The British Silurian Crinoidea

Monographs of the Palaeontographical Society Pub Date : 2010-12-31 DOI:10.1080/25761900.2022.12131815

S. Donovan, Rosanne E. Widdison, D. N. Lewis, F. E. Fearnhead

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引用次数: 1

Abstract

ABSTRACT In Part 2, we describe the dicyclic non-camerate crinoids, the Cladida, including three orders, the Cyathocrinida (five genera, 15 species, excluding Crotalocrinites pulcher (Hisinger)), Dendrocrinida (six genera, 15 species) and Flexibilia (13 genera, 17 species), including those taxa left in open nomenclature; two further species are incerti ordinis. One new genus is erected, the crotalocrinitid Pleuroptyx Widdison gen. nov., type species Apiocrinites? punctatus Hisinger. Five new nominal species are described, namely the cyathocrinitid Cyathocrintes? fonei sp. nov. and the crotalocrinitid Crotalocrinites enodis Widdison sp. nov. (both from the Much Wenlock Limestone Formation of the Dudley area), and the dendrocrinids 'Dendrocrinus' whitei sp. nov. (Upper Llandovery Hughley Shales, Shropshire), Dendrocrinus? johnphillipsi sp. nov. (Upper Ludlow Leintwardine Formation, Herefordshire) and Plicodendrocrinus brevis (Ramsbottom MS) sp. nov. (Wenlock or Ludlow, Staffordshire). In an addendum to Part 1, the calceocrinid Chirocrinus baingowardi sp. nov. is described (Lower Llandovery Mulloch Hill Sandstone Formation, Ayrshire).

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第二部分介绍了双环非相机类海鲷，包括Cladida(3目)、Cyathocrinida(5属15种，不包括Crotalocrinites pulcher (Hisinger))、Dendrocrinida(6属15种)和Flexibilia(13属17种)，包括开放命名的分类群;另外两种是无尾蛛。新建立一属，crotalocrinid Pleuroptyx Widdison gen. nov.，模式种Apiocrinites?毛虫Hisinger。描述了五个新的名义种，即cyathocrinid cyathocrtes ?fonei sp. 11和crotalocrites enodis Widdison sp. 11(均来自Dudley地区的Much Wenlock灰岩组)，以及stendrocrinus 'Dendrocrinus' whitei sp. 11 (Shropshire的Upper Llandovery Hughley页岩)，Dendrocrinus?johnphillipsi sp. 11月(赫里福德郡上勒德洛Leintwardine组)和Plicodendrocrinus brevis (Ramsbottom MS) sp. 11月(斯塔福德郡文洛克或勒德洛)。在第1部分的附录中，描述了钙石类Chirocrinus baingowardi sp. 11(艾尔郡下Llandovery Mulloch Hill砂岩组)。

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Monographs of the Palaeontographical Society

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