-pseudopallas
Sisoridae
Sisoroids
Sisyridae0(incertae sedis)
Sitaphe
Siteromina
Sitticinae
Sitticus
S-albolineatus
S-ammophilus
S-ansobicus
S-auricomus
S-avocator
S-basalis
S-cabellensis
S-canus
S-caricis
S-cautus
S-cellulanus
S-clavator
S-concolor
S-cutleri
S-damini
S-designatus
S-diductus
S-distinguendus
S-dorsatus
S-dyali
S-dzieduszycki
S-exiguus
S-fasciger
S-finschi
S-flabellatus
S-floricola
S-goricus
S-inopinabilis
S-japonicus
S-juniperi
S-karakumensis
S-leucoproctus
S-longipes
S-manni
S-mazorcanus
S-monstrabilis
S-nenilini
S-niveosignatus
S-palpalis
S-palustris
S-penicillatus
S-penicilloides
S-peninsulanus
S-phaleratus
S-pubescens
S-pulchellus
S-ranieri
S-rupicola
S-saevus
S-saganus
S-saltator
S-saxicola
S-sexsignatus
S-sinensis
S-striatus
S-sylvestris
S-talgarensis
S-tannuolana
S-tenebricus
S-terebratus
S-uber
S-uphami
S-vilis
S-walckenaeri
S-welchi
S-zimmermanni
Sittidae(nuthatches)
Sivacapra(EXTINCT)
Sivachoerus(EXTINCT)
Sivacobus(EXTINCT)
Sivadenota(EXTINCT)
Sivahyus(EXTINCT)
Sivatherium(EXTINCT)
Skatitermes
Skatitoxenini
Skermania
Skidmorella
Skwala
Slackia
Sladenia
Sliferia
Slimoniidae(EXTINCT)
Slimonioidea
Sloanoglymmiina
Slosarczykovia
Smectonia
Smerina
Smeringurus
Smerinthinae
Smetanaetha
Smicrips(palmetto beetles)
Smicrus
Smilacaceae
Smilestethus
Smilisca
Smilotrochus(EXTINCT)
Sminthuridae
Sminthurididae
Smodicinodes
Smodicinus
Smutsiinae (African pangolins)
Smynthurodes
Smyrna
S-blomfildia
S-karwinskii
Sneathia
Soalala
Sobarocephala
Sobarocephalinae
Sobemovirus
Sodalia
S-coler
S-dimassa
S-sodalis
Soehngenia
Soelteria
Soergelia(EXTINCT)
Sogaella
Sogda
Sogdianotherium(EXTINCT)
Sogdini(monophyly uncertain)
Sognorus
Solanaceae(nightshade family)
Solanales
Solenodonsaurus(EXTINCT)
Solenodontidae(solenodons)
Solenogastres(Neomeniomorpha)
Solenogenys
S-funkei
S-thomsoni
Solenoglossa
Solenopsidini(fire ants, etc.)
Solenopsis(fire ants, thief ants)
S-abdita
Solenosmilia
Solidosagitta
S-marri
S-planctonis
Solieriinae(incertae sedis)
Solifugae(wind scorpions, camel spiders, sun spiders, solpugids)
Soliperla
S-campanula
S-fenderi
S-quadrispinula
S-sierra
S-thyra
S-tilamook(incertae sedis)
Solirubrobacter
Solitaria
Solivomer
Solobacterium
Solocisquama(incertae sedis)
Solomys
Solpugidae
Solygia sulcatifrons
Somabrachyidae(Mediterranean flannel moths)
Somabrachys
Somalithespis minor
Somasterochara
Somasteroidea(EXTINCT)
Somateria(Spectacled Eider, King Eider, and Common Eider)
S-fischeri(Spectacled Eider)
S-mollissima(Common Eider)
S-spectabilis(King Eider)
Somatiidae
Somatipion
Somatipionina
Someira
Somoleptus
Sonoma
Sooglossidae
Sooglossus gardineri
Sooglossus sechellensis
Sophista
S-aristoteles
S-latifasciata
Sophoreae pro parte (Acosmium
Sophoreae pro parte A
Sophoreae pro parte B
Sophoreae pro parte C
Sophoreae sens. strict. (Sophora
Sophrochaeta
S-(Cernella)
S-(Sophrochaeta)
Sopkalia
Sorbeoconcha
Sordariomycetes
Soricidae(shrews)
Sorineuchora
Sorocaba
Sosippus
Sostrata
S-adamantinus
S-bifasciata
S-caerulans
S-cronion
S-festiva
S-grippa
S-jinna
S-pusilla
Sotanochactas
South African golden moles
South American series(non-monophyletic)
Sovia
S-albipectus
S-fangi
S-grahami
S-hyrtacus
S-lucasii
S-separata
S-subflava
Soyedina
Spadella
S-angulata
S-antarctica
S-birostrata
S-boucheri
S-bradshawi
S-cephaloptera
S-equidentata
S-gaetanoi
S-japonica
S-ledoyeri
S-moretonensis
Spadellidae
Spalacidae
Spalacinae(blind mole rats)
Spalgini
Spangleriella
Spanglerogyrus
S-albiventris
Spanioda
Spaniolinus
