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Spiriferella
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Spiriferoidea
Family:
Spiriferellidae
Formal Genus Name and Reference:
Spiriferella CHERNYSHEV, 1902, p. 121
Type Species:
Spirifer saranae de VERNEUIL, 1845, p. 169, OD
Images
(Click to enlarge in a new window)
Fig. 1198, 1a-d. *S. saranae (de Verneuil), Cisuralian, Russia, a-c, ventral, lateral, and posterior views of ventral valve, d, dorsal valve, X1 (Chernyshev, 1902).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Carboniferous (Bashkirian)
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
Permian (Capitanian)
Ending International Stage:
Capitanian
Fraction Up In Ending Stage:
100
Ending Date:
259.55
Description
Medium to large, usually elongate, hinge line moderately wide, cardinal extremities rounded in juveniles, variably mucronate or rounded in adults, maximum width usually anterior to hinge line, ventral umbonal region greatly inflated, delthyrium partially or completely covered by stegidia, ribbing in sulcus highly variable, lateral slopes strongly plicate, plicae broad, rounded, simple to costate, with fasciculate costae in some species, fold normally with median groove, microornament consisting of capillae, concentrically arranged pustules, and fine, regular growth lines, ventral valve greatly thickened with secondary shell matter, ventral interior with short, diverging dental adminicula, thick umbonal callus, and deeply impressed muscle field
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Spiriferoidea
Family:
Spiriferellidae
Formal Genus Name and Reference:
Spiriferella CHERNYSHEV, 1902, p. 121
Type Species:
Spirifer saranae de VERNEUIL, 1845, p. 169, OD
Images
(Click to enlarge in a new window)
Fig. 1198, 1a-d. *S. saranae (de Verneuil), Cisuralian, Russia, a-c, ventral, lateral, and posterior views of ventral valve, d, dorsal valve, X1 (Chernyshev, 1902).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Carboniferous (Bashkirian)
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
Permian (Capitanian)
Ending International Stage:
Capitanian
Fraction Up In Ending Stage:
100
Ending Date:
259.55
Description
Medium to large, usually elongate, hinge line moderately wide, cardinal extremities rounded in juveniles, variably mucronate or rounded in adults, maximum width usually anterior to hinge line, ventral umbonal region greatly inflated, delthyrium partially or completely covered by stegidia, ribbing in sulcus highly variable, lateral slopes strongly plicate, plicae broad, rounded, simple to costate, with fasciculate costae in some species, fold normally with median groove, microornament consisting of capillae, concentrically arranged pustules, and fine, regular growth lines, ventral valve greatly thickened with secondary shell matter, ventral interior with short, diverging dental adminicula, thick umbonal callus, and deeply impressed muscle field