Gnathostomata (echinoid)
Superorder of sea urchins / From Wikipedia, the free encyclopedia
For the infrphylum of vertebrates, see Gnathostomata. For jaw worms, see Gnathostomulid. Not to be confused with Gnathostoma, a genus of parasitic nematodes
The Gnathostomata are a superorder of sea urchins, including the familiar sand dollars.
Quick Facts Scientific classification, Orders ...
Gnathostomata | |
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Echinocyamus pusillus (order Clypeasteroida) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Class: | Echinoidea |
Superorder: | Gnathostomata |
Orders | |
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Gnathostomatans are irregular in shape, but unlike other irregular sea urchins, possess a feeding lantern. The mouth is located in the centre of the lower surface, as it is in most other sea urchins, but the anus is found to one side of the upper surface, rather than being central. The members of the group are adapted for burrowing in soft-bottomed marine environments.