Gordon, C.M.; Donovan, S.K.
Author Affiliation, Ana.
Geography and Geology; Faculty of Pure and Applied Sciences
Some fossil echinoids (Echinodermata) from the Neogene of St. Croix, U.S. Virgin Islands
Caribbean Journal of Science
Date of Publication
Most Caribbean islands have a fossil echinoid fauna apparently dominated by irregulars, but undoubtedly biased by taphonomic effects and selective collecting. The late Cenozoic echinoid fauna of St. Croix, determined from disarticulated plates and spines (mainly radioles in thin sections), includes Prionocidaris sp. cf. P. clevei (Cotteau), indeterminate cidaroids and diadematoids , and incertae sedis. The species P. clevei is known from the Miocene while P. sp. cf. P. clevei is Pliocene. Fossil diadematoids are reported from an Antillean island outside Jamaica for the first time and may have formed a hitherto unnoticed but important component of ancient Caribbean ecosystems. The apparent dominance of regular echinoid radioles in St. Croix is probably strongly influenced by concentrating on thin section studies; radioles of irregular echinoids are somewhat smaller and much less obvious.....