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Palaeanodonta
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Anthracosiacea
Family:
Anthracosiidae
Formal Genus Name and Reference:
Palaeanodonta AMALITSKX, 1895
Type Species:
Unio castor EICHWALD, 1859 (fide F. A. BATHER; 1861, fide L. R. Cox)
Images
(Click to enlarge in a new window)
Fig. D10,3. *P. castor (E1chwald), USSR, both valves, X2 (E1chwald, 1855-61)"
Synonyms
Geographic Distribution
USSR, S.Afr., E.Afr., Burma, Norway
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
Small, transversely subelliptical, ovate or rhomboidal, elongated and somewhat attenuated posteriorly, posterior extremity narrower (measured dorsoventrally) than anterior lobe and regularly rounded, truncated or pointed, Umbones slightly inflated, distinct but not prominent, approximate, situated at about 0.25 of length from anterior end, Anterior lobe defined by well-marked lunular hollow, indefinite carina may be present, running obliquely from umbo to posteroventral extremity, hinge edentulous, hinge line gently curved or straight, ligament opisthodetic in narrow furrow
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Anthracosiacea
Family:
Anthracosiidae
Formal Genus Name and Reference:
Palaeanodonta AMALITSKX, 1895
Type Species:
Unio castor EICHWALD, 1859 (fide F. A. BATHER; 1861, fide L. R. Cox)
Images
(Click to enlarge in a new window)
Fig. D10,3. *P. castor (E1chwald), USSR, both valves, X2 (E1chwald, 1855-61)"
Synonyms
Geographic Distribution
USSR, S.Afr., E.Afr., Burma, Norway
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
Small, transversely subelliptical, ovate or rhomboidal, elongated and somewhat attenuated posteriorly, posterior extremity narrower (measured dorsoventrally) than anterior lobe and regularly rounded, truncated or pointed, Umbones slightly inflated, distinct but not prominent, approximate, situated at about 0.25 of length from anterior end, Anterior lobe defined by well-marked lunular hollow, indefinite carina may be present, running obliquely from umbo to posteroventral extremity, hinge edentulous, hinge line gently curved or straight, ligament opisthodetic in narrow furrow