WoRMS taxon details

Isocrinida

123095  (urn:lsid:marinespecies.org:taxname:123095)

Sieverts-Doreck, 1952
accepted
Order
Isocrinina · unaccepted > superseded rank

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  1. Family Balanocrinidae Roux, 1981
  2. Family Cainocrinidae Simms, 1988
  3. Family Isocrinidae Gislén, 1924
  4. Suborder Isocrinina accepted as Isocrinida (unaccepted > superseded rank)
  5. Family Isselicrinidae Klikushin, 1977 accepted as Isselicrininae Klikushin, 1977 (unaccepted > superseded rank)
  6. Family Proisocrinidae Rasmussen, 1978 accepted as Proisocrininae Rasmussen, 1978 (unaccepted > superseded rank)
marine, brackish, fresh, terrestrial
recent + fossil
Not documented
Taxonomy "Subdividing the Isocrinida has been highly controversial. Bourseau and Roux (1989) and Bourseau and others (1991) treated...  
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]
Messing, C.; Gondim, A.I.; Markello, K.; Poatskievick Pierezan, B.; Taylor, K.; Eléaume, M. (2024). World List of Crinoidea. Isocrinida. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=123095 on 2024-02-22
Date
action
by
2004-12-21 15:54:05Z
created
2007-10-10 10:44:33Z
changed
2007-10-10 10:48:29Z
changed
2009-08-20 19:35:45Z
changed

Creative Commons License The webpage text is licensed under a Creative Commons Attribution 4.0 License


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]
LanguageName 
Japanese ゴカクウミユリ目  [details]