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Asiatotrigonia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Trigonioida
Superfamily:
Trigoniacea
Family:
Trigoniidae
Formal Genus Name and Reference:
Asiatotrigonia COX, 1952, p. 63
Type Species:
Trigonia sultanuisi ARCHANGELSKI, 1916, p. 32, OD
Images
(Click to enlarge in a new window)
Fig. D66,6. *A. sultanuisi (Archangelski), RV ext., X0.7 (Archangelski, 1916)
Synonyms
Geographic Distribution
Turkestan
Age Range
Beginning Stage in Treatise Usage:
U.Cret.(Cenoman.)
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
U.Cret.(Cenoman.)
Ending International Stage:
Cenomanian
Fraction Up In Ending Stage:
100
Ending Date:
93.9
Description
Obliquely ovate, not tapering or truncated posteriorly, strongly inequilateral, no carinae, area and escutcheon undefined, posterior region unornamented, flank smooth except for few obscure V-shaped costae near umbo and more or less radial, irregular, narrow wrinkles present on its anterior part in later growth stages
References
Cox, L. R., 1952, Notes on the Trigoniidae, with outlines of a classification of the family: Malacol. Soc. London. Proc., v. 29, p. $45-$ 70, pl. 3-4.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Trigonioida
Superfamily:
Trigoniacea
Family:
Trigoniidae
Formal Genus Name and Reference:
Asiatotrigonia COX, 1952, p. 63
Type Species:
Trigonia sultanuisi ARCHANGELSKI, 1916, p. 32, OD
Images
(Click to enlarge in a new window)
Fig. D66,6. *A. sultanuisi (Archangelski), RV ext., X0.7 (Archangelski, 1916)
Synonyms
Geographic Distribution
Turkestan
Age Range
Beginning Stage in Treatise Usage:
U.Cret.(Cenoman.)
Beginning International Stage:
Cenomanian
Fraction Up In Beginning Stage:
0
Beginning Date:
100.5
Ending Stage in Treatise Usage:
U.Cret.(Cenoman.)
Ending International Stage:
Cenomanian
Fraction Up In Ending Stage:
100
Ending Date:
93.9
Description
Obliquely ovate, not tapering or truncated posteriorly, strongly inequilateral, no carinae, area and escutcheon undefined, posterior region unornamented, flank smooth except for few obscure V-shaped costae near umbo and more or less radial, irregular, narrow wrinkles present on its anterior part in later growth stages
References
Cox, L. R., 1952, Notes on the Trigoniidae, with outlines of a classification of the family: Malacol. Soc. London. Proc., v. 29, p. $45-$ 70, pl. 3-4.