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Microdonta
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Anthracosiacea
Family:
Microdontidae
Formal Genus Name and Reference:
Microdonta KHALFIN, 1950
Type Species:
Palaeomutela microdonta KHALFIN, 1939, OD
Images
(Click to enlarge in a new window)
Fig. Dll,la. *M. mierodonta (KHALFIN); RV ext., X2.5.--Fig. Dll,lb. M. astartellaeformis (FEDOTOV); RV into showing part of microdont hinge, X6 (Ragozin, 1955).
Synonyms
Geographic Distribution
USSR(Sib.)
Age Range
Beginning Stage in Treatise Usage:
Perm.
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Nuculoid, valves convex, hinge margin gently curved, microdont.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Anthracosiacea
Family:
Microdontidae
Formal Genus Name and Reference:
Microdonta KHALFIN, 1950
Type Species:
Palaeomutela microdonta KHALFIN, 1939, OD
Images
(Click to enlarge in a new window)
Fig. Dll,la. *M. mierodonta (KHALFIN); RV ext., X2.5.--Fig. Dll,lb. M. astartellaeformis (FEDOTOV); RV into showing part of microdont hinge, X6 (Ragozin, 1955).
Synonyms
Geographic Distribution
USSR(Sib.)
Age Range
Beginning Stage in Treatise Usage:
Perm.
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Nuculoid, valves convex, hinge margin gently curved, microdont.