Subclass

Euechinoidea (Sea urchins)

Strongylocentrotus purpuratus. Photo: (c) Robby Deans, some rights reserved (CC BY-NC)

The subclass Euechinoidea includes almost all living species of sea urchin, and fossil forms going back as far as the Triassic.

— Wikipedia

Subtaxa

Where in Humboldt



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