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WoRMS taxon details
basis of record
Hess H. (2011). Isocrinida. <em>In: Hess, H., Messing, C.G., Ausich, W.I. (Eds.), Treatise on Invertebrate Paleontology, Part T, Echinodermata 2 Revised, Crinoidea, vol. 3. University of Kansas Press, Lawrence, Kansas.</em> 42–69. [details]
additional source
Hansson, H.G. (2001). Echinodermata, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i>. 50: pp. 336-351. (look up in IMIS) [details]
 Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Diagnosis Articulata with cup cryptodicyclic, wider than high, low cone- or bowl-shaped; radial cavity wide, cup elements not extremely thick. Basals commonly much lower than radials. Radial articular facet directed outward, muscle fossae large but may be small in Lower Jurassic Pentacrinitina. Axial canals between brachials single. Columnal articula petaloid. [details]
Taxonomy "Subdividing the Isocrinida has been highly controversial. Bourseau and Roux (1989) and Bourseau and others (1991) treated the isocrinids as a homogeneous group classified as the family Pentacrinidae d’Orbigny. They rejected the notion of 2 families, the uniquely fossil Pentacrinidae (with Seirocrinus and Pentacrinites) and the Isocrinidae (including the living representatives); thus, they also rejected a classification of Isocrinida into 2 suborders (Pentacrinitina and Isocrinina). The pentacrinitids, herein classified in the suborder Pentacrinitina, differ by some easily recognizable characters from isocrinids classified in the suborder Isocrinina, such as endotomous arm branching, highly cirriferous columns with laterally compressed cirri, and columnal articular facets with a distinctive pattern. Isocrinines, on the other hand, constitute a rather homogeneous group subdivided by relatively minor character differences." (Hess 2011, p. 42) [details]From regional or thematic species database
Diagnosis Aboral cup cryptodicyclic and poorly individualized forming a gradual transition between stalk and crown; heteromorphic stalk, columnals articulated by symplexies with pentalobate ligament areas, nodals bearing cirri usually with distal cryptosymplexy. [details]
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