The British Silurian Crinoidea

ABSTRACT In Part 3, we describe the British Silurian crinoids of the subclass Camerata, including the orders Diplobathrida (five genera, nine species) and Monobathrida (12 genera, 34 species), and morphotaxa based on disarticulated columnals and pluricolumnals (four morphogenera, nine morphospecies), including those taxa left in open nomenclature. Six new nominal species of monobathrid are described, namely the periechocrinid Periechocrinus? bulbosus (Ramsbottom MS) sp. nov., the carpocrinids Carpocrinus verminosus Widdison sp. nov. and Carpocrinus ramsbottomi Widdison sp. nov., the eucalyptocrinitids Calliocrinus rugiferus (Ramsbottom MS) sp. nov. and Eucalyptocrinites aberrans Widdison sp. nov., and the hapalocrinid Cordylocrinus rugobrachialis (Ramsbottom MS) sp. nov. A new crinoid columnal morphospecies is named Floricolumnus (col.) lefewi Donovan sp. nov. In an addendum to Part 2, the dendrocrinid 'Dendrocrinus' obscurus sp. nov. is described (Middle Llandovery Newlands Farm Formation, Ayrshire). About 120 species of crinoid are identified from the Silurian of the British Isles including those in open nomenclature and columnal morphotaxa. Over half are known from the Much Wenlock Limestone Formation of Dudley, Worcestershire.