Dodatak:Abecedni popis trilobita: I

Ib

Ibexaspis,

Id

Idahoiidae, Idiorapha,

Ig

Igarkiella, Iglesiella, Ignotogregatus,

Ij

†Ijacephalus Ogienko, 1974

Trilobita → Ptychopariida → Acrocephalitidae

†Iyouella Geyer and Palmer 1995

• †Iyouella contracta Geyer & Palmer 1995

Trilobita → Redlichiida → Holmiidae

Il

Illaenacea Illaenidae, Illaenina, Illaeninae, Illaenoides, Illaenula, Illaenuridae, Illaenurus, Illaenus,

In

Iniospheniscus, Iniotoma, Inouyina, Inoyellaspis, Interalia,

Io

Iohomia, Iolgia,

Ir

Iranaspis,

†Irgitkhemia Chernysheva 1977

Animalia → Arthropoda → Trilobita → Redlichiida Irinia, Irvingelloides,

Is

Isabelinia,

†Isbergia Warburg 1925

• †Isbergia planifrons Warburg 1925

Trilobita → Proetida → Aulacopleuroidea → Rorringtoniidae → Rorringtoniinae Ishpella, Isocolidae, Isotelinae, Isoteloides, Isotelus, Issafenia, Issafeniella, Isyrakopeltis,

It

Itagnostus, Ityophoridae, Ityophorus,

Iv

Iveria,

Iw

Iwayaspis,

Iy

†Iyouella Geyer and Palmer 1995

• †Iyouella contracta Geyer & Palmer 1995

Trilobita → Redlichiida → Holmiidae