| Paleozoic | Mesozoic | Cenozoic | Recent | |
|---|---|---|---|---|
| Arthropoda | PA | MA | CA | RA |
| Brachiopoda | PB | MB | CB | RB |
| Bryozoa | PB | MB | CB | RB |
| Cnidaria | PC | MC | CC | RC |
| Echinodermata | PE | ME | CE | RE |
| Foraminifera | PF | MF | CF | RF |
| Hemichordata | PH | MH | CH | RH |
| Mollusca | PM | MM | CM | RM |
| Bivalvia | PM | MM | CM | RM |
| Cephalopoda | PM | MM | CM | RM |
| Gastropoda | PM | MM | CM | RM |
| Monoplacophora | PM | MM | CM | RM |
| Rostroconchia | PM | MM | CM | RM |
| Scaphopoda | PM | MM | CM | RM |
| Plantae | PP | MP | CP | RP |
| Porifera | PS | MS | CS | RS |
| Vertebrate (Chordata) | PV | MV | CV | RV |
| Annelida | PW | MW | CW | RW |
| Others | PW | MW | CW | RW |
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