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Atomodesma
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Ambonychiacea
Family:
Myalinidae
Subfamily:
Marine types
Formal Genus Name and Reference:
Atomodesma von BEYRICH, 1865
Type Species:
A. exaratum, SD WANNER, 1922, p. 63
Images
(Click to enlarge in a new window)
Fig. C28,3. *A. exaratum, Timor (fide DICKINS, 1956, p. 25); RV ext., X1 (Wanner, 1922)
Synonyms
Maitaia, Kolymia, Intomodesma
Geographic Distribution
Australasia-N.Z.Greenl.(Waterhouse, 1963
Age Range
Beginning Stage in Treatise Usage:
U.Penn., L.Perm
Beginning International Stage:
Kasimovian
Fraction Up In Beginning Stage:
0
Beginning Date:
307.02
Ending Stage in Treatise Usage:
U.Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Prosocline, duplivincular, ovoid shells of inoceramid aspect, with acute, terminal, or nearly terminal beaks, concentric folds, and small, internal umbonal deck or septum; prismatic layer well developed in both valves; lamellar layer thin.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Ambonychiacea
Family:
Myalinidae
Subfamily:
Marine types
Formal Genus Name and Reference:
Atomodesma von BEYRICH, 1865
Type Species:
A. exaratum, SD WANNER, 1922, p. 63
Images
(Click to enlarge in a new window)
Fig. C28,3. *A. exaratum, Timor (fide DICKINS, 1956, p. 25); RV ext., X1 (Wanner, 1922)
Synonyms
Maitaia, Kolymia, Intomodesma
Geographic Distribution
Australasia-N.Z.Greenl.(Waterhouse, 1963
Age Range
Beginning Stage in Treatise Usage:
U.Penn., L.Perm
Beginning International Stage:
Kasimovian
Fraction Up In Beginning Stage:
0
Beginning Date:
307.02
Ending Stage in Treatise Usage:
U.Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Prosocline, duplivincular, ovoid shells of inoceramid aspect, with acute, terminal, or nearly terminal beaks, concentric folds, and small, internal umbonal deck or septum; prismatic layer well developed in both valves; lamellar layer thin.