Echinoidea - Cidaroida - Cidaridae

Alternative combination: Cidaris (Eucidaris) thouarsii galapagensis

Belongs to Eucidaris thouarsii according to U. S. Grant and L. G. Hertlein 1938

Sister taxa: none

Ecology: slow-moving low-level epifaunal grazer-omnivore

Distribution: found only at CAS Loc. 27250, South Seymour Island (Quaternary of Ecuador)

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