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C
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Uncertain
Superfamily:
Uncitoidae
Family:
Uncertain
Formal Genus Name and Reference:
C nysti (Davidson), 1959, p. 1959
Type Species:
Images
(Click to enlarge in a new window)
C. nysti (Davidson), dorsal view showing auriculate deltidial plates and incomplete foramen, upper Miocene, Antwerp, Belgium, USNM 549422a, × 20 (Cooper, 1959).
Synonyms
Geographic Distribution
Upper Cretaceous (upper Campanian)-Holocene
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (upper Campanian)
Beginning International Stage:
Campanian
Fraction Up In Beginning Stage:
0
Beginning Date:
77.91
Ending Stage in Treatise Usage:
Holocene
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
0
Ending Date:
0
Description
Small, smooth rhynchonellide shells, with large deltoid foramen slightly restricted by elongate, triangular, auriculate deltidial plates, distant from each other, beak ridges sharp. Dental plates variably developed to absent, crura moderately long, maniculiform, continuous with socket ridges, dorsal median septum usually elevated anteriorly, cardinal process a bilobate thickening between socket ridges, single pair of metanephridia, 2 pairs of adductor muscles and circinate spirolophe.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Uncertain
Superfamily:
Uncitoidae
Family:
Uncertain
Formal Genus Name and Reference:
C nysti (Davidson), 1959, p. 1959
Type Species:
Images
(Click to enlarge in a new window)
C. nysti (Davidson), dorsal view showing auriculate deltidial plates and incomplete foramen, upper Miocene, Antwerp, Belgium, USNM 549422a, × 20 (Cooper, 1959).
Synonyms
Geographic Distribution
Upper Cretaceous (upper Campanian)-Holocene
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (upper Campanian)
Beginning International Stage:
Campanian
Fraction Up In Beginning Stage:
0
Beginning Date:
77.91
Ending Stage in Treatise Usage:
Holocene
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
0
Ending Date:
0
Description
Small, smooth rhynchonellide shells, with large deltoid foramen slightly restricted by elongate, triangular, auriculate deltidial plates, distant from each other, beak ridges sharp. Dental plates variably developed to absent, crura moderately long, maniculiform, continuous with socket ridges, dorsal median septum usually elevated anteriorly, cardinal process a bilobate thickening between socket ridges, single pair of metanephridia, 2 pairs of adductor muscles and circinate spirolophe.