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Lepidodesma
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Unionacea (freshwater mussels)
Family:
Unionidae
Subfamily:
Anodontinae
Formal Genus Name and Reference:
Lepidodesma SIMPSON, 1900
Type Species:
Unio languilata HEUDE, 1874, OD
Images
(Click to enlarge in a new window)
Fig. D40,8. *L. languilatum (Heude), Rec., 8 a, b, LV ext., RV int., X0.4 (405).
Synonyms
Geographic Distribution
E.Asia
Age Range
Beginning Stage in Treatise Usage:
U.Plio.
Beginning International Stage:
Piacenzian
Fraction Up In Beginning Stage:
0
Beginning Date:
3.6
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Large, thin, inflated, with 2 high and sharp posterior ridges, beaks very high and full, with sculpture of cordlike ridges following growth lines and extending over whole shell, with row of radiating nodules on middle of disc and another stronger one on posterior ridge, ligament very large, covered with concentric scales, 2 anterior claustra in LV, 1st elongate, and with 2 long, posterior claustra, higher having edge reflexed upward, an anterior and posterior claustrum in RV, periostracum scaly, folded into hinge
References
Simpson, C. T., 1900, Synopsis of the najades or pearly freshwater mussels: U. S. Natl. Museum, Proc., v. 22, p. 501-1044, pl. 18.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Unionacea (freshwater mussels)
Family:
Unionidae
Subfamily:
Anodontinae
Formal Genus Name and Reference:
Lepidodesma SIMPSON, 1900
Type Species:
Unio languilata HEUDE, 1874, OD
Images
(Click to enlarge in a new window)
Fig. D40,8. *L. languilatum (Heude), Rec., 8 a, b, LV ext., RV int., X0.4 (405).
Synonyms
Geographic Distribution
E.Asia
Age Range
Beginning Stage in Treatise Usage:
U.Plio.
Beginning International Stage:
Piacenzian
Fraction Up In Beginning Stage:
0
Beginning Date:
3.6
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Large, thin, inflated, with 2 high and sharp posterior ridges, beaks very high and full, with sculpture of cordlike ridges following growth lines and extending over whole shell, with row of radiating nodules on middle of disc and another stronger one on posterior ridge, ligament very large, covered with concentric scales, 2 anterior claustra in LV, 1st elongate, and with 2 long, posterior claustra, higher having edge reflexed upward, an anterior and posterior claustrum in RV, periostracum scaly, folded into hinge
References
Simpson, C. T., 1900, Synopsis of the najades or pearly freshwater mussels: U. S. Natl. Museum, Proc., v. 22, p. 501-1044, pl. 18.