RTA Clade
Rabaticeras(EXTINCT)
Rabaudauropus
Rabidosa
Rabigus
Rabyxis
R-(Pseudobaxyris)
R-(Rabyxis)
Rachelia
R-extrusa
R-icosia
Racta
R-apella
R-chiria
R-dalla
R-plasma
R-racta
Radama
Radamellus
Radamides
Radamina
Radamira
Radamopsis
Radevia
Radianthus
R-KuekenthaliKwietniewski 1896
R-lobatusKwietniewski 1897
Radiatus radiatus
Radulomyces
Radziella
Rafflesiaceae(incertae sedis)
Raffrayia
Raffrayidius
Raffrayites
R-(Raffrayites)
R-(Raffrayitidia)
Raffrayola
Raffrayolus
Ragactis pulcra[sic] Andres 1883
Ragadia
R-annulata
R-crisilda
R-critias
R-luzonia
R-maganda
R-makuta
R-melindena
Ragadiina
Ragytodes
Ragytodina
Rakomylus(EXTINCT)
Rallicolidae
Rallidae(Rails)
Rallina(Chestnut Forest Crake and relatives)
R-canningi(Andaman Crake)
R-eurizonoides(Slaty-legged Crake)
R-fasciata(Red-legged Crake)
R-forbesi(Forbes's Forest Crake)
R-leucospila(White-striped Forest Crake)
R-mayri(Mayr's Forest Crake)
R-rubra(Chestnut Forest Crake)
R-tricolor(Red-necked Crake)
Rallus(Clapper Rail and relatives)
R-aequatorialis(Ecuadorian Rail)
R-antarcticus(Austral Rail)
R-aquaticus(Water Rail)
R-caerulescens(African Rail)
R-elegans(King Rail)
R-limicola(Virginia Rail)
R-longirostris(Clapper Rail)
R-madagascariensis(Madagascar Rail)
R-semiplumbeus(Bogota Rail)
R-wetmorei(Plain-flanked Rail)
Ramanella
Ramboia
Rambousekiella
Ramecia
Ramelbida
Ramicristates(most amoebae, including dictyostelid and myxomycete slime moulds and Hyperamoeba)
Ramoceros(EXTINCT)
Ramphastidae(toucans)
Ramussia
Rana
R-(Pelophylax)(A group of water-bound frogs inhabiting Eurasia)
R-(others)(non-monophyletic)
Rana bedriagae
Rana cerigensis
Rana cretensis
Rana epeirotica
Rana fukiensisPope 1929
Rana hubeiensisFei & Ye 1982
Rana lateralisBoulenger 1887
Rana lessonae
Rana nigrolineataLiu & Hu 1959
Rana nigromaculataHallowell 1861
Rana perezi
R-pipiens group
Rana plancyiLataste 1880
Rana porosaCope 1868
Rana ridibunda
Rana saharica
Rana shqiperica
Rana shuchinaeLiu 1950
Rana terentievi0(incertae sedis)
Ranavala
R-(Fanovana)
R-(Masoala)
R-(Ranavala)
Ranavalidius
Ranavalodes
Ranavirus
Randa
Rangifer tarandus(reindeer, caribou)
Rangiola
'Ranidae'(non-monophyletic)
Raninae
Ranis(EXTINCT)
Ranodon sibericus
Ranunculaceae(buttercup family)
Ranunculales
Raoellidae(EXTINCT)
Rapateaceae
Raphactis Caribea[sic] Verrill 1899
Raphactis nitidusVerrill 1899
Raphetis
Raphicerus(grysboks, steenboks)
R-campestris(steenbok)
R-melanotis(Cape grysbok)
