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Desmidocrinus
Classification
Phylum:
Echinodermata
Subphylum:
Crinozoa
Class:
Crinoidea
Subclass:
Camerata
Order:
Monobathrida
Suborder:
Compsocrinina
Superfamily:
Carpocrinacea
Family:
Carpocrinidae
Formal Genus Name and Reference:
Desmidocrinus ANGELIN, 1878, p. 5
Type Species:
D. pentadactylus, SD SPRINGER, 1926a, p. 43
Images
(Click to enlarge in a new window)
Fig. 272, 1. *D. pentadactylus, Sweden (Gotl.), 1a, B-ray view of complete crown with short part of attached stem (Stockholm Museum Ec. 11366), x1.5 (Ubaghs, n), 1 b, C D-interray view of incomplete crown (Stockholm Museum Ec. 11377), x1.5 (Ubaghs, n), 1 c , plate diagram of part of calyx (radials black, anals and interbrachials stippled) (Ubaghs, n).
Synonyms
Geographic Distribution
U.Sil., Eu.-?N.Am. [American species referred to this genus differ markedly from typical representatives found in Europe.]
Age Range
Beginning Stage in Treatise Usage:
U.Sil.
Beginning International Stage:
Gorstian
Fraction Up In Beginning Stage:
0
Beginning Date:
426.74
Ending Stage in Treatise Usage:
U.Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Calyx conical to cyathiform, basals equal or unequal, fixed tertibrachs present in all species and quartibrachs in some, fixed portions of rays isotomously or heterotomously branched, interbrachial areas composed of few plates, mostly small and very narrowly connected with tegmen, 1st interprimibrachs large, C D interray wider than others, with nonridged median series of 4 or 5 anal plates passing to tegmen. Free arms 3 to 12 (ordinarily 3 to 8 ) in each ray, composed of extremely short brachials arranged in zigzag. Nudinodals concealing internodals at least in proximal portion of stem, axial canal small, pentalobate in cross section.
References
Angelin, N. P. 1878. Iconographia crinoideorum in stratis Sueciae Siluris fossilium. Samson \& Wallin. Holmiae. 62 p., 29 pl.
Museum or Author Information
Classification
Phylum:
Echinodermata
Subphylum:
Crinozoa
Class:
Crinoidea
Subclass:
Camerata
Order:
Monobathrida
Suborder:
Compsocrinina
Superfamily:
Carpocrinacea
Family:
Carpocrinidae
Formal Genus Name and Reference:
Desmidocrinus ANGELIN, 1878, p. 5
Type Species:
D. pentadactylus, SD SPRINGER, 1926a, p. 43
Images
(Click to enlarge in a new window)
Fig. 272, 1. *D. pentadactylus, Sweden (Gotl.), 1a, B-ray view of complete crown with short part of attached stem (Stockholm Museum Ec. 11366), x1.5 (Ubaghs, n), 1 b, C D-interray view of incomplete crown (Stockholm Museum Ec. 11377), x1.5 (Ubaghs, n), 1 c , plate diagram of part of calyx (radials black, anals and interbrachials stippled) (Ubaghs, n).
Synonyms
Geographic Distribution
U.Sil., Eu.-?N.Am. [American species referred to this genus differ markedly from typical representatives found in Europe.]
Age Range
Beginning Stage in Treatise Usage:
U.Sil.
Beginning International Stage:
Gorstian
Fraction Up In Beginning Stage:
0
Beginning Date:
426.74
Ending Stage in Treatise Usage:
U.Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Calyx conical to cyathiform, basals equal or unequal, fixed tertibrachs present in all species and quartibrachs in some, fixed portions of rays isotomously or heterotomously branched, interbrachial areas composed of few plates, mostly small and very narrowly connected with tegmen, 1st interprimibrachs large, C D interray wider than others, with nonridged median series of 4 or 5 anal plates passing to tegmen. Free arms 3 to 12 (ordinarily 3 to 8 ) in each ray, composed of extremely short brachials arranged in zigzag. Nudinodals concealing internodals at least in proximal portion of stem, axial canal small, pentalobate in cross section.
References
Angelin, N. P. 1878. Iconographia crinoideorum in stratis Sueciae Siluris fossilium. Samson \& Wallin. Holmiae. 62 p., 29 pl.