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Neocyrtina
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferinida
Superfamily:
Suessioidea
Family:
Bittnerulidae
Formal Genus Name and Reference:
Neocyrtina Yang & XU, 1966, p. 62
Type Species:
N. mixodeltidiumosa, OD
Images
(Click to enlarge in a new window)
Fig. 1257, 2 a-i. *N*. mixodeltidiumosa, a, holotype, posterior view, b, dorsal interior, × 4, c-f, dorsal, ventral, lateral, and posterior views, × 2, g-i, transverse sections, approximately × 4 (Yang & Xu, 1966).
Synonyms
Geographic Distribution
China (Guizhou)
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
Small, with subconical ventral valve and weakly convex dorsal valve, maximum width at hinge line, cardinal extremities angular, ventral interarea high, flattened, catacline to procline, delthyrial cover bipartite with imbricating plates proximally and irregular solid nodules or tubules apically, fold and sulcus weakly delimited, smooth, fold with medial depression, lateral slopes with few plicae, growth lamellae closely imbricate, other microornament absent, punctae fine, ventral interior with thick callus uniting dental flanges and high, strong median septum, dorsal interior with short, broad ctenophoridium, jugum unknown.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferinida
Superfamily:
Suessioidea
Family:
Bittnerulidae
Formal Genus Name and Reference:
Neocyrtina Yang & XU, 1966, p. 62
Type Species:
N. mixodeltidiumosa, OD
Images
(Click to enlarge in a new window)
Fig. 1257, 2 a-i. *N*. mixodeltidiumosa, a, holotype, posterior view, b, dorsal interior, × 4, c-f, dorsal, ventral, lateral, and posterior views, × 2, g-i, transverse sections, approximately × 4 (Yang & Xu, 1966).
Synonyms
Geographic Distribution
China (Guizhou)
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
Small, with subconical ventral valve and weakly convex dorsal valve, maximum width at hinge line, cardinal extremities angular, ventral interarea high, flattened, catacline to procline, delthyrial cover bipartite with imbricating plates proximally and irregular solid nodules or tubules apically, fold and sulcus weakly delimited, smooth, fold with medial depression, lateral slopes with few plicae, growth lamellae closely imbricate, other microornament absent, punctae fine, ventral interior with thick callus uniting dental flanges and high, strong median septum, dorsal interior with short, broad ctenophoridium, jugum unknown.