R-sharpei(Sharpe's grysbok)
Raphidiidae
Raphidiomima(EXTINCT)
Raphidiomimidae(EXTINCT) (incertae sedis)
Raphidiomimula burmitica(EXTINCT) (Cretaceous amber of Myanmar)
Raphidioptera(snakeflies)
Raphidophytes
Raphidovirus
Raphignathoidea
Raphitreodes
Raphitreus
Rapismatidae0(incertae sedis)
Raptophasma kerneggeri(EXTINCT) (Eocene Baltic amber)
Raptrix
R-fusca
R-fuscata
R-intermedia
R-occidentalis
R-perspicua
Rareuptychia
Rarobacter
Rastrognathia
Rataniidae
Ratardinae
Ratemiidae
Rathayibacter
Rathymus
Rattus(non-monophyletic)
Rattus group
Ratufinae(giant squirrel)
Ratugnathia
Rauisuchia(EXTINCT)
Ravasinia
Rawarena
Raxybis
Recchia
Rechota
Recurvidris
R-browni
R-glabriceps
R-hebe
R-kemneri
R-nuwa
R-pickburni
R-proles
R-recurvispinosa
R-williami
Recurvirostridae(stilts, avocets)
Redema
Redensekia
Redfieldiidae(EXTINCT)
Redlichiida(EXTINCT)
Reduced pyriform clade
Redunca arundinum(southern reedbuck)
Redunca fulvorufula(mountain reedbuck)
Redunca redunca(Bohar reedbuck)
Reduncinae(reedbucks, waterbuck, kob, puku, and lechwes)
Reduviidae(assassin bugs, ambush bugs, thread-legged bugs)
Regimbartia
Reginamimus
Regulidae(kinglets)
Rehniella planicephala
Reichardtia(1 species)
Reichardtiolus(2 species)
Reicheiodes
Reichenbachella
Reichenbachia
Reinickella
Reithrodon
R-auritus
R-typicus
Rejanellus
Relictivomer
Reliquia santamarta(incertae sedis)
Remaining Lampanyctinae
Remella
R-cusillunia
R-duena
R-remus
R-rita
R-vopiscus
Remipedia
Remizidae(penduline tits)
Remus
Remyella
Remypus
Remysymphyla
Renardia
Renda
Renibacterium
Reninoides
Reninopsis
Reninus(non-monophyletic)
Rennenismilia(EXTINCT)
Renotus
Reoviridae
Repens repens
Reptantia(monophyly uncertain)
Reptilia
Reptiliomorpha
Resachus
Resedaceae
Resticula
Restionaceae
Retelytron conopeum(EXTINCT)
Reticulitermes
Reticulosphaera
Retiro
Retropinnidae
Retroviridae
Retteneciton
Reussangia(EXTINCT)
Rhabdiopteryx
Rhabditina
Rhabdoblatta
Rhabdochlamydia
Rhabdocoela
Rhabdocupes(EXTINCT)
Rhabdodendron(incertae sedis)
Rhabdodryas(incertae sedis)
Rhabdolepidae(EXTINCT)
Rhabdomantis
R-galatia
R-sosia
Rhabdomys
Rhabdopleuridae
Rhabdopsidius
Rhabdopsis
Rhabdoptilus(EXTINCT)
Rhabdornis(rhabdornises)
Rhabdospora
Rhabdotus reflexus
Rhabdoviridae
Rhachimantis carinata
Rhachiostethus
Rhacophoridae
Rhacophorinae
Rhacophorus
Rhadinichthyidae(EXTINCT)
Rhadinotermes
Rhadinovirus
Rhadinoxenus
Rhaebobates
Rhaebolestes
Rhagadillius
Rhagatherium(EXTINCT)
Rhagionidae
Rhagodidae
Rhagomys