Sparassidae
Sparganothini
Spargotermes costalimai(EXTINCT) (Miocene-Pliocene of Brazil)
Spartaeinae
Spartaeus
Spathicephalus mirus(EXTINCT)
Spathicephalus pereger(EXTINCT)
Spathilepia
Spathosterninae
Spatulitermes
Speculanas specularis(Bronze-winged Duck)
Speculitermes
Spelaeobates
S-(Pretneriella)
S-(Spelaeobates)
Spelaeobatina
Spelaeoblatta
Spelaeobythus
Spelaeochlamys
Spelaeodromus
Spelaeogriphacea
Spelaeophryne
Spelaites
Speleobama
Speleobamini
Speleochus
Speleoithonidae
Speleonectes benjamini
Speleonectes epilimnius
Speleonectes gironensis
Speleonectes lucayensis
Speleonectes ondinae
Speleonectes tulumensis
Speleonectidae
Speleophriidae
Spelerpinae
Speluncarius
Spengelidae
Speobatrisodes
Speobaxyris
Speocharidius
S-(Kobiella)
S-(Speocharidius)
Speocharinus
Speodiaetus
S-(Ochsiella)
S-(Speodiaetus)
Speomolops
Speonemadus
Speonesiotes
S-(Albanella)
S-(Crivosiella)
S-(Kulzeria)
S-(Speonesiotes)
Speonomidius
Speonomites
Speonomus
S-(Batinoscelis)
S-(Machaeroscelis)
S-(Metaspeonomus)
S-(Speonomus)
Speophilosomatidae
Speophyes
Speoplanes
Spercheidae
Sperchontoidea
Sperchopsini
Sperchopsis
Spermatobium
Spermatopsida(seed plants: flowering plants, conifers, etc.)
Spermophilopsis
Spermophilus(groundsquirrels) (non-monophyletic)
Sperrgebietomeryx(EXTINCT)
Sphaenidatoma
Sphaenorhynchus
Sphaericosoma(1 species)
Sphaeridiinae
Sphaeridiini
Sphaeriolinus
Sphaeritidae(false clown beetles)
Sphaerius acaroides
Sphaerius africanus
Sphaerius alticola
Sphaerius coenensis
Sphaerius coomani
Sphaerius cribratus
Sphaerius favosus
Sphaerius gustavlohsei
Sphaerius hispanicus
Sphaerius humicola
Sphaerius laeviventris
Sphaerius madecassus
Sphaerius obsoletus
Sphaerius ovensensis
Sphaerius papulosus
Sphaerius perlaevis
Sphaerius politus
Sphaerius scutellaris
Sphaerius silvicola
Sphaerius spississimus
Sphaerius tesselatus
Sphaerius texanus
Sphaerius tropicus
Sphaeriusidae
Sphaerobathyscia
Sphaerobulbus
Sphaeroceridae
Sphaeroceroidea
Sphaeroderus
Sphaerodoridae
Sphaerolichida
Sphaeroliodes
Sphaeromacrops
Sphaeromantis
S-spinicollis
S-spinulosa
Sphaeromatidae(F.)
Sphaeromyxina
Sphaeronum
Sphaeropauropus
Sphaeropelatops
Sphaerophthalminae
Sphaeropoeidae
Sphaeropsocidae
Sphaeroscapha
Sphaerosepalaceae
Sphaerosporoceros
Sphaerostylus
S-(Afrozaena)
S-(Sphaerostylus)
S-acutangulus
S-alluaudi
S-bimaculatus
S-brevipennis
S-ditomoides
S-feai
S-goryi
S-guineensis
S-insularis
S-levis
S-longipennis
S-luteus
S-punctutostriatus
S-striatus
S-vadoni
Sphaerosyne globisa(EXTINCT)
Sphaerotermes
Sphaerotheriida(giant pill millipedes)
S-e
Sphaerothorax
Sphagnopsida(peat mosses)
Sphallomorpha
Sphecidae
Sphecomyrma(EXTINCT)
S-canadensis(EXTINCT)
S-freyi(EXTINCT)
Sphecomyrminae(EXTINCT) (incertae sedis)
Sphecomyrmini(EXTINCT) (monophyly uncertain)
Sphecophila
Sphecoptera(EXTINCT)
Sphecopteridae
Sphecotheres(figbird)
Sphenacodontia
Sphenacodontidae(EXTINCT)
Sphenacodontoidea
Sphendysglossa
Sphenisciformes(Penguins)
Sphenoclea
Sphenodontida(tuataras and their extinct relatives)
Sphenoeacus(cape grass-warbler)
Sphenograptis
Sphenophalos(EXTINCT)
Sphenophryne
Sphenostemon
Sphenotrochus
Sphinctomyrmex
S-asper
S-caledonicus
S-cedaris
S-chariensis
S-clarus
S-cribratus
S-duchaussoyi
S-emeryi
S-froggatti
S-furcatus
S-imbecilis
S-mjobergi
S-myops
S-nigricans
S-occidentalis
S-rufiventris
S-septentrionalis
S-stali
S-steinheili
S-taylori
S-trux
S-turneri
Sphindidae(cryptic slime mold beetles)
Sphingidae(hawk moths)
Sphinginae
Sphingobacterium
Sphingomonadales
