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Eopteria
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Cryptodonta
Order:
Praecardioida
Superfamily:
Praecardiacea
Family:
Praecardiidae
Subfamily:
Praecardiinae
Formal Genus Name and Reference:
Eopteria BILLINGS, 1865, p. 221
Type Species:
E. typica, OD
Images
(Click to enlarge in a new window)
Fig. B2, 1. E. richardsoni (BILLINGS), L.Ord.(Quebec Gr.), St. Antoine, Que.; la, LV ext.; Ib, dorsal VIew both valves; both Xl (52)
Synonyms
Geographic Distribution
U. Cam. (erratic in L.Ord. Levis Sh.), Quebec; L. Ord.(Beekmantown.}, Quebec-New
Age Range
Beginning Stage in Treatise Usage:
U. Cam. (erratic in L.Ord.)
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
50
Beginning Date:
498.75
Ending Stage in Treatise Usage:
L.Ord.
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Valves evenly convex, beaks incurved, nearly orthogyre, ventral margin semicircular, hinge about as long as shell length, with subquadrate extremities; valves with slight anterior gape; area obscure or lacking; ornamented with fine costellae.
References
Billings, Elkanah, 1865, Palaeozoic fossils: Geol. Survey Canada, v. 1, 426 p., 399 text fig.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Cryptodonta
Order:
Praecardioida
Superfamily:
Praecardiacea
Family:
Praecardiidae
Subfamily:
Praecardiinae
Formal Genus Name and Reference:
Eopteria BILLINGS, 1865, p. 221
Type Species:
E. typica, OD
Images
(Click to enlarge in a new window)
Fig. B2, 1. E. richardsoni (BILLINGS), L.Ord.(Quebec Gr.), St. Antoine, Que.; la, LV ext.; Ib, dorsal VIew both valves; both Xl (52)
Synonyms
Geographic Distribution
U. Cam. (erratic in L.Ord. Levis Sh.), Quebec; L. Ord.(Beekmantown.}, Quebec-New
Age Range
Beginning Stage in Treatise Usage:
U. Cam. (erratic in L.Ord.)
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
50
Beginning Date:
498.75
Ending Stage in Treatise Usage:
L.Ord.
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Valves evenly convex, beaks incurved, nearly orthogyre, ventral margin semicircular, hinge about as long as shell length, with subquadrate extremities; valves with slight anterior gape; area obscure or lacking; ornamented with fine costellae.
References
Billings, Elkanah, 1865, Palaeozoic fossils: Geol. Survey Canada, v. 1, 426 p., 399 text fig.