Key: Step 1. Major groups with keys

Acantharia
Key to families
and species

Step 2. Acantharia
Step 58. Radiolaria Phaeodaria

Tintinnoinea
Key to genera

Step 87. Tintinnoinea
Step 128. Cnidaria

Nemertina
Key to families
and species

Step 358. Nemertina

Polychaeta
Family keys
to species

Step 368. Polychaeta

Cephalopoda: young stages
Keys to families

Step 401. Cephalopoda
Step 443. Crustacea
Step 1719. Chaetognatha

Foraminifera
IdentifyIt key

Step 1755
Decision path