Sphingoquedius
Sphodrisomus
Sphodromantis
S-abessinica
S-aethiopica
S-annobonensis
S-aurea
S-baccettii
S-balachowskyi
S-biocellata
S-centralis
S-citernii
S-congica
S-conspicua
S-elegans
S-elongata
S-fenestrata
S-gastrica
S-gestri
S-giubana
S-gracilicollis
S-gracilis
S-hyalina
S-kersteni
S-lagrecai
S-lineola
S-obscura
S-pachinota
S-pardii
S-pavonina
S-quinquecallosa
S-royi
S-rubrostigma
S-rudolfae
S-tenuidentata
S-trimacula
S-viridis
Sphodropoda
S-lepida
S-loripes
S-quinquedens
S-tristis
S-viridis
Sphodrosomus monteithi
Sphodrosomus saisseti
Sphuridaethina
Sphyrias
Sphyriidae
Spialia
S-agylla
S-asterodia
S-colotes
S-confusa
S-delagoae
S-depauperata
S-diomus
S-doris
S-dromus
S-galba
S-geron
S-kituina
S-mafa
S-mangana
S-nanus
S-orbifer
S-osthelderi
S-paula
S-phlomidis
S-ploetzi
S-sataspes
S-secessus
S-sertorius
S-spio
S-struvei
S-therapne
S-wrefordi
S-zebra
Spilaptera(EXTINCT)
Spilapteridae(EXTINCT)
Spilargis
Spilodiscus(~9 species)
Spiloptilus(EXTINCT) (incertae sedis)
Spilorhombus
Spilornis
Spinacanthidae(EXTINCT)
Spinantenna(incertae sedis)
Spindasis
Spinicaudata
Spinicoxipaussus
Spiniphryne
Spinitermes
Spinocalanidae
Spinochordodes(non-monophyletic)
Spinosauridae(EXTINCT)
Spinoscapha
Spinothecidae
Spintharinae
Spinther
Spinulosacea
Spinulosida
Spioniades
S-abbreviata
S-artemides
S-libethra
Spionida
Spiophanicolidae
Spirachtha
Spirachthodes
Spiramiopsis comma(incertae sedis)
Spiricoelotes
Spirilliplanes
Spirillospora
Spirobolellidae
Spirobolida
S-e
Spirocerus(EXTINCT)
Spirochaeta
Spirochaetes(spiral-shaped chemoheterotrophs)
Spiromicrovirus
Spironemidae(several genera of heterotrophic flagellates)
Spiroplasma
Spirosoma
Spirostreptida
S-e
SpirulidaOwen, 1836
Spirulina
Spirurida(non-monophyletic)
Spizaetus(non-monophyletic)
Spizastur
Spiziapteryx circumcincta(spot-winged falconet)
Splachnales
Splanchnotrophidae
Splendeuptychia
S-ambra
S-ashna
S-aurigera
S-boliviensis
S-clementia
S-clorimena
S-cosmophila
S-doxes
S-furina
S-hygina
S-itonis
S-junonia
S-kendalli
S-latia
S-libitina
S-pagyris
S-purusana
S-quadrina
S-salvini
S-telesphora
S-toynei
S-triangula
S-zischkai
Spondylinae
Spondylophryne(EXTINCT)
Sponginticolidae
Spongiocnizontidae
Spongomonads(several genera of heterotrophic flagellates)
Spongopus
Sporadotragus(EXTINCT)
Sporanaerobacter
Sporichthya
Sporobacterium
Sporocytophaga
Sporohalobacter
Sporolactobacillus
Sporomusa
Sporormia
Sporormiaceae
Sporormiella
Spororminula
Sporosarcina
Sporotomaculum
Spotted Kiwis
Spumavirus
Spurgeon
Squalodelphidae(EXTINCT)
Squalodontidae(EXTINCT) (non-monophyletic) (incertae sedis)
Squamata(Lizards and snakes)
Squamicornia aequatoriella
Squamipaussus
Squamoptera
Squatinella
Squillidae
Srimara
Stachyuraceae
Stagmatoptera
S-abdominalis
S-binotata
S-biocellata
S-femoralis
S-flavipennis
S-hyaloptera
S-ignota
S-indicator
S-nova
S-pia
S-precaria
S-pumila
S-reimoseri
S-septentrionalis
S-supplicaria
Stagmatopterinae
Stagmomantinae(non-monophyletic)
Stagmomantis(monophyly uncertain)
S-amazonica
S-californica
S-carolina
S-centralis
S-colorata
S-domingensis
S-floridensis
S-fraterna
S-gracilipes
S-hebardi
S-heterogamia
S-limbata
S-montana
S-nahua
S-paraensis
S-parvidentata
S-theophila
S-venusta
S-vicina
Stalachtini
Stallingsia
S-jacki
S-maculosus
S-smithi
Stamnoderus
Stanieria
Stanmalcolmia
Staphyleaceae
Staphylinidae(rove beetles) (non-monophyletic)
Staphyliniformia(monophyly uncertain)
Staphylinina
Staphylininae
Staphylinini
Staphylinoidea(rove beetles, featherwing beetles, etc.)
