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Paratetradium
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Tabulata
Order:
Tetradiida
Family:
Tetradiidae
Formal Genus Name and Reference:
Paratetradium SOKOLOV, 1955, p. 249
Type Species:
*Tetradium halysitoides RAYMOND, 1913, p. 49, OD, † 7839, Natl. Type Coll., GSC, Ottawa
Images
(Click to enlarge in a new window)
Fig. 339,2a,b. *P halysitoides (RAYMOND), M.Ord. (low.Lowville), Can., Carden, Ont.; a,b, ext. views, X2.1, X1.1
(Raymond, 1913).
Synonyms
Geographic Distribution
Asia(Sib.Platf.)-N.Am.(Ont.-Que.-Tenn.-Ind.-Ky.-Pa.); M.Ord., Australia(New S. Wales); U.Ord., Eu.(Urals)
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
U.Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Corallum composed of a small number of corallites compactly accreted by their walls and growing as a long cluster encased in a holotheca that forks at intervals, walls thick, increase axial quadripartite, offsets do not separate, secondary radial longitudinal plates may be present, tabulae sparse, horizontal
References
Museum or Author Information
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Tabulata
Order:
Tetradiida
Family:
Tetradiidae
Formal Genus Name and Reference:
Paratetradium SOKOLOV, 1955, p. 249
Type Species:
*Tetradium halysitoides RAYMOND, 1913, p. 49, OD, † 7839, Natl. Type Coll., GSC, Ottawa
Images
(Click to enlarge in a new window)
Fig. 339,2a,b. *P halysitoides (RAYMOND), M.Ord. (low.Lowville), Can., Carden, Ont.; a,b, ext. views, X2.1, X1.1
(Raymond, 1913).
Synonyms
Geographic Distribution
Asia(Sib.Platf.)-N.Am.(Ont.-Que.-Tenn.-Ind.-Ky.-Pa.); M.Ord., Australia(New S. Wales); U.Ord., Eu.(Urals)
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
U.Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Corallum composed of a small number of corallites compactly accreted by their walls and growing as a long cluster encased in a holotheca that forks at intervals, walls thick, increase axial quadripartite, offsets do not separate, secondary radial longitudinal plates may be present, tabulae sparse, horizontal