original description
Clark, A. H. (1911). Thalassocrinus, a new genus of stalked crinoids from the East Indies. <em>Proceedings of the U.S. National Museum.</em> 39:473-476. [details]
basis of record
Hess H. (2011). Hyocrinida. <em>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.</em> 172–179. [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Diagnosis Hyocrinidae with basals 3 or fused. The most frequent proximal arm pattern with second nonmuscular articulation between brachials 4 and 5, third synostosis between brachials 6 and 7, no series of 3 or more brachials united by synostoses before brachial 10. (In middle part of arm of T. pontifer, muscular articulations regularly follow pair of brachials joined by synostosis). First pinnule on brachial 5; each pinnular with 2 to 2.5 pairs of cover plates. Well-developed oral and anal cones. Number of tegminal plates >10 in each interradius. Proximal columnals hexagonal or hexalobate, columnals of mesistele hexagonal. Symplexies with 6-7 crenular units of 1-3 crenulae each. [details]From other sources
Habitat Known from seamounts and knolls [details]