Echinocyamidae
| Echinocyamidae Temporal range: Miocene to Recent
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|---|---|
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| Echinocyamus pusillus | |
| Scientific classification | |
| Kingdom: | Animalia
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| Phylum: | Echinodermata
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| Class: | Echinoidea
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| Order: | Clypeasteroida
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| Suborder: | |
| Infraorder: | |
| Family: | Echinocyamidae Lambert & Thiéry, 1914
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| Genera | |
| |
Echinocyamidae is a family of sand dollars. They are found mostly off the coast of Britain and Ireland and the North Sea, with scattered populations in the tropics.[1][2][3]
Description[]
They are with:
- simple radial internal buttresses along interambulacral margins;
- periproct close to peristome and opening bounded by first and second paired post-basicoronal interambulacral plates
- interambulacral zones terminating adaptively in one or two single small plates
- basicoronal circlet small and unspecialized
- no
References[]
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Categories:
- Clypeasteroida
- Echinoidea stubs