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Fossula
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Unionacea (freshwater mussels)
Family:
Mutelidae
Formal Genus Name and Reference:
Fossula LEA, 1870
Type Species:
Monocondylaea fossiculifera D'ORBIGNY, 1835, OD
Images
(Click to enlarge in a new window)
Fig. D54,12. *F. fossiculifera (d'Orbigny), 12a,b, LV ext., RV int., X0.5 (140)
Synonyms
Fossicula
Geographic Distribution
S.Am.
Age Range
Beginning Stage in Treatise Usage:
Rec.
Beginning International Stage:
Greenlandian
Fraction Up In Beginning Stage:
0
Beginning Date:
0.01
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Obovate, inflated, heavy, with rather high beaks and low posterior ridge, periostracum olive-brown, somewhat smooth, slightly rayed in some; hinge with irregular tooth in LV under beak, followed posteriorly by cavity and 2 irregular teeth separated by cavity under beak of RV; teeth and cavities somewhat pitted and partly covered with brown periostracum.
References
Lea, Isaac, 1870, A synopsis of the family Unionidae: 4th edit., 184 p. (see p. 72, footnote), H. C. Lea (Philadelphia).
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Unionacea (freshwater mussels)
Family:
Mutelidae
Formal Genus Name and Reference:
Fossula LEA, 1870
Type Species:
Monocondylaea fossiculifera D'ORBIGNY, 1835, OD
Images
(Click to enlarge in a new window)
Fig. D54,12. *F. fossiculifera (d'Orbigny), 12a,b, LV ext., RV int., X0.5 (140)
Synonyms
Fossicula
Geographic Distribution
S.Am.
Age Range
Beginning Stage in Treatise Usage:
Rec.
Beginning International Stage:
Greenlandian
Fraction Up In Beginning Stage:
0
Beginning Date:
0.01
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Obovate, inflated, heavy, with rather high beaks and low posterior ridge, periostracum olive-brown, somewhat smooth, slightly rayed in some; hinge with irregular tooth in LV under beak, followed posteriorly by cavity and 2 irregular teeth separated by cavity under beak of RV; teeth and cavities somewhat pitted and partly covered with brown periostracum.
References
Lea, Isaac, 1870, A synopsis of the family Unionidae: 4th edit., 184 p. (see p. 72, footnote), H. C. Lea (Philadelphia).