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Arachnastraea
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Lithostrotionina
Family:
Lithostrotionidae
Subfamily:
Yatsengiinae
Formal Genus Name and Reference:
Arachnastraea Yabe & HAYASAKA, 1916, p.67
Type Species:
A. manchurica, OD, ?syntype 8291, TohU, Sendai, metatype, R23722, BM(NH), London
Images
(Click to enlarge in a new window)
FIG. 257,la,b. *A. manchuIrica, metatrpe, Penchi Ser., S. Manchuria, Hon-kei-ko coalfield; a,b, transv., long. sees., X2.0
(photographs courtesy British' Museum (Natural History), London). --Fig. 257,1c,d. A. molli (SHTUKENBERG), Mrachkovo horizon, right bank of R. Moskva, quarry opposite Sonino; c,d, transv., long. secs., X 2.0 (Dobrolyubova, 1935).
Synonyms
Cystophorastraea
Geographic Distribution
Eu.(Moscow Basin-Donbas- ?Spain)-Asia(Manchuria-Korea-Kiangsu-Shantung)
Age Range
Beginning Stage in Treatise Usage:
U.Carb.
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
U.Carb.
Ending International Stage:
Gzhelian
Fraction Up In Ending Stage:
100
Ending Date:
298.89
Description
Astreoid, in part thamnasterioid or aphroid, septa thin, rarely slightly thickened, meeting conjoined counter and cardinal septa, which are only faintly thickened axially to suggest median plate; tabulae conical, complete or commonly with auxiliary axial tabellae; dissepimentarium regular; cardinal fossula indistinct [YABE & EGUCHI, 19H, p. 733].
References
Museum or Author Information
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Lithostrotionina
Family:
Lithostrotionidae
Subfamily:
Yatsengiinae
Formal Genus Name and Reference:
Arachnastraea Yabe & HAYASAKA, 1916, p.67
Type Species:
A. manchurica, OD, ?syntype 8291, TohU, Sendai, metatype, R23722, BM(NH), London
Images
(Click to enlarge in a new window)
FIG. 257,la,b. *A. manchuIrica, metatrpe, Penchi Ser., S. Manchuria, Hon-kei-ko coalfield; a,b, transv., long. sees., X2.0
(photographs courtesy British' Museum (Natural History), London). --Fig. 257,1c,d. A. molli (SHTUKENBERG), Mrachkovo horizon, right bank of R. Moskva, quarry opposite Sonino; c,d, transv., long. secs., X 2.0 (Dobrolyubova, 1935).
Synonyms
Cystophorastraea
Geographic Distribution
Eu.(Moscow Basin-Donbas- ?Spain)-Asia(Manchuria-Korea-Kiangsu-Shantung)
Age Range
Beginning Stage in Treatise Usage:
U.Carb.
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
U.Carb.
Ending International Stage:
Gzhelian
Fraction Up In Ending Stage:
100
Ending Date:
298.89
Description
Astreoid, in part thamnasterioid or aphroid, septa thin, rarely slightly thickened, meeting conjoined counter and cardinal septa, which are only faintly thickened axially to suggest median plate; tabulae conical, complete or commonly with auxiliary axial tabellae; dissepimentarium regular; cardinal fossula indistinct [YABE & EGUCHI, 19H, p. 733].