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Crenispirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferinida
Superfamily:
Pennospiriferinoidea
Family:
Spiriferellinidae
Formal Genus Name and Reference:
Crenispirifer STEHLI, 1954, p. 347
Type Species:
Spiriferina angulata KING, 1931, p. 122, OD
Images
(Click to enlarge in a new window)
Fig. 1278, 2a-h. *C. angulata (King), Cisuralian, Texas, USA, a-e, dorsal, ventral, lateral, posterior, and anterior views, X1, f, dorsal interior, g-h, ventral interior and oblique view, X1.5 (Cooper & Grant, 1976b).
Synonyms
Geographic Distribution
North America
Age Range
Beginning Stage in Treatise Usage:
Carboniferous (Pennsylvanian)
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
Permian (Lopingian)
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Small to medium size, strongly biconvex, outline transversely subelliptical, profile subovate, cardinal extremities slightly to moderately rounded, fold and sulcus narrow, rounded, poorly delimited from lateral slopes, lateral slopes with few strong, very high, subangular plicae separated by deep, angular interspaces, microornament of close-set pustules or low spinules arranged in quincunx, growth varices irregularly spaced, subimbricate in some species, dental adminicula very short, jugum incomplete, punctae medium sized to coarse, arranged in quincunx
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferinida
Superfamily:
Pennospiriferinoidea
Family:
Spiriferellinidae
Formal Genus Name and Reference:
Crenispirifer STEHLI, 1954, p. 347
Type Species:
Spiriferina angulata KING, 1931, p. 122, OD
Images
(Click to enlarge in a new window)
Fig. 1278, 2a-h. *C. angulata (King), Cisuralian, Texas, USA, a-e, dorsal, ventral, lateral, posterior, and anterior views, X1, f, dorsal interior, g-h, ventral interior and oblique view, X1.5 (Cooper & Grant, 1976b).
Synonyms
Geographic Distribution
North America
Age Range
Beginning Stage in Treatise Usage:
Carboniferous (Pennsylvanian)
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
Permian (Lopingian)
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Small to medium size, strongly biconvex, outline transversely subelliptical, profile subovate, cardinal extremities slightly to moderately rounded, fold and sulcus narrow, rounded, poorly delimited from lateral slopes, lateral slopes with few strong, very high, subangular plicae separated by deep, angular interspaces, microornament of close-set pustules or low spinules arranged in quincunx, growth varices irregularly spaced, subimbricate in some species, dental adminicula very short, jugum incomplete, punctae medium sized to coarse, arranged in quincunx