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| Donovan, S.K.; Lewis, D.N.. |
| The specific diversity of fossil crinoids from the Much Wenlock Limestone Formation at Dudley, Worcestershire, and in Shropshire differ by an order of magnitude. The latter are relatively depauperate and include only about six nominal species. Over 165 years ago, a specimen from Coalbrookdale, Shropshire, was identified as Cyathocrinites tuberculatus Miller (= the taxocrinid flexible Protaxocrinus tuberculatus (Miller)). This specimen, although indifferently preserved, is distinct from other Silurian crinoids of the British Isles and is described herein as a monobathrid camerate, Macrostylocrinus? jefferiesi sp. nov. This species has a moderately large, conical dorsal cup with at least 20 arms, broad primibrachials, a granular surface sculpture and no ray... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Systematics; Crinoids; Macrostylocrinus; Wenlock; Silurian; England; 42.72; 38.22. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/314207 |
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| Donovan, S.K.; Portell, R.W.; Veltkamp, C.J.. |
| Despite being diverse globally, Miocene echinoids are poorly known from Jamaica. Moderately diverse echinoids and other echinoderms have been identified mainly from fragmentary specimens collected from chalks and mass-flow deposits of the Lower Miocene Montpelier Formation, White Limestone Group, near Duncans, parish of Trelawny. This locality has yielded the most diverse association of fossil echinoderms known from the Miocene of Jamaica, including at least ten species in four classes. This fauna is comprised of the isocrinid crinoids Neocrinus sp. cf. N. decorus (Wyville Thomson) and Isocrinus sp.; the ophiuroid Ophiomusium? sp.; the asteroids Astropecten? spp.; and the echinoids Prionocidaris? sp., Histocidaris sp., Echinometra sp. cf. E. lucunter... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Systematics; Crinoids; Asteroids; Ophiuroids; Echinoids; Neogene; Caribbean; 42.72. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/210104 |
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