Staphylinus
Staphylococcus
Staphylothermus
Staphylus
S-ascalaphus
S-ascalon
S-astra
S-azteca
S-balsa
S-buena
S-caribbea
S-cartagoa
S-ceos
S-chlora
S-chlorocephala
S-coecatus
S-cordillerae
S-corumba
S-eryx
S-esmeraldus
S-evemerus
S-fasciatus
S-hayhurstii
S-huigra
S-iguala
S-imperspicua
S-incanus
S-incisus
S-insignis
S-kayei
S-lenis
S-lizeri
S-mazans
S-melaina
S-melangon
S-melius
S-menuda
S-minor
S-mossi
S-musculus
S-oeta
S-parvus
S-perforata
S-perna
S-punctiseparatus
S-putumayo
S-sambo
S-saxos
S-shola
S-tepeca
S-tierra
S-tingo
S-tridentis
S-tucumanus
S-tyro
S-unicornis
S-veytius
S-vincula
S-vulgata
Starria
Startes
Statilia
S-agresta
S-apicalis
S-chayuensis
S-flavobrunnea
S-maculata
S-nemoralis
S-ocellata
S-pallida
S-spanis
S-viridibrunnea
Staurois
Stauropteridales(EXTINCT)
StauroteuthidaeGrimpe, 1916
Stayella
Steatoda
Steatornithidae(Oilbird)
Stectenidius
Stefania
Stegazopteryx ivimkaensis
Stegnosperma
Stegodontidae(EXTINCT)
Stegomyrmex
S-connectens
S-manni
S-vizottoi
Stegopelta(EXTINCT)0(incertae sedis)
Stegosauria(EXTINCT) (plated dinosaurs)
Stegotrachelidae(EXTINCT)
Steinernematidae
Steleops
Stelidiactis mopsiaeDanielssen 1890
Stellicomitidae
Stelloria(EXTINCT)
Stemmiulida
Stemmiulus
Stemmocryptidae
Stemonaceae
Stemonuraceae
Stemonyphantinae
Stenaesthetini
Stenaesthetus
Stenamma
S-africanum
Stenammini
Stenandriopsis Clade
Stenandrium Clade
Stenandrium afromontanum(Mildbr.) Vollesen(=Stenandriopsis afromontana (Mildbr.) Benoist)
Stenandrium guineensis(Nees) Vollesen(=Stenandriopsis guineense (Nees) Benoist)
Stenandrium humile Benoist Vollesen(Benoist ) Vollesen(=Stenandriopsis humile Benoist)
Stenandrium mandioccanumNees
Stenandrium pilosulum(S. F. Blake) T. F. Daniel
Stenandrium thompsonii(S. Moore) Vollesen(=Stenandriopsis thompsonii S. Moore)
Stenandrium warneckei(S. Moore) Vollesen(= Stenandriopsis warneckei (S. Moore) Napper)
Stenaptinus
Stenectinobregma
Stenectoneura
Stenembia
Steneuropa
Stenichnaphes
Stenichnoconnus
Stenichnodes
Stenichnoteras
Stenichnus
S-(Austrostenichnus)
S-(Scydmaenichnus)
S-(Scydmaenilla)
S-(Stenichnus)
Steninae
Stenistoderus
S-(Leptoglenus)
S-(Stenistoderus)
Stenoblatta
Stenocephalidae
Stenocephalomys
Stenocephaloon
Stenochoromus
Stenocliarthrus
Stenocolus
Stenocranophilus
S-anomalocerus
S-canadensis
S-dicranotropidis
S-perkinsiellae
S-quadratus
Stenocyathidae
Stenocyphon
Stenocyplanus
Stenodiapha(EXTINCT) (incertae sedis)
Stenodictya(EXTINCT)
Stenodictyoneura(EXTINCT)
Stenofustigerinus
Stenolaemata
Stenolinus
Stenolophina
Stenomalium
Stenomantis novaeguineae
Stenomastax
Stenomastigus
S-(Acanthostigus)
S-(Stenomastigus)
Stenomera
Stenomylinae(EXTINCT)
Stenomylus(EXTINCT)
Stenopelmatidae(jerusalem and king crickets, tree and giant weta)
Stenophalli
Stenopholea
Stenophrixothrix
Stenophylla
S-cornigera
S-lobivertex
Stenoplectus
Stenopleurus
Stenopodidea
Stenopsychidae
Stenopterygiibristlemouths, deep-sea hatchetfishes, and dragonfishes
Stenopyga
S-(Agriomantis) casta
S-(Stenopyga)
SS-belinga
SS-extera
SS-ipassa
SS-rhodesiaca
SS-tenera
SS-ziela
S-(Stenopygella)
SS-orientalis
SS-reticulata
SS-usambarica
Stenorhopalus
Stenosagola
Stenoschmidtiinae
Stenostiridae(fairy warblers, canary-flycatchers, blue-flycatchers)
Stenotrachelidae(false longhorn beetles)
Stenotrachelus
Stenotritidae
Stephanactis hyalonematisMc Murrich [sic] 1893
