Taxonomy Tournament: Echinoderms
Echinacea. This superorder of sea urchins in the largest. They have a rigid test, hard spines, and gills.
Gnathostomata. This superorder of sea urchins are irregularly shaped and adapted for burrowing in soft-bottomed marine environments. Members include the sand dollar
Which clade of animals is better?
Echinacea
Gnathostomata
Show results














