''Echinodiscus'' is a genus of
sand dollars
Sand dollars (also known as a sea cookie or snapper biscuit in New Zealand, or pansy shell in South Africa) are species of flat, burrowing sea urchins belonging to the Order (biology), order Clypeasteroida. Some species within the order, not qui ...
within the family
Astriclypeidae
Astriclypeidae is a family of echinoderms belonging to the order Clypeasteroida
Sand dollars (also known as a sea cookie or snapper biscuit in New Zealand, or pansy shell in South Africa) are species of flat, burrowing sea urchins belonging to ...
. There are currently 14 species assigned to the genus, with a majority being
extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
.
Species
* ''
Echinodiscus andamanensis''
* ''
Echinodiscus bisperforatus''
* †''
Echinodiscus chikuzenensis''
* †''
Echinodiscus colchesterensis''
* †''
Echinodiscus ellipticus''
* †''
Echinodiscus formosus''
* †''
Echinodiscus ginauensis''
* †''
Echinodiscus hsianglanensis''
* †''
Echinodiscus pedemontanus''
* †''
Echinodiscus placenta''
* †''
Echinodiscus tiliensis''
* †''
Echinodiscus transiens''
* ''
Echinodiscus truncatus''
* †''
Echinodiscus yeliuensis''
References
Astriclypeidae
Echinoidea genera
{{echinoidea-stub