Stephanactis impeditusGravier 1918
Stephanactis indicaVerrill 1869
Stephanactis inornataGravier 1918
Stephanactis tuberculataHertwig 1882
Stephanauge
S-annularisCarlgren 1936
S-bulbosaCarlgren 1928
Stephanauge giganteusCarlgren 1941
Stephanoaetus
Stephanoberyciformes(pricklefishes and whalefishes)
Stephanocemas(EXTINCT)
Stephanoceros
Stephanocircidae
Stephanocyathus
Stephanoidea
Stephanopachys
Stephanophyllia
Stephanopis
Stephanopogon(genus of heterotrophic flagellates)
Stephanopoides
Stephanosmilia(EXTINCT)
Stephanospora
Stephensonactis
S-ornataPanikkar 1936
Stephidae
Stephopaedes
/Sterculioideae
Steremnia
S-agraulis
S-lucillae
S-monachella
S-pronophila
S-rugilas
S-selva
S-umbracina
Stereocephalus
Stereocerus
Stereochilus marginatus
Stereocyclops
Stereomyrmex
S-anderseni
S-dispar
S-horni
Stereospondyli(EXTINCT)
Stereostoma
S-angolense
S-balbisi
S-camerunum
S-clarkei
S-conradti
S-corpulentum
S-ertli
S-erythraeum
S-girardi
S-guineense
S-hirtipenne
S-ingens
S-inscisum
S-interstitiale
S-jeanneli
S-kuntzeni
S-praecellens
S-punctatum
S-punctisternum
S-rhodesianum
S-sansibaricum
S-senegalense
S-solidum
S-stuhlmanni
S-tenebriodes
S-titschacki
S-usambaricum
S-whitei
Stereus
S-(Deltocnemis)
S-(Stereus)
Sterncoelopsis
Sternocoelis
Sternolophus
S-(Neosternolophus)
S-(Sternolophus)
Sternopygidae
Sternorrhyncha(psyllids, whiteflies, aphids, coccids)
Sternotoxus
Sternotropa
Steroma
S-[n. sp. 1]
S-[n. sp. 2]
S-bega
S-modesta
S-superba
Steromapedaliodes(incertae sedis)
S-albarregas
S-albonotata
S-sanchezi
S-schuberti
Stetholiodes
Stethotaphrus
Stethusa
Stevensia
Steysborgia
Sthenocranion
Sthenopis
S-argenteomaculatus
Sthenopis auctt. nec Packard 1865
S-auratus
Sthenopis bouvieri
Sthenopis dirschi
S-purpurascens
Sthenopis regius
Sthenopis roseus
S-thule
Sthenoteuthis
Stibochiona
S-coresia
S-nicea
S-schoenbergi(incertae sedis)
Stiboges nymphidia
Stichellia
S-bocchoris
S-cuneifascia
S-dukinfieldia
S-pelotensis
Stichocotylidae
Stichodactis glandulosaLager 1911
Stichodactis kwietniewskiiLager 1911
Stichodactis papillosaKwietniewski 1897
Stichodonia
Stichoglossa
Sticholonche(genus of heliozoa with mobile arms)
Stichonotus
Stichophora cyaneaBrandt 1835
Stichophthalma
S-camadeva
S-howqua
S-louisa
S-neumogeni
S-nourmahal
S-sparta
S-uemurai
Stichostigma
Stichotrema
S-(Neostichotrema) gressitti
S-acutipennis
S-ambiguum
S-angolensis
S-anomalum
S-asahinai
S-barrosmachadoi
S-bassa
S-beckeri
S-boharti
S-capito
S-ceylonese
S-dallatorreanum
S-davao
S-dominicanum
S-ferenczi
S-fijiense
S-foxe
S-golias
S-harleyi
S-hoberlandti
S-jeyasothiae
S-kaszabi
S-krombeini
S-kuranda
S-laticeps
S-lindbergi
S-longiflagellatum
S-malayanum
S-mendolong
S-mexicanum
S-minor
S-nasutum
S-pasteelsi
S-rectipennis
S-retrosum
S-rhipidocolaxoides
S-robertsoni
S-silvaticum
S-simile
S-székessyi
S-triangulum
S-triblobulatum
S-vilhenai
S-waterhousi
S-webbiense
S-weitschati
S-yasumatsui
Stictalia
Stictococcidae
Stictocranius
Stictolampra
Stictolinus
Stictomadecassina
Stictomantis cinctipes
Stictomorphna
Stictonetta naevosa(Freckled Duck)
Stictostix(~8 species)
Stictus
Stigmacros
Stigmaphorus
Stigmatoteuthis
S-arcturiRobson, 1948
S-dofleiniPfeffer, 1912
S-hoylei(Goodrich 1896)
Stigmella
Stigmenamma heeri(EXTINCT) (incertae sedis)
Stigmomyrmex venustus(EXTINCT) (incertae sedis)
Stigonema