Rhagophthalmus
Rhamnaceae(buckthorn family)
Rhamophorus
Rhamphichthyidae
Rhamphophryne
Rhaphicera
R-dumicola
R-moorei
R-satricus
Rhaphidiopsidae
Rhaphidiopsis(EXTINCT)
Rhaphidophoridae(camel crickets and cave crickets (cave weta))
Rhaphiocerinae
Rhaphiomydinae
Rhathymini
Rhea americana(Greater Rhea)
Rheidae(Rheas)
Rheinardia ocellata(Crested Argus)
Rheithrosciurus
Rhene
R-albigera
R-atrata
R-aurata
R-banksii
R-biembolusa
R-biguttata
R-brevipes
R-bufo
R-callida
R-callosa
R-candida
R-capensis
R-cooperi
R-daitarensis
R-danieli
R-darjeelingiana
R-decorata
R-flavicomans
R-flavigera
R-foai
R-gambeyi
R-hirsuta
R-inconcinna
R-indica
R-ipis
R-jelskii
R-khandalaensis
R-lesserti
R-machadoi
R-margarops
R-mordax
R-mus
R-nigrita
R-parvula
R-rubrigera
R-saeva
R-setipes
R-sulfurea
R-tamula
R-tricolor
R-vaga
Rhenopteridae(EXTINCT)
Rhenopteroidea
Rheobatrachus
Rheobioma
Rheomys
R-hartmani
R-mexicanus
R-thomasi
R-underwoodi
Rhescyntis
Rhetenor
R-diversipes
R-texanus
Rhetus
R-arcius
R-dysonii
R-periander
Rhexidius
Rhexiina
Rhexinia
Rhexiola
Rhexius
R-(Rafrhexius)
R-(Rhexinexus)
R-(Rhexius)
Rhicnoda
Rhigonematida
Rhincalanidae
Rhinocerotidae(rhinoceroses & extinct relatives)
Rhinocricidae
Rhinocryptidae(tapaculos)
Rhinoderma
R-darwinii
R-rufum
Rhinoglena
Rhinolophidae(Horseshoe bats)
Rhinolophinae
Rhinolophoidea
Rhinopalpa polynice
Rhinophoridae
Rhinophrynidae
Rhinophrynus
R-dorsalis
R-sp.(EXTINCT)
Rhinopomatidae(Mouse-tailed Bats)
Rhinopomatoidea
Rhinorhipidae
Rhinoscepsina
Rhinotermes
Rhinotermitidae(Subterranean termites) (monophyly uncertain)
Rhinotermopsenius
Rhinotoridae
Rhinozethus
Rhinthon
R-bushi
R-cubana
Rhipicera
Rhipiceridae(cedar beetles, cicada parasite beetles)
Rhipidomys
Rhipiduridae(fantails)
Rhipiphoridae
Rhipipterygidae
Rhipsideigma
R-adjuncta
R-cretaceotincta
R-lugubris
R-raffrayi
Rhiscosomididae
Rhizangia(EXTINCT)
Rhizangiidae
Rhizidiovirus
Rhizobiales
Rhizocephala
Rhizochromulinaales
Rhizodontimorpha(EXTINCT)
Rhizogoniales
Rhizolepadidae
Rhizomyinae(bamboo rats and African mole rats)
Rhizoperthodes
Rhizophoraceae(red mangrove family)
Rhizosmilia
Rhizothera(Long-billed Partridge and relatives)
R-dulitensis(Hose's Partridge)
R-longirostris(Long-billed Partridge)
Rhizothricidae
Rhizotrochus
Rhodobacterales
Rhodococcus
Rhodoglobus
Rhodogorgonales
Rhodomantis
R-carinicollis
R-gracilis
R-pulchella
R-queenslandica
Rhodomelaceae
Rhodomeloideae
Rhodophyta(red algae)
Rhodopiola
