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Haplospirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Paeckelmannelloidea
Family:
Strophopleuridae
Formal Genus Name and Reference:
Haplospirifer Li & GU, 1976, p. 280
Type Species:
H. typicus, OD
Images
(Click to enlarge in a new window)
Fig. 1205, 4a-d. *H. typicus, ventral, dorsal, anterior, and posterior views, X1 (Li & Gu, 1976).
Synonyms
Geographic Distribution
China
Age Range
Beginning Stage in Treatise Usage:
Permian (Cisuralian)
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Permian (Cisuralian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Large, transversely subpentagonal to subovate in outline, ventral valve more inflated than dorsal, ventral interarea high, flattened, vertically grooved, delthyrium open, ventral beak slightly incurved, fold and sulcus strongly developed, sulcus with prominent, dorsally directed tongue, dorsal valve with shallow sulci adjacent to fold, lateral slopes with moderately numerous, mostly simple costae, ribs near fold-sulcus trifurcate, few others bifurcate, fold and sulcus smooth, ventral interior with short dental adminicula and large muscle scars
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Paeckelmannelloidea
Family:
Strophopleuridae
Formal Genus Name and Reference:
Haplospirifer Li & GU, 1976, p. 280
Type Species:
H. typicus, OD
Images
(Click to enlarge in a new window)
Fig. 1205, 4a-d. *H. typicus, ventral, dorsal, anterior, and posterior views, X1 (Li & Gu, 1976).
Synonyms
Geographic Distribution
China
Age Range
Beginning Stage in Treatise Usage:
Permian (Cisuralian)
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Permian (Cisuralian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Large, transversely subpentagonal to subovate in outline, ventral valve more inflated than dorsal, ventral interarea high, flattened, vertically grooved, delthyrium open, ventral beak slightly incurved, fold and sulcus strongly developed, sulcus with prominent, dorsally directed tongue, dorsal valve with shallow sulci adjacent to fold, lateral slopes with moderately numerous, mostly simple costae, ribs near fold-sulcus trifurcate, few others bifurcate, fold and sulcus smooth, ventral interior with short dental adminicula and large muscle scars