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Microdontella
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Anthracosiacea
Family:
Microdontidae
Formal Genus Name and Reference:
Microdontella LEBEDEV, 1944
Type Species:
M. problematica, OD
Images
(Click to enlarge in a new window)
Fig. D11,3a,b. *M. problematica, 3a, dorsal view showing tumid umbones, X3, 3 b, same, showing microdont dentition, X10 (536). -Fig. D11,3c,d. M. subovata (Jones), 3c, LV (cast of ext.), X4, 3 d, RV (impression), X4 (Ragozin, 1955).-Fig. D11,3e. M. tomiensis (Ragozin), microdont hinge "greatly enlarged" (536).
Synonyms
Geographic Distribution
USSR (Sib.)
Age Range
Beginning Stage in Treatise Usage:
U.Perm.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
U.Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Like Posidonia in outline but microdont, with more tumid umbones in uncrushed shells and gently curved hinge line
References
Lebedev, I. B., 1944, O nekotorykh plastinchatozhabernykh iz kol'chuginskoy svity Kuzbassa: Akad. Nauk. Sci. SSSR, Izvestiya, Cl. Biol., no. 2, p. 78-88, 1 pl. [On some lamellibranchs from the Kolchugino Series of the Kuznetsk Basin.] Lebküchner, R., 1933, Die Trigonien des süddeutschen Jura: Palacontographica, v. 77, p. 1-119, pl. 1-16.
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:
Microdontella LEBEDEV, 1944
Type Species:
M. problematica, OD
Images
(Click to enlarge in a new window)
Fig. D11,3a,b. *M. problematica, 3a, dorsal view showing tumid umbones, X3, 3 b, same, showing microdont dentition, X10 (536). -Fig. D11,3c,d. M. subovata (Jones), 3c, LV (cast of ext.), X4, 3 d, RV (impression), X4 (Ragozin, 1955).-Fig. D11,3e. M. tomiensis (Ragozin), microdont hinge "greatly enlarged" (536).
Synonyms
Geographic Distribution
USSR (Sib.)
Age Range
Beginning Stage in Treatise Usage:
U.Perm.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
U.Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Like Posidonia in outline but microdont, with more tumid umbones in uncrushed shells and gently curved hinge line
References
Lebedev, I. B., 1944, O nekotorykh plastinchatozhabernykh iz kol'chuginskoy svity Kuzbassa: Akad. Nauk. Sci. SSSR, Izvestiya, Cl. Biol., no. 2, p. 78-88, 1 pl. [On some lamellibranchs from the Kolchugino Series of the Kuznetsk Basin.] Lebküchner, R., 1933, Die Trigonien des süddeutschen Jura: Palacontographica, v. 77, p. 1-119, pl. 1-16.