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Fusispirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Spiriferoidea
Family:
Trigonotretidae
Formal Genus Name and Reference:
Fusispirifer Waterhouse, 1966, p. 43
Type Species:
Spirifer nitiensis DIENER, 1897b, p. 41, OD
Images
(Click to enlarge in a new window)
Fig. 1188, 1a-e. *F. nitiensis (Diener), Lopingian, Nepal, syntype, ventral, dorsal, anterior, posterior, and lateral views, X1 (Diener, 1897b).
Synonyms
Transversaria
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Permian (Asselian)
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Permian (Lopingian)
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Strongly transverse throughout ontogeny, weakly biconvex, beak small, umbonal region poorly differentiated, cardinal extremities acutely alate in most growth stages, becoming rounded in adults of some species, sulcus narrow, with broad, commonly bifurcating median costa, fold narrow, moderately high, ventral interior much thickened by callus, delthyrial plate thickened, large, delthyrium partially occluded by stegidial plates, costae coarse to fine, nearly equidimensional, arranged in weak fascicles of 3 to 5 costae, microornament capillate, some species weakly lamellose
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Spiriferoidea
Family:
Trigonotretidae
Formal Genus Name and Reference:
Fusispirifer Waterhouse, 1966, p. 43
Type Species:
Spirifer nitiensis DIENER, 1897b, p. 41, OD
Images
(Click to enlarge in a new window)
Fig. 1188, 1a-e. *F. nitiensis (Diener), Lopingian, Nepal, syntype, ventral, dorsal, anterior, posterior, and lateral views, X1 (Diener, 1897b).
Synonyms
Transversaria
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Permian (Asselian)
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Permian (Lopingian)
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Strongly transverse throughout ontogeny, weakly biconvex, beak small, umbonal region poorly differentiated, cardinal extremities acutely alate in most growth stages, becoming rounded in adults of some species, sulcus narrow, with broad, commonly bifurcating median costa, fold narrow, moderately high, ventral interior much thickened by callus, delthyrial plate thickened, large, delthyrium partially occluded by stegidial plates, costae coarse to fine, nearly equidimensional, arranged in weak fascicles of 3 to 5 costae, microornament capillate, some species weakly lamellose