Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Nudirostralina
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchonelloidea
Family:
Rhynchonellidae
Formal Genus Name and Reference:
Nudirostralina Yang & XU, 1966, p. 21
Type Species:
N. subtrinodosi, OD
Images
(Click to enlarge in a new window)
Fig. 873, 4 a-l. * N. subtrinodosi, Anisian, Guizhou, a-d, holotype, dorsal, lateral, anterior, ventral views, MCMB DDR IA4-2, × 1, e-l, paratype, transverse serial sections, distances in mm from ventral umbo, 0.2, 0.9, 1.3, 1.5, 1.8, 2.05, 2.2, 2.4, MCMB DDR Ia4-4 (Yang & Xu, 1966).
Synonyms
Nudirostrolina, Nudirostrlina
Geographic Distribution
China (Guizhou, Qinghai, Tibet), ?India
Age Range
Beginning Stage in Treatise Usage:
Lower Triassic
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
Upper Triassic
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Medium size, subtrigonal to subpentagonal, dorsibiconvex to gently everted, ventral sulcus and dorsal fold well marked anteriorly, commissure uniplicate, bidentate to multidentate, shell completely smooth posteriorly and with only few short plicae anteriorly and laterally, 2 to 5 on fold, usually 2 on each lateral slope, beak small, slightly incurved, deltidial plates small, covering delthyrium, hypothyrid to submesothyrid. Dental plates ventrally divergent, dorsal median septum short, supporting septalium, crura short, ventrally curved.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchonelloidea
Family:
Rhynchonellidae
Formal Genus Name and Reference:
Nudirostralina Yang & XU, 1966, p. 21
Type Species:
N. subtrinodosi, OD
Images
(Click to enlarge in a new window)
Fig. 873, 4 a-l. * N. subtrinodosi, Anisian, Guizhou, a-d, holotype, dorsal, lateral, anterior, ventral views, MCMB DDR IA4-2, × 1, e-l, paratype, transverse serial sections, distances in mm from ventral umbo, 0.2, 0.9, 1.3, 1.5, 1.8, 2.05, 2.2, 2.4, MCMB DDR Ia4-4 (Yang & Xu, 1966).
Synonyms
Nudirostrolina, Nudirostrlina
Geographic Distribution
China (Guizhou, Qinghai, Tibet), ?India
Age Range
Beginning Stage in Treatise Usage:
Lower Triassic
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
Upper Triassic
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Medium size, subtrigonal to subpentagonal, dorsibiconvex to gently everted, ventral sulcus and dorsal fold well marked anteriorly, commissure uniplicate, bidentate to multidentate, shell completely smooth posteriorly and with only few short plicae anteriorly and laterally, 2 to 5 on fold, usually 2 on each lateral slope, beak small, slightly incurved, deltidial plates small, covering delthyrium, hypothyrid to submesothyrid. Dental plates ventrally divergent, dorsal median septum short, supporting septalium, crura short, ventrally curved.