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Isocrinida
Order of crinoids From Wikipedia, the free encyclopedia
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Isocrinida is an order of sea lilies which contains four families.
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Characteristics
Members of this order are characterised by having a "heteromorphic" stalk; the stalk consists of a series of nodes with cirri, interspersed by several nodes without cirri. There are additionally a whorl of cirri at the base on which the animal perches. The calyx is a shallow cup consisting of five basals and five radials.[2]
Families
Ordo Isocrinida[1]
- Family Balanocrinidae Roux, 1981
- Subfamily Balanocrininae Roux, 1981
- Subfamily Diplocrininae Roux, 1981
- Subfamily Isselicrininae Klikushkin, 1977
- Subfamily Proisocrininae Rasmussen, 1978
- Family Cainocrinidae Simms, 1988
- Family Isocrinidae Gislén, 1924
- Subfamily Isocrininae Gislén, 1924
- Subfamily Metacrininae Klikushin, 1977
- Family †Pentacrinitidae Gray, 1842
- Subfamily Eocomatulinae Simms, 1988
- Subfamily Pentacrinitinae Blumenbach, 1804
Endoxocrinus parrae (Balanocrinidae)
Isocrinus asteria
Isocrinus fossil, Shamshak Formation, Alborz province, Iran
Neocrinus decorus (Balanocrinidae)
Proisocrinus ruberrimus (Balanocrinidae)
Endoxocrinus sp. (Balanocrinidae)
Unidentified Isocrinid
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References
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