WoRMS banner
Add search provider Add provider
Twitter: Latest updates @WRMarineSpecies

WoRMS taxon details

Checked: verified by a taxonomic editorHyocrinida 
AphiaID: 246674

Classification: Biota > Checked: verified by a taxonomic editorAnimalia (Kingdom) > Checked: verified by a taxonomic editorEchinodermata (Phylum) > Unreviewed: has not been verified by a taxonomic editorCrinozoa (Subphylum) > Unreviewed: has not been verified by a taxonomic editorCrinoidea (Class) > Checked: verified by a taxonomic editorArticulata (Subclass) > Checked: verified by a taxonomic editorHyocrinida (Order)
Authority (Rasmussen, 1978)
Status accepted
Rank Order
Parent Checked: verified by a taxonomic editorArticulata
  Unreviewed: has not been verified by a taxonomic editorHyocrinina
Source  basis of record Hess H. (2011). Hyocrinida. In: Hess H, Messing CG, Ausich WI (Eds.), Treatise on Invertebrate Paleontology, Part T, Echinodermata 2 Revised, Crinoidea, vol. 3. University of Kansas Press, Lawrence, Kansas. 172–179. [details]

Direct child
taxa (1)
 Family Checked: verified by a taxonomic editorHyocrinidae Carpenter, 1884
Environment marine, brackish, fresh, terrestrial
Fossil range recent + fossil
Link Unreviewed: has not been verified by a taxonomic editorTo GenBank  
From editor or global species database
Checked: verified by a taxonomic editorDiagnosis Articulata with cup thin walled, hollow, formed by basals and radials; infrabasals absent; basals fused or with 1 to 3 sutures. Radials 5, separated by distinct sutures. Arms undivided, except in Calamocrinus, where the first division occurs between brachials 8 to 15, first division never at primibrachial 2. Arms branch exceptionally at brachial 4 in Dumetocrinus and Gephyrocrinus. Arms considerably narrower than radials, completely separated laterally; radial articular facet narrower than width of ossicle. Nonmuscular articulations smooth synostosial), primibrachials 1 and 2 united by synostosis. First pinnule on brachials 2 to 6. Tegmen covered by small polygonal plates. Column homeomorphic, long, slender, without nodals or cirri. Columnal articulations typically symplectial proximally with radiating crenulae, grouped in more than 5 crenular units (except in Laubiericrinus, the only genus with pentamerous symplexies); symplexies sometimes with areolar depressions or piercings. Facets of distal columnals tending to reduced or densely arranged vermicular crenulae, commonly with juvenile symplectial pattern around lumen. Attachment to substrate by expanded terminal disk, no radix. [details]
LSID urn:lsid:marinespecies.org:taxname:246674
Edit history
Date   action   by
2007-10-10 11:56:07Z  created  Messing, Charles
2009-08-20 19:35:45Z  changed  Messing, Charles
2013-01-01 04:19:43Z  changed  Messing, Charles
2013-01-01 17:25:02Z  changed  Messing, Charles
[Taxonomic tree] [List Species] [Occurrence map] [Google] [Google scholar] [Google images]
  Citation: Messing, C. (2013). Hyocrinida. In: Messing, C. (2017). World List of Crinoidea. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=246674 on 2017-10-20
  Creative Commons License The webpage text is licensed under a Creative Commons Attribution 4.0 License