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Postabdominal claw with distinct proximal (p) pecten

Ocellus (oc) round or rhomboidal

Vertex (v) with obtuse or rounded angle

 

All teeth on postabdominal claw of similiar length

Ocellus (oc) triangular or rhomboidal

Vertex (v) spinous

 

All teeth on postabdominal claw of similiar length

Ocellus (oc) elongated

Vertex (v) rounded

 
Taxonomy
Phylum Arthropoda
Subphylum Crustacea
Class Branchiopoda
Suborder Cladocera
Family Daphniidae
Genus Simocephalus