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Hemiptychina
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Terebratulida
Superfamily:
Dielasmatoidea
Family:
Gillediidae
Formal Genus Name and Reference:
Hemiptychina Wafgen, 1882, p. 335
Type Species:
Terebratula himalayensis DAVIDSON, 1862, p. 27, OD
Images
(Click to enlarge in a new window)
Fig. 1351, 1a-e. * H. bimalayensis (Davidson), Salt Range, Pakistan, a-d, dorsal, ventral, lateral, and anterior views, X1, e, interior of dorsal valve, approximately X1.5 (Waagen, 1882).
Synonyms
Morrisina. Jisuina
Geographic Distribution
Asia
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
Medium size, biconvex to subglobular, dorsal valve and some ventral valves geniculate anteriorly, anterior commissure rectimarginate, strongly plicate anteriorly, cardinal process shelflike, fulcral plates broad, conjunct with narrow, outer hinge plates, or directly connected with crural bases, inner hinge plates short, joining valve floor independently along their inner edges, crura short, conjunct with outer hinge plates, descending lamellae narrow, transverse band gently bent to V-shaped
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Terebratulida
Superfamily:
Dielasmatoidea
Family:
Gillediidae
Formal Genus Name and Reference:
Hemiptychina Wafgen, 1882, p. 335
Type Species:
Terebratula himalayensis DAVIDSON, 1862, p. 27, OD
Images
(Click to enlarge in a new window)
Fig. 1351, 1a-e. * H. bimalayensis (Davidson), Salt Range, Pakistan, a-d, dorsal, ventral, lateral, and anterior views, X1, e, interior of dorsal valve, approximately X1.5 (Waagen, 1882).
Synonyms
Morrisina. Jisuina
Geographic Distribution
Asia
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
Medium size, biconvex to subglobular, dorsal valve and some ventral valves geniculate anteriorly, anterior commissure rectimarginate, strongly plicate anteriorly, cardinal process shelflike, fulcral plates broad, conjunct with narrow, outer hinge plates, or directly connected with crural bases, inner hinge plates short, joining valve floor independently along their inner edges, crura short, conjunct with outer hinge plates, descending lamellae narrow, transverse band gently bent to V-shaped