Stilbaceae
Stilbocrocis(EXTINCT)
Stilicastenus
Stilicina
Stilicoderus
Stilicopsina
Stilicopsis
Stiliderus
Stilipalpina
Stilipalpus
Stiliphacis
Stilocharis
Stilomedon
Stilosaurus
Stilpnoblatta
Stimula
Stinga
Stipesa
Stiphidiidae
Stiphromyrmex robustus(EXTINCT) (incertae sedis)
Stiphropella
Stiphropus
Stobbsia(EXTINCT) (incertae sedis)
Stochomys
Stockoceros(EXTINCT)
Stoichactiidae
Stoichactis
S-australisLager 1911
S-haddoniSaville Kent 1893
S-intermediaLager 1911
S-kentiHaddon and Shackleton 1893
S-laevisLager 1911
Stoides
Stokesosaurus clevelandi(EXTINCT) (incertae sedis)
Stolonata
Stolonis(monophyly uncertain)
S-apicatus
S-catenarius
S-dimidiaticornis
S-fulvostigma
S-gracilis
S-interceptus
S-laevicollis
S-leistoides
S-leucotelus
S-martinezi
S-notula
S-ovaticollis
S-parvulus
S-scortensis
S-spinosus
S-tapiai
S-willinki
S-yasuni
Stolopsyche(EXTINCT)
Stolotermes(incertae sedis)
StoloteuthisVerrill, 1881
S-leucoptera
S-maoria
S-weberi
Stomatococcus
Stomatopoda(mantis shrimps)
Stomis
S-pumicatus
S-termitiformis
Stomonaxellus
Stomphia
S-japonicaCarlgren 1943
Storenosoma
Storeyella
Storkeilla subtribe Labicheinae (Labichea, Petalostylis), (monophyly uncertain)
Strabena
S-affinis
S-albivittula
S-andilabe
S-andriana
S-argyrina
S-batesii
S-cachani
S-consobrina
S-consors
S-daphne
S-dyscola
S-eros
S-excellens
S-germanus
S-goudoti
S-ibitina
S-impar
S-isoalensis
S-mabillei
S-mandraka
S-martini
S-modesta
S-modestissima
S-mopsus
S-nepos
S-niveata
S-perrieri
S-perroti
S-rakoto
S-smithii
S-soror
S-sufferti
S-tamatave
S-triophthalma
S-tsaratananae
S-vicina
S-vinsoni
S-zanjuka
Strabocephalium
Strain BC52
Stramenopiles(diatoms, chrysophytes, brown algae, opalines, other algae & protozoa)
Straneostichus
Strasburgeria robusta
Stratiomyidae
Stratiomyinae
Stratiomyomorpha
Streblidae
Streblognathus
S-aethiopicus
S-peetersi
Strelitziaceae
Strepera(currawongs)
Strepsiptera(twisted-wing parasites) (incertae sedis)
Strepsirrhini(lemurs, galagos, lorises, etc.)
Streptoalloteichus
Streptobacillus
Streptocephalidae
Streptococcus
Streptognatha
Streptomonospora
Streptomyces
Streptomycineae
Streptophyta
Streptosiphon
Streptosporangineae
Streptosporangium
Streptothamnus moorei
Streptoverticillium
Striariidae
Stricteripus
S-banningeri
S-impressus
S-peruvianus
Strigia
Strigidae(Typical Owls)
Strigiformes(owls)
Strigomerodes
Strigomerus
Strigoplus
Strigota
Strix(Wood Owls)
S-albitarsis(Rufous-banded Owl)
S-aluco(Tawny Owl)
S-butleri(Hume's Owl)
S-chacoensis(Chaco Owl)
S-davidi(Pere David's Owl)
S-fulvescens(Fulvous Owl)
S-huhula(Black-banded Owl)
S-hylophila(Rusty-barred Owl)
S-leptogrammica(Brown Wood Owl)
S-nebulosa(Great Grey Owl)
S-nigrolineata(Black-and-white Owl)
S-occidentalis(Spotted Owl)
S-ocellata(Mottled Wood Owl)
S-rufipes(Rufous-legged Owl)
S-seloputo(Spotted Wood Owl)
S-uralensis(Ural Owl)
S-varia(Barred Owl)
S-virgata(Mottled Owl)
S-woodfordii(African Wood Owl)
Stromboidea(true conchs)
Strombopsis
Strongylida
Strongylognathus
S-afer
S-alboini
S-alpinus
S-arnoldii
S-caeciliae
S-chelifer
S-christophi
S-dalmaticus
S-destefanii
S-huberi
S-insularis
S-italicus
S-karawajewi
S-kervillei
S-koreanus
S-kratochvili
S-minutus
S-palaestinensis
S-pisarskii
S-rehbinderi
S-ruzskyi
S-silvestrii
S-testaceus
Strongyloididae
Strongylopthalmyiidae
Strongylopus
Strophariaceae s. str.