Rhodospirillales
Rhodothermus
Rhodymeniales
Rhoicinaria
Rhoipteleaceae
Rhomantis moultoni
Rhombocoleidae(EXTINCT)
Rhombocoleites adumbratus(EXTINCT)
Rhombocoleus andreae(EXTINCT)
Rhombodera
R-basalis
R-boschmai
R-brachynota
R-butleri
R-crassa
R-doriana
R-extensicollis
R-extraordinaria
R-flava
R-fratricida
R-fusca
R-handschini
R-javana
R-keiana
R-kirbyi
R-laticollis
R-latipronotum
R-lingulata
R-megaera
R-mjoebergi
R-morokana
R-ornatipes
R-palawanensis
R-papuana
R-rennellana
R-rollei
R-sjoestedti
R-stalii
R-taprobana
R-tectiformis
R-titania
R-valida
R-woodmasoni
R-zhangi
Rhomboderella
R-gabonica
R-parmata
R-scutata
R-thorectes
Rhombophryne
Rhombopsammia
Rhombosternum(monophyly uncertain)
Rhombozoa
Rhomphocallus
Rhopalidae(scentless plant bugs)
Rhopaliinae
Rhopalinda
Rhopalocera
Rhopalocerina
Rhopalogastrum
Rhopaloiulidae
Rhopalomastix
R-escherichi
R-janeti
R-omotoensis
R-rohneyi
R-umbracapita
Rhopalomutillinae
Rhopalopherus
Rhopalopsyllidae
Rhopalosiphina
Rhopalosole
Rhopalosomatidae
Rhopalotella
Rhopalothrix
R-acutipilis
R-ciliata
R-diadema
R-inopinata
R-isthmica
R-kusnezovi
R-orbis
R-plaumanni
R-stannardi
R-weberi
Rhopalotyphlus
Rhopaluridae
Rhopalurus
Rhopalybia
Rhoptrodinarda
Rhoptromyrmex
R-caritus
R-critchleyi
R-globulinodis
R-mayri
R-melleus
R-opacus
R-rawlinsoni
R-schmitzi
R-transversinodis
R-wroughtonii
Rhyacophilidae(Spicipalpia)
Rhyacosiredon altimirani
Rhyacosiredon leorae0(incertae sedis)
Rhyacosiredon rivularis
Rhyacosiredon zempoalaensis0(incertae sedis)
Rhyacotriton cascadae
Rhyacotriton kezeri
Rhyacotriton olympicus
Rhyacotriton variegatus
Rhyacotritonidae
Rhycherus
Rhynchactis
Rhynchocalycaceae
Rhynchocephalia
Rhynchocheilus
Rhynchoclaviger
Rhyncholepis(EXTINCT)
Rhynchomolgidae
Rhynchomys
Rhynchonelliformea
Rhynchoplectus
Rhynchortyx cinctus(Tawny-faced Quail)
Rhynchosauria(EXTINCT)
Rhynchotermes
Rhynchothorax
Rhynchotus(Red-winged Tinamou and Huayco Tinamou)
R-maculicollis(Huayco Tinamou)
R-rufescens(Red-winged Tinamou)
Rhyncocheilus
Rhyncophthirina
Rhyniella praecursor(EXTINCT)
Rhyniopsida(EXTINCT)
Rhynochetos jubatus(Kagu)
Rhynotragus(EXTINCT)
Rhypharobia
Rhypochares(3 species)
Rhysodes
R-comes
R-sulcatus
Rhysodina
Rhysodini(wrinkled bark beetles) (incertae sedis)
Rhysopus
Rhyssalinae
Rhyssoleptoneta
Rhytidochrotinae
Rhytidognathus
Rhytidometopum
Rhytidoponera
R-abdominalis
Rhytiferonia
Rhytismatales
Rhytisternus
Rhytus
Rhyzodiastes
R-(Rhyzoarca)
R-(Rhyzodiastes s. str.)
