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Septaliphorioidea
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Wellerelloidea
Family:
Allorhynchidae
Formal Genus Name and Reference:
Septaliphorioidea Yang & XU, 1966, p. 29101
Type Species:
S. paucicostata, OD
Images
(Click to enlarge in a new window)
Fig. 865, 5a-l. $* S$. paucicostata, paratype, Gheizhou, $a-d$, dorsal, lateral, anterior, ventral views, MCMB DDR3C3, x2$, $e-l$, transverse serial sections, distances in mm from ventral umbo, 0.3, 0.7, 0.9, 1.1, 1.25, 1.4, 1.7, 2.0, MCMB DDR III D3-2 (Yang & Xu, 1966).
Synonyms
Septaliphoroidea
Geographic Distribution
western China
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic (Anisian)
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Middle Triassic (Anisian)
Ending International Stage:
Anisian
Fraction Up In Ending Stage:
100
Ending Date:
241.46
Description
Small, roundly triangular to subpentagonal, depressed subequibiconvex, uniplicate, ventral sulcus and dorsal fold well developed, fold flattopped and truncated at front, covered with plicae, bifurcating on dorsal but intercalating on ventral valve, rounded costae, extending from umbo, 2 to 4 on fold, 3 to 4 on lateral slopes, beak straight to slightly incurved, narrow deltidial plates. Dental plates short, hinge plates divided, median ridge weak and low, septalium absent.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Wellerelloidea
Family:
Allorhynchidae
Formal Genus Name and Reference:
Septaliphorioidea Yang & XU, 1966, p. 29101
Type Species:
S. paucicostata, OD
Images
(Click to enlarge in a new window)
Fig. 865, 5a-l. $* S$. paucicostata, paratype, Gheizhou, $a-d$, dorsal, lateral, anterior, ventral views, MCMB DDR3C3, x2$, $e-l$, transverse serial sections, distances in mm from ventral umbo, 0.3, 0.7, 0.9, 1.1, 1.25, 1.4, 1.7, 2.0, MCMB DDR III D3-2 (Yang & Xu, 1966).
Synonyms
Septaliphoroidea
Geographic Distribution
western China
Age Range
Beginning Stage in Treatise Usage:
Middle Triassic (Anisian)
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Middle Triassic (Anisian)
Ending International Stage:
Anisian
Fraction Up In Ending Stage:
100
Ending Date:
241.46
Description
Small, roundly triangular to subpentagonal, depressed subequibiconvex, uniplicate, ventral sulcus and dorsal fold well developed, fold flattopped and truncated at front, covered with plicae, bifurcating on dorsal but intercalating on ventral valve, rounded costae, extending from umbo, 2 to 4 on fold, 3 to 4 on lateral slopes, beak straight to slightly incurved, narrow deltidial plates. Dental plates short, hinge plates divided, median ridge weak and low, septalium absent.