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Myopholas
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Anomalodesmata
Order:
Pholadomyoida
Superfamily:
Pholadomyacea
Family:
Myopholadidae
Formal Genus Name and Reference:
Myopholas DOUVILLÉ, 1907, p. 107
Type Species:
Pholadomya multicostata AGASSIZ, 1842, p. 52, OD
Images
(Click to enlarge in a new window)
Fig. F20,1a,b. *M. multicostata (Agassiz), U.Jur.(Kimmeridg.), Switz., 1a, b, RV ext. and dorsal view of both valves, X1 (Cox, n), -- Fig. F20,1c. M. ledouxi Douvillé, L.Cret.(U. Alb.), France, dorsal view of both valves showing groove on RV of internal mold, X1 (Douvillé, 1907)
Synonyms
Geographic Distribution
Eu.
Age Range
Beginning Stage in Treatise Usage:
M.Jur.(Bathon.)
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
0
Beginning Date:
168.17
Ending Stage in Treatise Usage:
L.Cret.(U.Alb)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Characters and distribution of family = Shell medium-sized, elongate-ovate, some specimens with slight tendency to be rostrate posteriorly; umbones broadly rounded, scarcely protruding, situated anterior to mid-length and strongly incurved to slightly prosogyrous beaks; inflation of shell strong below umbones, diminishing regularly in posterior direction; valve margins with tending back from beak on internal mold, as in those two genera; adductor scars and pallial line unknown; ostracum thin, prob- ably originally nacreous internally.
References
Douvillé, Henri, 1907, Les lamellibranches cavicoles ou desmodontes: Same, Bull., v. 7, no. 4, p. 96-114, pl. 2.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Anomalodesmata
Order:
Pholadomyoida
Superfamily:
Pholadomyacea
Family:
Myopholadidae
Formal Genus Name and Reference:
Myopholas DOUVILLÉ, 1907, p. 107
Type Species:
Pholadomya multicostata AGASSIZ, 1842, p. 52, OD
Images
(Click to enlarge in a new window)
Fig. F20,1a,b. *M. multicostata (Agassiz), U.Jur.(Kimmeridg.), Switz., 1a, b, RV ext. and dorsal view of both valves, X1 (Cox, n), -- Fig. F20,1c. M. ledouxi Douvillé, L.Cret.(U. Alb.), France, dorsal view of both valves showing groove on RV of internal mold, X1 (Douvillé, 1907)
Synonyms
Geographic Distribution
Eu.
Age Range
Beginning Stage in Treatise Usage:
M.Jur.(Bathon.)
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
0
Beginning Date:
168.17
Ending Stage in Treatise Usage:
L.Cret.(U.Alb)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Characters and distribution of family = Shell medium-sized, elongate-ovate, some specimens with slight tendency to be rostrate posteriorly; umbones broadly rounded, scarcely protruding, situated anterior to mid-length and strongly incurved to slightly prosogyrous beaks; inflation of shell strong below umbones, diminishing regularly in posterior direction; valve margins with tending back from beak on internal mold, as in those two genera; adductor scars and pallial line unknown; ostracum thin, prob- ably originally nacreous internally.
References
Douvillé, Henri, 1907, Les lamellibranches cavicoles ou desmodontes: Same, Bull., v. 7, no. 4, p. 96-114, pl. 2.