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Cyathactis
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Cyathophyllina
Family:
Ptychophyllidae
Formal Genus Name and Reference:
Cyathactis Soshkina in Ivanova et AL., 1955, p. 122
Type Species:
C. typus, OD, +759, coll. 587, PIN, Moscow
Images
(Click to enlarge in a new window)
Fig. 201,1a,b. * C. typus, holotype, Gk3, R. Stony Tunguska, a,b, transv., long. secs., X3 (Ivanova et al., 1955)
Synonyms
Geographic Distribution
Asia(Sib.Platf.)
Age Range
Beginning Stage in Treatise Usage:
M.Sil.
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
M.Sil.
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Solitary, fossula on convex side or somewhat displaced sideways, may invade dissepimentarium, cardinal septum short, septa thin in all stages, numerous, long, major septa more or less attaining axis and not convolute, minor septa may be contratingent, tabular floors convex with broad, shallow median depression, tabulae incomplete, dissepimentarium wide with numerous subglobose dissepiments, declined adaxially
References
Museum or Author Information
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Cyathophyllina
Family:
Ptychophyllidae
Formal Genus Name and Reference:
Cyathactis Soshkina in Ivanova et AL., 1955, p. 122
Type Species:
C. typus, OD, +759, coll. 587, PIN, Moscow
Images
(Click to enlarge in a new window)
Fig. 201,1a,b. * C. typus, holotype, Gk3, R. Stony Tunguska, a,b, transv., long. secs., X3 (Ivanova et al., 1955)
Synonyms
Geographic Distribution
Asia(Sib.Platf.)
Age Range
Beginning Stage in Treatise Usage:
M.Sil.
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
M.Sil.
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Solitary, fossula on convex side or somewhat displaced sideways, may invade dissepimentarium, cardinal septum short, septa thin in all stages, numerous, long, major septa more or less attaining axis and not convolute, minor septa may be contratingent, tabular floors convex with broad, shallow median depression, tabulae incomplete, dissepimentarium wide with numerous subglobose dissepiments, declined adaxially