Dodatak:Abecedni popis trilobita: J
Ja uredi
Jakutidae, Jakutus, Janxilithus, Jasperia,
Je uredi
Jegorovaia, Jessievillia,
Ji uredi
Jiagouia Qiu in Qiu et al., 1983 † uredi
- †Jiagouia jiagouensis Qiu 1983
Trilobita → Ptychopariida → Ptychopariidae
Jialaopsis Qian & Zhou in Lu et al., 1974 † uredi
- †Jialaopsis latus Qian and Zhou 1974
Trilobita → Ptychopariida → Ptychopariidae
†Jiangjunshania Qiu 1983 uredi
Animalia → Arthropoda → Trilobita → Ptychopariida
†Jiangsuaspis Lin 1983 uredi
Animalia → Arthropoda → Trilobita → Ptychopariida
†Jiangsucephalus Qiu 1983 uredi
Animalia → Arthropoda → Trilobita → Ptychopariida
†Jiangsuia Lin et al. 1983 uredi
- †Jiangsuia cylindrica Qian and Zhou 1984
- †Jiangsuia typica Lin et al. 1983
Trilobita → Ptychopariida → Proasaphiscidae
Jimachongia Yuan and Yin 1998 uredi
- †Jimachongia lata Yuan and Yin 1998
Trilobita → Ptychopariida → Cedariidae
†Jimanomocare Yuan and Yin 1998 uredi
- †Jimanomocare nanum Yuan and Yin 1998
Trilobita → Asaphida → Anomocaridae
Jimbokranion Kobayashi and Hamada 1984 uredi
- †Jimbokranion subovalis Kobayashi and Hamada 1984
Trilobita → Proetida → Phillipsiidae → Ditomopyginae Jinghediscus, Jingyangia, Jiulongshania,
Jo uredi
Jonotus, Josephulus, Joshuaspis,
Ju uredi
†Jubileia Kobayashi 1938 uredi
Animalia → Arthropoda → Trilobita Judaiella, Judomiella, Judomiidae,
†Jujuyaspis Kobayashi, 1936 uredi
- †Jujuyaspis keideli Kobayashi 1936
Trilobita → Ptychopariida → Olenidae
†Jujuyops Baldis and Blasco 1976 uredi
Trilobita → Phacopida → Calmoniidae Juliaspis, Juraspis, Juriietella,