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Heterelasmina
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Terebratulida
Suborder:
Terebratulidina
Superfamily:
Dielasmatoidea
Family:
Heterelasminidae
Formal Genus Name and Reference:
Heterelasmina LIKHAREV, 1939b, p. 120
Type Species:
Hemiptychina dieneri GEMMELLARO, 1899, p. 100, OD
Images
(Click to enlarge in a new window)
Fig. 1347, 4a. *H. dieneri (Gemmellaro), interior of dorsal valve, X1 (Gemmellaro, 1899)., Fig. 1347, 4b-e. H. genuflexa Gemmellaro, Palermo, Sicily, b-c, dorsal and ventral views, d, lateral view, e, interior of dorsal valve, X1.5 (Stehli, 1962).
Synonyms
Geographic Distribution
Sicily, northern Caucasus, Tajikistan, Mongolia, Pakistan, Laos
Age Range
Beginning Stage in Treatise Usage:
Permian (Guadalupian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
0
Beginning Date:
274.37
Ending Stage in Treatise Usage:
Permian (Lopingian)
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Small to medium, elongate oval, straight sided, planoconvex, smooth posteriorly with a few plicae developing anteriorly, anterior commissure emarginate, uniplicate to sulciplicate, foramen permesothyrid, strongly labiate, pedicle collar present, hinge plates obsolete, crura arising from crural plates
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Terebratulida
Suborder:
Terebratulidina
Superfamily:
Dielasmatoidea
Family:
Heterelasminidae
Formal Genus Name and Reference:
Heterelasmina LIKHAREV, 1939b, p. 120
Type Species:
Hemiptychina dieneri GEMMELLARO, 1899, p. 100, OD
Images
(Click to enlarge in a new window)
Fig. 1347, 4a. *H. dieneri (Gemmellaro), interior of dorsal valve, X1 (Gemmellaro, 1899)., Fig. 1347, 4b-e. H. genuflexa Gemmellaro, Palermo, Sicily, b-c, dorsal and ventral views, d, lateral view, e, interior of dorsal valve, X1.5 (Stehli, 1962).
Synonyms
Geographic Distribution
Sicily, northern Caucasus, Tajikistan, Mongolia, Pakistan, Laos
Age Range
Beginning Stage in Treatise Usage:
Permian (Guadalupian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
0
Beginning Date:
274.37
Ending Stage in Treatise Usage:
Permian (Lopingian)
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Small to medium, elongate oval, straight sided, planoconvex, smooth posteriorly with a few plicae developing anteriorly, anterior commissure emarginate, uniplicate to sulciplicate, foramen permesothyrid, strongly labiate, pedicle collar present, hinge plates obsolete, crura arising from crural plates