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Lingulepis
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Obolidae
Formal Genus Name and Reference:
Lingulepis HALL, 1863c, p. 129
Type Species:
Lingula pinnaformis Owen, 1852, p. 583, SD DALL, 1870, p. 161
Images
(Click to enlarge in a new window)
Fig. 15, 5a, b. *L. pinnaformis (Owen), Upper Cambrian, Wisconsin, $a$, ventral valve exterior, USNM 51888d, x2.3, b$, dorsal valve exterior, AMNH 39076 B, X2.3 (new).
Synonyms
Geographic Distribution
North America, ?Europe, Greenland, Siberia, ?China (exact stratigraphic and geographic range quite uncertain at present)
Age Range
Beginning Stage in Treatise Usage:
Middle Cambrian
Beginning International Stage:
Wuliuan
Fraction Up In Beginning Stage:
0
Beginning Date:
509
Ending Stage in Treatise Usage:
Upper Cambrian, ?Ordovician
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Shell strongly acuminate, subtriangular, unequivalved, ventral beak strongly elongate, pseudointerarea elongate triangular, with narrow pedicle groove and flexure lines, dorsal pseudointerarea poorly known, ventral visceral area short, not extending to midvalve, dorsal visceral area slightly thickened, extending to midvalve, bisected by two divergent ridges, ventral vascula lateralia strongly arcuate.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Obolidae
Formal Genus Name and Reference:
Lingulepis HALL, 1863c, p. 129
Type Species:
Lingula pinnaformis Owen, 1852, p. 583, SD DALL, 1870, p. 161
Images
(Click to enlarge in a new window)
Fig. 15, 5a, b. *L. pinnaformis (Owen), Upper Cambrian, Wisconsin, $a$, ventral valve exterior, USNM 51888d, x2.3, b$, dorsal valve exterior, AMNH 39076 B, X2.3 (new).
Synonyms
Geographic Distribution
North America, ?Europe, Greenland, Siberia, ?China (exact stratigraphic and geographic range quite uncertain at present)
Age Range
Beginning Stage in Treatise Usage:
Middle Cambrian
Beginning International Stage:
Wuliuan
Fraction Up In Beginning Stage:
0
Beginning Date:
509
Ending Stage in Treatise Usage:
Upper Cambrian, ?Ordovician
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Shell strongly acuminate, subtriangular, unequivalved, ventral beak strongly elongate, pseudointerarea elongate triangular, with narrow pedicle groove and flexure lines, dorsal pseudointerarea poorly known, ventral visceral area short, not extending to midvalve, dorsal visceral area slightly thickened, extending to midvalve, bisected by two divergent ridges, ventral vascula lateralia strongly arcuate.