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Hexacrinites
Classification
Phylum:
Echinodermata
Class:
Crinoidea
Order:
Monobathrida
Superfamily:
Hexacrinitacea
Family:
Hexacrinitidae
Formal Genus Name and Reference:
Hexacrinites Austin & AUSTIN, 1843, p. 19
Type Species:
Platycrinus interscapularis PHILLIPS, 1841, p. 28, M
Images
(Click to enlarge in a new window)
Fig. 279, la-c. *H. interscapularis (Phillips), M.Dev., Eng., aboral, ant. and post. views of theca, x1 (Austin & Austin, 1843-49), Fig. 279, 1d. H. limbatus (Müller), M.Dev., Ger., x1 (Schultze, 1867), Fig. 279, le. H. verrucosus (Dewalque), U.Dev., Belg., radial ( R ), and primaxil (PBrAx) concealed by first secundibrachs ( SBr _{\\text {I ), x2 (Ubaghs, n)
Synonyms
Hexacrinus; Platycrinus interscapularis; Triplaricrinites Goldfuss; Triplaricrinus
Geographic Distribution
U.Sil.-U.Dev., ?U.Carb. (?Penn.), W.Eu.-USSR-Sib.-China-N.Am.-?E.Australia-?New Zealand
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.Dev., ?U.Carb. (?Penn.)
Ending International Stage:
Gzhelian
Fraction Up In Ending Stage:
100
Ending Date:
298.89
Description
Primibrachs 1 or 2 in each ray, so reduced in some species as to be concealed by 1st secundibrachs which rest directly on radials, anus subcentral or marginal on tegmen. Free arms (known only in a few species) 2 in each ray, uniserial, simple or bearing ramuli on one or both sides.
References
Austin, Thomas, \& Thomas Austin Jr. 1843. XXX11l. Description of several new genera and species of Crinoidea. Annals and Magazine of Natural History History (series 1) 11REFERENCES, :195-207.
Museum or Author Information
Classification
Phylum:
Echinodermata
Class:
Crinoidea
Order:
Monobathrida
Superfamily:
Hexacrinitacea
Family:
Hexacrinitidae
Formal Genus Name and Reference:
Hexacrinites Austin & AUSTIN, 1843, p. 19
Type Species:
Platycrinus interscapularis PHILLIPS, 1841, p. 28, M
Images
(Click to enlarge in a new window)
Fig. 279, la-c. *H. interscapularis (Phillips), M.Dev., Eng., aboral, ant. and post. views of theca, x1 (Austin & Austin, 1843-49), Fig. 279, 1d. H. limbatus (Müller), M.Dev., Ger., x1 (Schultze, 1867), Fig. 279, le. H. verrucosus (Dewalque), U.Dev., Belg., radial ( R ), and primaxil (PBrAx) concealed by first secundibrachs ( SBr _{\\text {I ), x2 (Ubaghs, n)
Synonyms
Hexacrinus; Platycrinus interscapularis; Triplaricrinites Goldfuss; Triplaricrinus
Geographic Distribution
U.Sil.-U.Dev., ?U.Carb. (?Penn.), W.Eu.-USSR-Sib.-China-N.Am.-?E.Australia-?New Zealand
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.Dev., ?U.Carb. (?Penn.)
Ending International Stage:
Gzhelian
Fraction Up In Ending Stage:
100
Ending Date:
298.89
Description
Primibrachs 1 or 2 in each ray, so reduced in some species as to be concealed by 1st secundibrachs which rest directly on radials, anus subcentral or marginal on tegmen. Free arms (known only in a few species) 2 in each ray, uniserial, simple or bearing ramuli on one or both sides.
References
Austin, Thomas, \& Thomas Austin Jr. 1843. XXX11l. Description of several new genera and species of Crinoidea. Annals and Magazine of Natural History History (series 1) 11REFERENCES, :195-207.