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Arachnolasma
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Aulophyllina
Family:
Aulophyllidae
Subfamily:
Dibunophyllinae
Formal Genus Name and Reference:
Arachnolasma GRABAU, 1922, p. 59
Type Species:
Lophophyllum sinense Yabe & HAYASAKA, 1920, explanation to pl. 6, fig. 2, +not traced
Images
(Click to enlarge in a new window)
Fig. 238,3a-c. * A. sinense, monotype, China, E. of Ai-chia-ping, Wei-ning-hsien, Kweichow, a-c, transv. secs., long. sec., X1.5 (Yabe & Hayasaka, 1920)
Synonyms
Arachnelasma
Geographic Distribution
Asia(Kuzbas), L.Carb. (Visean), Asia(China-Japan-Viet Nam-Kazakh.)Eu. (USSR-Pol.)-N. Afr. (Alg.)
Age Range
Beginning Stage in Treatise Usage:
L.Carb.(Tournais.)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
L.Carb.(Tournais.)
Ending International Stage:
Tournaisian
Fraction Up In Ending Stage:
100
Ending Date:
346.73
Description
Solitary, large, like Dibunophyllum but median plate of axial structure stronger, thickened spindlewise in transverse section and retaining contact longer with counter septum, also, septal lamellae of axial structure commonly shorter, weaker, and fewer.
References
Museum or Author Information
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Aulophyllina
Family:
Aulophyllidae
Subfamily:
Dibunophyllinae
Formal Genus Name and Reference:
Arachnolasma GRABAU, 1922, p. 59
Type Species:
Lophophyllum sinense Yabe & HAYASAKA, 1920, explanation to pl. 6, fig. 2, +not traced
Images
(Click to enlarge in a new window)
Fig. 238,3a-c. * A. sinense, monotype, China, E. of Ai-chia-ping, Wei-ning-hsien, Kweichow, a-c, transv. secs., long. sec., X1.5 (Yabe & Hayasaka, 1920)
Synonyms
Arachnelasma
Geographic Distribution
Asia(Kuzbas), L.Carb. (Visean), Asia(China-Japan-Viet Nam-Kazakh.)Eu. (USSR-Pol.)-N. Afr. (Alg.)
Age Range
Beginning Stage in Treatise Usage:
L.Carb.(Tournais.)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
L.Carb.(Tournais.)
Ending International Stage:
Tournaisian
Fraction Up In Ending Stage:
100
Ending Date:
346.73
Description
Solitary, large, like Dibunophyllum but median plate of axial structure stronger, thickened spindlewise in transverse section and retaining contact longer with counter septum, also, septal lamellae of axial structure commonly shorter, weaker, and fewer.