R-(Rhyzostrix)
R-(Rhyzotetrops)
R-(Temoana)
R-alveus
R-bifossulatus
R-bipunctatus
R-bonsae
R-burnsi
R-convergens
R-costatus
R-davidsoni
R-denticauda
R-fairmairei
R-fossulatus
R-frater
R-gestroi
R-guineensis
R-indigens
R-liratus
R-maderiensis
R-maritimus
R-menieri
R-mindoro0(incertae sedis)
R-mirabilis
R-mishmicus
R-montrouzieri
R-myopicus
R-nitidus
R-ovicollis
R-parumcostatus
R-patruus
R-pentacyclus
R-pollinosus
R-preorbitalis
R-propinquus
R-proprius
R-quadristriatus
R-raffrayi
R-riedeli0(incertae sedis)
R-rimoganensis
R-singularis
R-spissicornis
R-sulcicollis
R-suturalis
R-vadiceps
R-waterhousei
Rhyzopertha
Riatia
Ribautiella
Ribodon(EXTINCT)
Ricaniidae
Richanitschia
Richardiidae
Ricinidae
Ricinulei
Rickettsiales
Ridens
R-allyni
R-bidens
R-biolleyi
R-bridgmani
R-crison
R-fieldi
R-fulima
R-fulminans
R-harpagus
R-mephitis
R-mercedes
R-miltas
R-nora
R-pacasa
R-panche
R-philistus
R-ridens
R-telegonoides
R-toddi
R-tristis
Ridgewayiidae
Riemerella
Rientis
Rigidipenna inexpectatus
Rikenella
Rimba
Riodina
R-lycisca
R-lysippoides
R-lysippus
Riodinidae(metalmark butterflies)
Riodininae
R-- incertae sedis(non-monophyletic)
Riodinini
Riojasaurus(EXTINCT)
Rioneta
Riphaterus
Ripogonaceae
Risidae
Rissooidea
Rivetia papillosaPax 1912
Rivetina
R-asiatica
R-baetica
R-balcanica
R-beybienkoi
R-buettikeri
R-byblica
R-caucasica
R-compacta
R-crassa
R-dentata
R-deserta
R-dolichoptera
R-elegans
R-excellens
R-gigantea
R-inermis
R-karadumi
R-karateginica
R-laticollis
R-monticola
R-nana
R-pallida
R-parva
R-pulisangini
R-rhombicollis
R-similis
R-syriaca
R-tarda
R-varsobica
Rivetinini
Rivetinula fraterna
Rivularia
Robia
Robiacina(EXTINCT)
Robiatherium(EXTINCT)
Robinieae
Robinioid clade
Robshelfordia
Robusticoelotes
Rochdalia(EXTINCT) (incertae sedis)
Rodentia(mice, rats, squirrels, gophers, porcupines, beavers, etc.)
Rodinia
Rodwayia
Rodylopora
Roeberella
R-calvus
R-flocculus
R-gerres
R-lencates
Roeslerstammia
Roeslerstammiidae
Rogadinae
Rogeria
R-alzatei
Rogermantis
R-natalensis
R-royi
Rohana
R-macar
R-nakula
R-parisatis
R-parvata
R-rhea
Rolepa
Rolfeia(EXTINCT)
Rolla
Rollulus rouloul(Crested Partridge)
Romaleidae
Romblonella
R-elysii
R-heatwolei
R-opaca
R-palauensis
R-scrobifera
R-townesi
R-vitiensis
R-yapensis
Romeriida
RondeletiolaNaef, 1921
R-capensis
R-minor
Ronetus
Roniviridae
Ropalomeridae
Rophitinae
Roproniidae
Roridulaceae
Rosaceae(rose family)
Rosales
Roscidotoga
Rosciszewskia
Roseala bourgognei
Roseburia
Roseiflexus
Roseolovirus
Rosettauropus
Rosette agent(parasitic protist)
Rosids
RossiaOwen, 1834
R-brachyura
R-bullisi
R-enigmatica
R-macrosoma
R-megaptera
R-moelleri
R-mollicella
R-pacifica
RP-diegensis
RP-pacifica
R-palpebrosa
R-tortugaensis
Rossianidae
RossiinaeAppellof, 1898
Rossites
Rossocoleus(EXTINCT)
Rossomyrmex
R-minuchae
R-proformicarum
R-quandratinodum
Rostratulidae(painted-snipe)
Rostrhamus
Rostromyrmex pasohensis
Rostrotermes
Rotaria
Rotastruma
R-recava
R-stenoceps
Rotavirus
Rothevania valdiviana
Rothia
Rothisilpha
Rothium
Rotifera(rotifers) (incertae sedis)
Rotoitidae
Rotundiclipeidae
Rotunditermes
Rotundopteris(EXTINCT)
Roubaliella
Rougemontiella
Rougetius rougetii(Rouget's Rail)
Roussea
Rousseletia
Royerella
Rozella spp.
