The Echinoid Directory

Family Corystusidae Foster & Philip, 1978, p. 792

[Corystidae Foster & Philip 1978, non Corystidae Samouelle, 1819 (Crustacea)]

Diagnosis	Urechinine holasteroids with: thick-shelled test; pore-pairs double throughout; episternal plates symmetrically placed behind sternal plate and followed by single rostral plate; subanal fasciole surrounding rostral plate.
Range	Palaeocene to Recent; Indo-Pacific.
Remarks	Name changed to Corystusidae by the International Commision on Zoological Nomenclature opinion 2238 (case 3419), December, 2009.

Diagnosis

Urechinine holasteroids with:

thick-shelled test;
pore-pairs double throughout;
episternal plates symmetrically placed behind sternal plate and followed by single rostral plate;
subanal fasciole surrounding rostral plate.

Range

Palaeocene to Recent; Indo-Pacific.

Remarks

Name changed to Corystusidae by the International Commision on Zoological Nomenclature opinion 2238 (case 3419), December, 2009.