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  2. Crinoid - Wikipedia

    en.wikipedia.org/wiki/Crinoid

    Crinoids are echinoderms in the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. [5] They live in both shallow water [6] and in depths of over 9,000 metres (30,000 ft). [7] Adult crinoids are characterised by having the mouth located on the upper surface.

  3. Pentacrinites - Wikipedia

    en.wikipedia.org/wiki/Pentacrinites

    Pentacrinites is an extinct genus of crinoids that lived from the Hettangian to the Bathonian of Asia, Europe, North America, and New Zealand.Their stems are pentagonal to star-shaped in cross-section and are the most commonly preserved parts. [1]

  4. Bourgueticrinida - Wikipedia

    en.wikipedia.org/wiki/Bourgueticrinida

    Bourgueticrinida is an order of crinoids that typically live deep in the ocean. Members of this order are attached to the seabed by a slender stalk and are known as sea lilies . While other groups of crinoids flourished during the Permian, bourgueticrinids along with other extant orders did not appear until the Triassic , following a mass ...

  5. Cladida - Wikipedia

    en.wikipedia.org/wiki/Cladida

    Cladida is a major subgroup of crinoids with a complicated taxonomic history. Cladida was originally applied to a wide assortment of extinct crinoids with a dicyclic calyx. Under this original definition, cladids would represent a paraphyletic order ancestral to several other major crinoid groups, particularly the living Articulat

  6. Pentacrinoidea - Wikipedia

    en.wikipedia.org/wiki/Pentacrinoidea

    Pentacrinoidea is a subclass of crinoids containing all members of Crinoidea except for the exclusively Paleozoic camerates (subclass Camerata).It was originally named in 1918 by Otto Jaekel, who hypothesized a fundamental split between camerate and non-camerate crinoids. [1]

  7. Cyathocrinites - Wikipedia

    en.wikipedia.org/wiki/Cyathocrinites

    Cyathocrinites is an extinct genus of crinoids that lived from the Early Silurian to the Late Permian in Europe and North America. Sources

  8. Agaricocrinus americanus - Wikipedia

    en.wikipedia.org/wiki/Agaricocrinus_americanus

    Like extant crinoids, Agaricocrinus americanus was anchored to a hard surface by a holdfast out of which grew an articulated stalk. On top of this was a calyx with a number of feather-like arms. Each arm bore short branches known as pinnules and from these cirri were extended which sifted plankton from the water flowing past.

  9. Scyphocrinus - Wikipedia

    en.wikipedia.org/wiki/Scyphocrinus

    Scyphocrinus, is an extinct genus of crinoids.Species belonging to this genus lived during the Silurian and Devonian periods (from 443.4 to 358.9 Ma). [1] [2]The crinoid genus Camarocrinus have been considered by some authors the bulbous distal end of the stem of Scyphocrinus, having the function of a root and fixing the crinoid to the sea button.