dcsimg

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>.
license
cc-by-4.0
copyright
WoRMS Editorial Board
bibliographic citation
MASDEA (1997).
i18n: 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.
license
cc-by-4.0
copyright
WoRMS Editorial Board
bibliographic citation
MASDEA (1997).
i18n: Contributor
Messing, Charles, C.G.