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Neogene echinoids from the Cayman Islands, West Indies: regional implications

Donovan, S.K.; Jones, B.; Harper, D.A.T.


S.K. Donovan

B. Jones


The first fossil echinoids are recorded from the Cayman Islands. A regular echinoid, Arbacia? sp., the spatangoids Brissus sp. cf. B. oblongus Wright and Schizaster sp. cf. S. americanus (Clark), and the clypeasteroid Clypeaster sp. are from the Middle Miocene Cayman Formation. Test fragments of the mellitid clypeasteroid, Leodia sexiesperforata (Leske), are from the Late Pleistocene Ironshore Formation. Miocene echinoids are preserved as (mainly internal) moulds; hence, all species are left in open nomenclature because of uncertainties regarding test architecture. All Miocene taxa are recorded from single specimens apart from the 27 assigned to Brissus. Schizaster sp. cf. S. americanus (Clark) is compared to a species from the Oligocene of the south-east USA. Brissus sp. cf. B. oblongus is close in gross morphology to a taxon from the Miocene of Malta. Leodia sexiesperforata is identified from fragments with confidence, being the only extant Antillean sand dollar with elongate ambulacral petals that is limited to carbonate substrates. The Miocene echinoids of Grand Cayman, although of limited diversity, are mainly comprised of genera common in comparable mid-Cenozoic carbonate environments.


Donovan, S., Jones, B., & Harper, D. (2016). Neogene echinoids from the Cayman Islands, West Indies: regional implications. Geological Journal, 51(6), 864-879.

Journal Article Type Article
Acceptance Date Jun 8, 2015
Online Publication Date Sep 2, 2015
Publication Date 2016-11
Deposit Date Sep 4, 2015
Journal Geological Journal
Print ISSN 0072-1050
Electronic ISSN 1099-1034
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 51
Issue 6
Pages 864-879