Hyocrinidae

Hyocrinidae is a family of echinoderms, the only family in the order Hyocrinida.

Characteristics

Members of this order have long slender stems consisting of a large number of identical columnar units. There are no cirri, and the basal disc of the stem attaches directly to the substrate. The calyx is globular or conical, and consists of five widely-spaced, undivided arms attached to five radial ossicles.

Distribution

Most hyocrinids are found at depths below, in the range, in all the ocean basins and on seamounts.

Genera

Genera:Ailsacrinus Mironov & Sorokina, 1998Anachalypsicrinus AM Clark, 1973Belyaevicrinus Calamocrinus Agassiz, 1890Camaecrinus Mironov & Sorokina, 1998Chambersaecrinus Mironov & Sorokina, 1998Dumetocrinus Mironov & Sorokina, 1998Feracrinus Mironov & Sorokina, 1998Gephyrocrinus Koehler & Bather, 1902Hyocrinus Thomson, 1876Lamberticrinus Roux, 2017Laubiericrinus Roux, 2004Parahyocrinus Roux, 2017Ptilocrinus Clark, 1907Thalassocrinus Clark, 1911Tiburonicrinus Roux, 2017