Ruacorites
Rubiaceae(coffee family, including Emblingiaceae and Dialypetalanthus fuscescens)
Rubrisciurus
Rubrius
Rubrobacter
Rubrobacterales
Rucervus duvaucelii(barasingha)
Rucervus schomburgki(EXTINCT) (Schomburgk's deer)
Rudebeckia
Rudiviridae
Rudra
R-baurensis
R-geniculata
R-humilis
R-minensis
R-multispina
R-oriximina
R-polita
R-proxima
R-tenera
R-wagae
Ruellia acutangula(Nees) Lindau
Ruellia adenocalyxLeonard
Ruellia alboviolaceaLindau
Ruellia amoenaSesse & Moc.
Ruellia amplexicaulis(Nees) Lindau
Ruellia anaticollisBenoist
Ruellia angustiflora(Nees) Lindau
Ruellia ansericollisBenoist
Ruellia asperulaLindau
Ruellia beyrichiana(Nees) S. Moore
Ruellia biolleyiLindau
Ruellia blechumL.(= Blechum pyramidatum (Lam.) Urb.)
Ruellia bourgaeiHemsl.
Ruellia breedloveiT. F. Daniel
Ruellia brevifolia(Pohl) C. Ezcurra
Ruellia brittonianaLeonard
Ruellia bulbiferaLindau
Ruellia caroliniensis(Walt.) Steud.
Ruellia chartacea(T. Anders.) Wassh.
Ruellia ciliatifloraHook.
Ruellia coeruleaMorong
Ruellia conzattiiStandl.
Ruellia cordataThunb.
Ruellia costata(Nees) Lindau
Ruellia densa(Nees) Hiern
Ruellia detonsaBenoist
Ruellia discifoliaOliver
Ruellia donnell-smithiiLeonard
Ruellia drummondiana(Nees) A. Gray
Ruellia edwardsaeTharp & F. A. Barkley
Ruellia elegansPoir.
Ruellia eriocalyxGlaz.
Ruellia erythropus(Nees) Lindau
Ruellia eumorphanthaLindau
Ruellia eurycodonLindau
Ruellia exsertaWassh.
Ruellia floribundaHook.
Ruellia foetidaWilld.
Ruellia fruticosaSesse & Moc.
Ruellia fulgens(Bremek.) E. Tripp(= Polylychnis fulgens Bremek.)
Ruellia fulgidaAndr.
Ruellia galeottiiLeonard
Ruellia geayi(Benoist) E. Tripp(= Eusiphon geayi Benoist)
Ruellia geminifloraH. B. K.
Ruellia gracilisRusby
Ruellia grantiiLeonard
Ruellia haenkeana(Nees) Wassh.
Ruellia hapalotrichaLindau
Ruellia harveyanaStapf
Ruellia harveyana clade
Ruellia hookeriana(Nees) Hemsl.
Ruellia humboldtiana(Nees) Lindau
Ruellia humilisNutt.
Ruellia humilis clade
Ruellia hygrophilaMart.
Ruellia incompta(Nees) Lindau
Ruellia inflataRich.
Ruellia inflata clade
Ruellia insignisBalf.f.
Ruellia inundataH. B. K.
Ruellia inundata clade
Ruellia ischnopodaLeonard
Ruellia jaliscanaStandl.
Ruellia jaliscana clade
Ruellia jimulcensis
Ruellia jussieuoidesSchltdl. & Cham.
Ruellia lacteaCav.
Ruellia latisepalaBenoist
Ruellia leucanthaBrandegee
Ruellia lineari-bracteolataLindau
Ruellia longepetiolata(Oerst.) Hemsl.
