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Goniomya
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Anomalodesmata
Order:
Pholadomyoida
Superfamily:
Pholadomyacea
Family:
Pholadomyidae
Formal Genus Name and Reference:
Goniomya AGASSIZ, 1841, p. 275
Type Species:
Mya angulifera J. Sowerby, 1819, p. 46 (=Mya intersectans Smith, 1817, p. 92, SD HERRMANNSEN, 1847, p. 486)
Images
(Click to enlarge in a new window)
Fig. F11,4. *G. (G.) intersectans (Smith), M.Jur. (Bathon.), Eng., 4a,b, LV ext., dorsal of both valves, X1 (Cox, n).
Synonyms
Gonomya, Gonyomya, Gonimya, Goniomyaa
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
L.Jur.(L. Lias.)
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Small to medium-sized, ovate, moderately to strongly elongate and inequilateral, with broadly rounded to subangular umbones protruding slightly above dorsal margin, beaks almost orthogyrous, inflation moderate, posterior gape relatively wide, anterior gape narrow, diagonal ridge obtuse, rounded off, escutcheon shallow, its bordering ridges ill-defined except near umbones, anterior and posterior parts of surface with discordant ribbing, hinge structure unknown, pallial sinus present.
References
Agassiz, L. J. R., 1841, Etudes critiques sur les mollusques fossiles. Mémoire sur les Trigonies: 58 p., 11 pl . (Neuchâtel).
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Anomalodesmata
Order:
Pholadomyoida
Superfamily:
Pholadomyacea
Family:
Pholadomyidae
Formal Genus Name and Reference:
Goniomya AGASSIZ, 1841, p. 275
Type Species:
Mya angulifera J. Sowerby, 1819, p. 46 (=Mya intersectans Smith, 1817, p. 92, SD HERRMANNSEN, 1847, p. 486)
Images
(Click to enlarge in a new window)
Fig. F11,4. *G. (G.) intersectans (Smith), M.Jur. (Bathon.), Eng., 4a,b, LV ext., dorsal of both valves, X1 (Cox, n).
Synonyms
Gonomya, Gonyomya, Gonimya, Goniomyaa
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
L.Jur.(L. Lias.)
Beginning International Stage:
Hettangian
Fraction Up In Beginning Stage:
0
Beginning Date:
201.36
Ending Stage in Treatise Usage:
Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Small to medium-sized, ovate, moderately to strongly elongate and inequilateral, with broadly rounded to subangular umbones protruding slightly above dorsal margin, beaks almost orthogyrous, inflation moderate, posterior gape relatively wide, anterior gape narrow, diagonal ridge obtuse, rounded off, escutcheon shallow, its bordering ridges ill-defined except near umbones, anterior and posterior parts of surface with discordant ribbing, hinge structure unknown, pallial sinus present.
References
Agassiz, L. J. R., 1841, Etudes critiques sur les mollusques fossiles. Mémoire sur les Trigonies: 58 p., 11 pl . (Neuchâtel).