Strophius
Strophogastra
Strophopteryx
Strouhalium
Strumigenys
S-abdera
Struthidea(apostlebird)
Struthionidae(Ostriches)
Struthioniformes (Ratites)
Struthiosaurus(EXTINCT)
Struwela(incertae sedis)
Stuardosatyrus(incertae sedis)
Stumpffia
Sturmius
Sturnella
S-bellicosa(Peruvian Meadowlark) (incertae sedis)
S-defilippii(Pampas Meadowlark)
S-lilianae
S-loyca(Long-tailed Meadowlark) (incertae sedis)
S-magna
S-militaris(Red-breasted Meadowlark) (incertae sedis)
S-neglecta(Western Meadowlark)
S-superciliaris(incertae sedis)
Sturnidae(starlings)
Stygeonectes(EXTINCT)
Stygini
Stygionympha
S-dicksoni
S-geraldi
S-irrorata
S-robertsoni
S-scotina
S-vansoni
S-vigilans
S-wichgrafi
Stygiophyes
Stygothrombioidea
Stylatopsocus
Styletoentomon
Stylidiaceae
Stylina(EXTINCT)
Stylobasium
Styloceras
Stylochoerus(EXTINCT)
Stylocyathus(EXTINCT)
Stylogymnusa
Stylonuridae(EXTINCT)
Stylonuroidea(EXTINCT)
Stylopalpus
Stylopauropoides
Stylopauropus
Styloperla
Styloperlidae
Stylophylliina(EXTINCT)
Stylopidae
Stylopidia
Stylopyllioidea(EXTINCT)
Stylotermes
Stylotrochus(EXTINCT)
Styngetus
Styphlodromus
Styphlomerinus
Styphlomerus
Styphnolobium
Styphon(incertae sedis)
Styphrus(3 species)
Styracaceae
Styracoderus
Styracothoracidae
Styriodes
S-badius
S-dedecora
S-lyco
S-penna
S-planus
S-quadrinotata
S-quota
S-zeteki
Suada
S-albina
S-albolineata
S-cataleucos
S-swerga
Suastus
S-everyx
S-gremius
S-migreus
S-minutus
Subantilocapra(EXTINCT)
Subclemensia
Subhaida
Suborder Anomaluromorpha
Suborder Castorimorpha
Suborder Hystricomorpha
Suborder Myodonta
Suboscines(Simple voice-box, pan-tropical distribution)
Subsection I
Subsection II
Subsection III
Subsection IV
Subsection V
Subtercola
Subterrochus
Subulioiditermes
Subulipalpus
Subulitermes
Succinarthropterus(EXTINCT)
S-andreei(EXTINCT)
S-antiquus(EXTINCT)
S-aterrimus(EXTINCT)
S-balticus(EXTINCT)
S-fritschi(EXTINCT)
S-hagedorni(EXTINCT)
S-hermenaui(EXTINCT)
S-kuntzeni(EXTINCT)
S-schaufussi(EXTINCT)
S-simoni(EXTINCT)
S-skawarrae(EXTINCT)
S-subtilis(EXTINCT)
Succiniclasticum
Succinispira
Sucoca
Sucova
Sudanus
Suessenguthia
Sufifer
Sugaentulus
'Suhria' clade(includes species of Gelidium and species formerly in Onikusa and Suhria)
Suidae(hogs and pigs)
Suinae(modern hogs and pigs and their relatives)
Suipoxvirus
Sula
S-dactylatra(Masked Booby)
S-granti(Nazca Booby)
S-leucogaster(Brown Booby)
S-nebouxii(Blue-footed Booby)
S-sula(Red-footed Booby)
S-variegata(Peruvian Booby)
Sulawesina
Sulcanidae
Sulcia
Sulcifigia
Sulepta
Sulfobacillus
Sulfolobus
Sulfurihydrogenibium
Sulidae(Boobies and Gannets)
Sumalia(incertae sedis)
S-agneya
S-chilo
S-daraxa
S-zulema
Sumatera
Sundablatta
Sundamys
Sundapsocus
S-robertsoni
Sundasalangidae(incertae sedis)
Sundasciurus
Sunesta
Sungaria
Suniana
S-lascivia
S-subfasciata
S-sunias
Suniocharis
S-(Parasuniocharis)
S-(Suniocharis)
Suniophacis
Suniopsis
Suniosaurus
Suniotrichus
Sunius
S-(Caloderma)
S-(Hypomedon)
S-(Sunius)
S-(Trachysectus)
Sunorfa
S-(Sunorfa)
S-(Sunorfoides)
Supella
Superornatiremidae
Superstitionia
Superstitionidae
Suphis
Suphisellus
Surdomedon
Suriana
Surianaceae
Surnia ulula(Northern Hawk-Owl)
Sus(Eurasian pigs)
S-barbatus(bearded pig)
S-bucculentus(Vietnam warty pig)
S-cebifrons(Visayan warty pig)
S-celebensis(Celebes wild boar)
S-heureni(Flores warty pig)
S-philippensis(Philippine warty pig)
S-salvanius(pygmy hog)
S-scrofa(wild boar)
S-timoriensis(Timor wild boar)
S-verrucosus(Javan pig)
Suterina
Sutteriana
Suwallia
Suwalliini
Swan
Swartzieae sensu stricto
Sweltsa
Sylea
Syllegomydinaae
Syllidae
Syllidia
Sylligma
Sylvacoleodes admirandus(EXTINCT)
Sylvacoleus(EXTINCT)
Sylvicapra grimmia(bush duiker or gray duiker)
Sylvioidea
Sylvohymen(EXTINCT)
Syma
Symbion americanus
Symbion pandora
Symbiopsocus
Symbos(EXTINCT)
Symbrenthia
S-anna
S-brabira
S-dalailama
S-hippalus
S-hippoclus
S-hypatia
S-hypselis
S-hysudra
S-intricata
S-javanus
S-lilaea
S-niphanda
S-platena
S-silana
S-sinoides
Symilla
Symmachia
S-accusatrix
S-aconia
S-almeidai
S-arcuata
S-arion
S-aurigera
S-basilissa
S-batesi
S-busbyi
S-calderoni
S-calligrapha
S-calliste
S-elinas