Ruellia longifilamentosaLindau
Ruellia longipedunculataLindau
Ruellia macrophyllaVahl var. lutea Leonard
Ruellia macrosolenLillo ex. C. Ezcurra
Ruellia magniforaC. Ezcurra
Ruellia malacaLeonard
Ruellia malacophyllaC. B. Clarke
Ruellia matagalpaeLindau
Ruellia matudaeLeonard
Ruellia mayaT. F. Daniel
Ruellia mcvaughiiT. F. Daniel
Ruellia megachlamysS. Moore
Ruellia menthifoliaLeonard
Ruellia menthoidesLeonard
Ruellia metzaeTharp
Ruellia morongiiBritton
Ruellia multifolia(Nees) Lindau
Ruellia nitida(Nees) Wassh. & J.R.I. Wood
Ruellia nobilisLindau
Ruellia novogalicianaT. F. Daniel
Ruellia nudiflora(Englem & A. Gray) Urb.
Ruellia oaxacanaLeonard
Ruellia paniculataL.
Ruellia patulaJacq.
Ruellia pearceiRusby
Ruellia pedunculosa(Nees) Lindau
Ruellia pennelliiLeonard
Ruellia petiolaris(Nees) T. F. Daniel
Ruellia pilosa(Nees) Pav. ex Nees
Ruellia pringleiFernald
Ruellia proximaLindau
Ruellia puri(Nees) Mart. ex Jackson
Ruellia purshianaFernald
Ruellia pygmeaDonn. Sm.
Ruellia riopalenquensisWassh.
Ruellia rubraAubl.
Ruellia ruiziana(Nees) Lindau
Ruellia runyoniiTharp & F. A. Barkley
Ruellia s.l.
Ruellia salviaefolius(Nees) Lindau
Ruellia sanguieaGriseb.
Ruellia saulensisWassh.
Ruellia speciosa(Nees) Lindau
Ruellia spissaLeonard
Ruellia standleyiLeonard
Ruellia stemonacanthoides(Oerst.) Hemsl.
Ruellia steyermarkiiWassh.
Ruellia strepensL.
Ruellia subsessilis(Mart.) Lindau
Ruellia tarapotanaLindau
Ruellia terminale(Nees) Wassh.
Ruellia tomentosa(Nees) Lindau
Ruellia tuberosaL.
Ruellia tubifloraH. B. K.
Ruellia tuxtlensisT. P. Ramamoorthy & Y. Hornelas
Ruellia verbasciformis(Nees) C. Ezcurra & Zappi
Ruellia villosaLindau
Ruellia yurimaguensisLindau
Ruellieae
Ruellioideae
Rugegius
Rugelytron(EXTINCT) (incertae sedis)
Rugiloricus
Rugilus
R-(Afrostilicus)
R-(Allostilicus)
R-(Cephalostilicus)
R-(Eurystilicus)
R-(Fossulostilicus)
R-(Hemistilicus)
R-(Heterostilicus)
R-(Mirostilicus)
R-(Parastilicus)
R-(Pedistilicus)
R-(Rugilus)
R-(Scabrostilicus)
R-(Tetragnathostilicus)
Rugitermes
Rugogastridae
Rugosa(EXTINCT) (monophyly uncertain)
Ruminantia(deer, cattle, goats, sheep, antelopes, giraffe, etc.)
Ruminococcus
Runcinia
Runella
Rupicapra(chamois)
R-pyrenaica(Pyrenean chamois)
R-rupicapra(chamois)
Ruppiaceae
Ruptitermes
Rusingoryx(EXTINCT)
Russulales
Rutaceae(citrus family)
Rutidermatidae
Rutitherium(EXTINCT)
Ryania
Rybaxidia
Rybaxis
Rybinskiella
R-(Eurybinskiella)
R-(Rybinskiella)
R-(Sintania)
Rygmodini
Rygmodus
Rygmostralia
Rylodophila
Ryocalanidae
Rytiodontinae
Rytiodus(EXTINCT)
Rytus
Ryvkinius(EXTINCT)
Ryxabis