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

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dc.contributor.authorDonovan, S.K.
dc.contributor.authorJones, B.
dc.contributor.authorHarper, D.A.T.
dc.date.accessioned2025-05-01T12:13:36Z
dc.date.available2025-05-01T12:13:36Z
dc.date.issued2015-01-01
dc.descriptionThe 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.
dc.identifier.doihttps://doi.org/10.7939/R39S1M14S
dc.language.isoen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectBiodiversity
dc.subjectBrissus
dc.subjectSystematics
dc.subjectClypeaster
dc.subjectSchizaster
dc.subjectMiocene
dc.subjectPleistocene
dc.titleNeogene echinoids from the Cayman Islands, West Indies, regional implications.
dc.typehttp://purl.org/coar/resource_type/c_6501 http://purl.org/coar/version/c_970fb48d4fbd8a85
ual.jupiterAccesshttp://terms.library.ualberta.ca/public

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