Hemiasteridae is a family of
echinoderms
An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea li ...
belonging to the order
Spatangoida
The heart urchins or Spatangoida are an order of sea urchins.
Their body is a somewhat elongated oval in form, and is distinguished by the mouth being placed towards one end of the animal, and the anus towards the other. As a result, heart urc ...
.
Genera
Genera:
* ''
Bolbaster''
Pomel, 1869
* ''
Cheopsia''
Fourtau, 1909
* ''
Hemiaster''
Agassiz, 1847
References
Spatangoida
Echinoderm families
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