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Pentametrocrinidae

provided by wikipedia EN

Pentametrocrinidae is a family of echinoderms belonging to the order Comatulida.[1]

Genera:[1]

References

  1. ^ a b "Pentametrocrinidae". www.gbif.org. Retrieved 13 June 2021.
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Pentametrocrinidae: Brief Summary

provided by wikipedia EN

Pentametrocrinidae is a family of echinoderms belonging to the order Comatulida.

Genera:

Pentametrocrinus Clark, 1908 Thaumatocrinus Carpenter, 1883
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Description

provided by World Register of Marine Species
A deep-sea family of Comatulida with the cirri consisting of very elongated segments, usually about four times as long as broad; no division seris, there being either five radials ond five simple arms, or ten radials and ten arms; the joint between the first two post-radial ossicles not a syzygy (this distinuishes Pentametrocrinus from the similarly five-armed Eudiocrinidae); oral pinnules without comb-like tips, all the pinnules rounded in cross-section and without conspicuous side and covering plates; sacculi present. Clark & Courtman-Stock, 1976 <554>.
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bibliographic citation
MASDEA (1997).
contributor
Edward Vanden Berghe [email]
contributor
Edward Vanden Berghe [email]

Diagnosis

provided by World Register of Marine Species
Antedonoidea with five (Pentametrocrinus) or ten (Thaumetocrinus) undivided arms. Synarthry between brachials 1-2. Syzygy between brachials 4-5 and distally at variable intervals (2 to 13). First pinnule on brachial 2 or in most Pentametrocrinus on brachial 5.
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cc-by-4.0
copyright
WoRMS Editorial Board
bibliographic citation
MASDEA (1997).
contributor
Charles Messing [email]
contributor
Charles Messing [email]