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Nudispiriferina
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferinida
Superfamily:
Pennospiriferinoidea
Family:
Balatonospiridae
Formal Genus Name and Reference:
Nudispiriferina Yang & XU, 1966, p. 47
Type Species:
N. minima, OD
Images
(Click to enlarge in a new window)
Fig. 1281, 4a-k. *N. minima, Guizhou, a-e, dorsal, ventral, lateral, posterior, and anterior views, f, enlarged dorsal view, X4, g-k, transverse sections, approximately X2 (Yang & Xu, 1966).
Synonyms
Geographic Distribution
southwestern China
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Middle Triassic
Ending International Stage:
Ladinian
Fraction Up In Ending Stage:
100
Ending Date:
237
Description
Strongly inequivalved with high, strongly convex ventral and weakly convex dorsal valves, cardinal extremities angular, ventral beak incurved, fold and sulcus poorly delineated, rounded, smooth, lateral slopes with few rounded plicae, microornament absent, dental adminicula and spondylium absent, dental flanges and median septum connected by very short, transverse callus or plate, cardinal process nonstriate, knoblike, sessile, jugum unknown.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferinida
Superfamily:
Pennospiriferinoidea
Family:
Balatonospiridae
Formal Genus Name and Reference:
Nudispiriferina Yang & XU, 1966, p. 47
Type Species:
N. minima, OD
Images
(Click to enlarge in a new window)
Fig. 1281, 4a-k. *N. minima, Guizhou, a-e, dorsal, ventral, lateral, posterior, and anterior views, f, enlarged dorsal view, X4, g-k, transverse sections, approximately X2 (Yang & Xu, 1966).
Synonyms
Geographic Distribution
southwestern China
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Middle Triassic
Ending International Stage:
Ladinian
Fraction Up In Ending Stage:
100
Ending Date:
237
Description
Strongly inequivalved with high, strongly convex ventral and weakly convex dorsal valves, cardinal extremities angular, ventral beak incurved, fold and sulcus poorly delineated, rounded, smooth, lateral slopes with few rounded plicae, microornament absent, dental adminicula and spondylium absent, dental flanges and median septum connected by very short, transverse callus or plate, cardinal process nonstriate, knoblike, sessile, jugum unknown.