Jacanidae(jacanas)
Jacobsoniidae
Jacobsonina
Jaekelopteridae(EXTINCT)
Jagrehnia
Jahnulales
Jamara
Janatella
J-fellula
J-hera
J-leucodesma
Janbechynea
Janibacter
Janinae
Janiodes
Janthinoidea
Janusculina
Japanophilus
Japetella diaphanaHoyle 1885
Japygidae
Jardine
Jarrigeus
Jasminum(non-monophyletic)
Jassidophaga(monophyly uncertain)
J-abscissa
J-argentisegmentata
J-armata
J-beatricis
J-chiiensis
J-contracta
J-eximia
J-fasciata
J-flavidipes
J-guangxiensis
J-hodosa
J-japonica
J-kurilensis
J-makarkini
J-pala
J-pilosa
J-plumbella
J-pollinosa
J-setosa
J-sidorenkoi
J-speciosa
J-triloba
J-verrucosa
J-villosa
Javablaste
Javania
Javapsocus
Jeana
J-delicatula
J-robiginosa
Jeannelia
Jeanneliusa
Jemadia
J-brevipennis
J-fallax
J-gnetus
J-hewitsonii
J-hospita
J-menechmus
J-pater
J-pseudognetus
J-scomber
J-sosia
Jentozkus
Jeotgalibacillus
Jeotgalicoccus
Jera
Jersimantis(EXTINCT)
J-burmiticus(EXTINCT) (Mid-Cretaceous amber, Myanmar)
J-luzzii(EXTINCT) (Mid-Cretaceous amber, New Jersey)
Jindabyne
Jitermes(EXTINCT) (Early Cretaceous of China)
Joalah
Joanna
J-boxi
J-joanna
Jochmansiella
Johnrehnia
Johnsonella
Joiceya praeclarus
Joinvilleaceae
Jollas
J-amazonicus
J-geniculatus
J-manantiales
J-paranacito
J-pompatus
J-puntalara
Jonaspyge
J-aesculapus
J-jonas
J-tzotzili
Jonesia
Jongiana
Jongmansia(EXTINCT) (incertae sedis)
Joppeicidae
Jordanathrix
Josettekia
Jotepperia
JoubiniteuthidaeNaef, 1922
Joyeuxella
Jubini
Jubomorphus
Jubula lettii(Maned Owl)
Jubus
Juditha
J-azan
J-caucana
J-dorilis
J-inambari
J-molpe
J-naza
J-odites
J-pulcherrima
Juglandaceae(walnut family)
Jugositermes
Julbernardia
Julida
J-e
Juliformia
Juliomys
Julodinae
Juncaginaceae
Junea
J-doraete
J-dorinda
Junodia
J-amoena
J-beieri
J-congicus
J-hararensis
J-lameyi
J-maculata
J-spinosa
J-strigipennis
J-vansomereni
Junonia
J-adulatrix(incertae sedis)
J-africana(incertae sedis)
J-almana(incertae sedis)
J-ansorgei(incertae sedis)
J-artaxia
J-atlites(incertae sedis)
J-chorimene(incertae sedis)
J-coenia
J-cymodoce
J-cytora
J-erigone
J-evarete(incertae sedis)
J-genoveva(incertae sedis)
J-goudoti(incertae sedis)
J-hadrope(incertae sedis)
J-hedonia(incertae sedis)
J-hierta(incertae sedis)
J-iphita
J-lemonias(incertae sedis)
J-natalica
J-oenone
J-orithya(incertae sedis)
J-rhadama(incertae sedis)
J-schmiedeli(incertae sedis)
J-sophia
J-stygia(incertae sedis)
J-terea
J-timorensis(incertae sedis)
J-touhilimasa
J-vestina(incertae sedis)
J-westermanni(incertae sedis)
Junoniini
Jurecekia
Jurodidae(EXTINCT)0(incertae sedis)
Juscelinomys(incertae sedis)
Jussiaeeae
Justicieae
Justinia
J-gava
J-gertschi
J-justinianus
J-kora
J-maculata
J-papaea
J-phaetusa
J-septa