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Rylstonia
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Aulophyllina
Family:
Aulophyllidae
Subfamily:
Amygdalophyllinae
Formal Genus Name and Reference:
Rylstonia Hudson & PLATT, 1927, p. 39
Type Species:
R. benecompacta, OD, †R25563, BM(NH), London
Images
(Click to enlarge in a new window)
Fig. 234,2a-d. *R. benecompacta, Visean, Skelterton Ls., Yorkshire, Clints Quarry near Rylstone, a, transv. sec., X2.0, b, c, transv. secs., X1.5, d, another specimen, long. sec., X1.5 (Hudson& Platt, 1927). --Fig. 234,2e,!. R. !allax (HUDSON & ANDERSON), paratypes, Mill Gate Plantation; e,f, transv.,
long. secs., X1.0 (Hudson & Anderson, 1928).
Synonyms
Hettonia
Geographic Distribution
Eu.(Brit.I.-?Donbas)
Age Range
Beginning Stage in Treatise Usage:
L.Carb.(Visean)
Beginning International Stage:
Visean
Fraction Up In Beginning Stage:
0
Beginning Date:
346.73
Ending Stage in Treatise Usage:
L.Carb.(Visean)
Ending International Stage:
Visean
Fraction Up In Ending Stage:
100
Ending Date:
330.34
Description
Solitary, curved conicocylindrical, with columellalike axial structure of dilated median plate and radial septal lamellae and tabellae, in early stages median plate continuous with counter septum and all septa dilated, dilatation decreasing first in counter quadrants, cardinal and commonly also neighboring pair of major septa shorter, in fossula on convex side of corallum, in late stages marginarium with large, concentric or in part angulate dissepiments, minor septa degenerate, tabulae declined from columella to marginarium, diphymorphic growth phases may occur in which columella disappears and tabulae flatten.
References
Hudson, R. G. S., , \& Anderson, F. W., , \& Cotton, G., , \& Fox, Thelma, , \& Platt, M. I., 1927, On the Lower Carboniferous corals: The development of Rylstonia benecompacta, gen. et sp. n.: Ann. Mag. Nat. Hist., ser. 9, v. 19, p. 39-48, pl. 1.
Museum or Author Information
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Aulophyllina
Family:
Aulophyllidae
Subfamily:
Amygdalophyllinae
Formal Genus Name and Reference:
Rylstonia Hudson & PLATT, 1927, p. 39
Type Species:
R. benecompacta, OD, †R25563, BM(NH), London
Images
(Click to enlarge in a new window)
Fig. 234,2a-d. *R. benecompacta, Visean, Skelterton Ls., Yorkshire, Clints Quarry near Rylstone, a, transv. sec., X2.0, b, c, transv. secs., X1.5, d, another specimen, long. sec., X1.5 (Hudson& Platt, 1927). --Fig. 234,2e,!. R. !allax (HUDSON & ANDERSON), paratypes, Mill Gate Plantation; e,f, transv.,
long. secs., X1.0 (Hudson & Anderson, 1928).
Synonyms
Hettonia
Geographic Distribution
Eu.(Brit.I.-?Donbas)
Age Range
Beginning Stage in Treatise Usage:
L.Carb.(Visean)
Beginning International Stage:
Visean
Fraction Up In Beginning Stage:
0
Beginning Date:
346.73
Ending Stage in Treatise Usage:
L.Carb.(Visean)
Ending International Stage:
Visean
Fraction Up In Ending Stage:
100
Ending Date:
330.34
Description
Solitary, curved conicocylindrical, with columellalike axial structure of dilated median plate and radial septal lamellae and tabellae, in early stages median plate continuous with counter septum and all septa dilated, dilatation decreasing first in counter quadrants, cardinal and commonly also neighboring pair of major septa shorter, in fossula on convex side of corallum, in late stages marginarium with large, concentric or in part angulate dissepiments, minor septa degenerate, tabulae declined from columella to marginarium, diphymorphic growth phases may occur in which columella disappears and tabulae flatten.
References
Hudson, R. G. S., , \& Anderson, F. W., , \& Cotton, G., , \& Fox, Thelma, , \& Platt, M. I., 1927, On the Lower Carboniferous corals: The development of Rylstonia benecompacta, gen. et sp. n.: Ann. Mag. Nat. Hist., ser. 9, v. 19, p. 39-48, pl. 1.