S-eraste
S-esmerelda
S-exigua
S-falcistriga
S-fassli
S-fulvicauda
S-haeterina
S-hazelana
S-hippea
S-hippodice
S-jugurtha
S-juratrix
S-leena
S-leopardinum
S-maeonius
S-menetas
S-miron
S-multesima
S-nemesis
S-norina
S-pardalia
S-pardalis
S-phaedra
S-praxila
S-probetor
S-rita
S-rubina
S-rubrica
S-satana
S-sepyra
S-splendida
S-stigmosissima
S-suevia
S-technema
S-threissa
S-tigrina
S-titania
S-triangularis
S-tricolor
S-virgatula
S-virgaurea
S-xypete
Symmachiini
Symmixus
Symmocidae
Sympherobius
Symphilister
Symphoricarpos
Symphyla
Symphylella
Symphylellina
Symphylellopsis
Symphyomethes
Symphypleona
Symphytognathidae
Symphytognathoids
Symploca
Symplocaceae
Symploce
Symplocodes
Sympodangia
Sympolemon
Synacanthotermes
Synactinernus
S-flavusCarlgren 1918
Synaemops
Synaenictus
Synageles
S-albotrimaculatus
S-bishopi
S-canadensis
S-charitonovi
S-dalmaticus
S-hilarulus
S-idahoanus
S-leechi
S-lepidus
S-mexicanus
S-noxiosus
S-occidentalis
S-ovatus
S-pulcher
S-ramitus
S-repudiatus
S-scutiger
S-subcingulatus
S-venator
Synagelinae
Synagogidae
Synale
S-cynaxa
S-elana
S-hylaspes
S-metella
S-sylvanus
Synalus
Synandwakia
Synanthus mirabilisp.p. Verrill 1899
Synaphobranchidae
Synapsida(mammals and their extinct relatives)
Synapte
S-lutulenta
S-malitiosa
S-puma
S-salenus
S-shiva
S-silius
S-syraces
Synapticolidae
Synaptiphilidae
Synapturanus
Synargis
S-abaris
S-agle
S-anapis
S-axenus
S-bisfasciata
S-calyce
S-chaonia
S-dirca
S-ethelinda
S-fenestrella
S-galena
S-gela
S-mycone
S-nymphidioides
S-ochra
S-orestessa
S-palaeste
S-paulistina
S-phliasus
S-pittheus
S-regulus
S-soranus
S-sylvarum
S-tytia
S-victrix
Synaristus
Synarmoge(EXTINCT)
Synastreidae(EXTINCT)
Synbranchiformes(spiny and swamp eels)
Syncapritermes
Syncarida
Synchaeta
Synchaetidae
Synchortus
Synchroa
Synchroidae(synchroa bark beetles)
Syncope
Syndicus
S-(Semisyndicus)
S-(Syndicus)
Synechococcus
Synechocystis
Synecitonides
Synema
Synemosyna
S-americana
S-ankeli
S-aurantiaca
S-bimaculata
S-decipiens
S-edwardsi
S-fasciata
S-fissidentata
S-formica
S-hentzi
S-invemar
S-lauretta
S-lucasi
S-maddisoni
S-magniscuti
S-melanura
S-myrmeciaeformis
S-paraensis
S-petrunkevitchi
S-scutata
S-smithi
S-subtilis
S-taperae
S-ubicki
Synemosyninae
Synempora andesae
Synergistes(incertae sedis)
Synetister
Synhalcampella
Synhalcurias
Synhamitermes
Synneuridae
Synoditinus
Synoditulus(incertae sedis)
Synodus changnaensis(EXTINCT) (incertae sedis)
Synomaloptila(EXTINCT)
Synomaloptilidae
Synotaxidae
Synphellia aucklandicaCarlgren 1924
Synphellia dubiaCarlgren 1928
Synsicyonis
S-elongataHertwig 1888
Synstrophius
Syntaphus wheeleri(EXTINCT) (incertae sedis)
Syntectodes
Synteliidae
Syntermes
Syntheosciurus
Synthoracastilbus
Syntomium
Syntrophobacterales
Syntrophobotulus
Syntrophococcus
Syntrophomonadaceae
Syntrophospora
Syntrophothermus
Syntropis
Synurids
Sypheotides indica(Lesser Florican)
Syrbatomorphus
Syrbatus
S-(Syrbatidius)
S-(Syrbatus)
Syringa
Syringogastridae
Syrmatia
S-aethiops
S-astraea
S-lamia
S-nyx
Syrmaticus(Elliot's Pheasant and relatives)
S-ellioti(Elliot's Pheasant)
S-humiae(Mrs. Hume's Pheasant)
S-mikado(Mikado Pheasant)
S-reevesii(Reeves's Pheasant)
S-soemmerringii(Copper Pheasant)
Syrmocerus
Syroloma
Syrphidae
Syrphoidea
Syrraphesina
Systasea
S-microsticta
S-pulverulenta
S-zampa
Systelloderes
Systolosoma
S-breve
S-lateritium
Sytus
Szepligetella
section Parrya
section Pinus
section Quinquefoliae
section Trifoliae
sedis mutabilis
seven other genera
several hundred additional described species
sifakas
slow lorises
soft tenrecs
solenobiella group
solenopsidine tribe group(monophyly uncertain)
south temperate clade
striolata-group
subgenus Drephalys
subgenus Maevia
subgenus Marthae
subgenus Nivis
subgenus Paradrephalys
subgenus Paramaevia
subgenus Pinus
subgenus Strobus
subsection Australes
subsection Balfourianae
subsection Cembroides
subsection Contortae
subsection Gerardianae
subsection Pinaster
subsection Pinus
subsection Ponderosae
subsection Strobus
subtribe Duparquetiinae (Duparquetia)
sulpticollis subgroup
supergenus Batrachoseps
supergenus Bolitoglossa