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Sphaeroidothyris
Classification
Phylum:
Class:
Rhynchonellata
Order:
Terebratulida
Superfamily:
Loboidothyridoidea
Family:
Loboidothyrididae
Formal Genus Name and Reference:
Sphaeroidothyris Buckman, 1918, p. 115 (BUCKMAN, 1914, p. 2, nom. nud.)
Type Species:
S. globisphaeroidalis, OD
Images
(Click to enlarge in a new window)
Fig. 1380, 2a-d. *S. globisphaeroidalis, Bajocian, England, a-c, dorsal, lateral, and anterior views, X1 (Muir-Wood, 1965a), d, interior of dorsal valve, X1 (Cooper, 1983).
Synonyms
Pachythyris, Pionopleurum
Geographic Distribution
England, France, Germany, Saudi Arabia, Tibet
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (Bajocian)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
Middle Jurassic (Bathonian)
Ending International Stage:
Bathonian
Fraction Up In Ending Stage:
100
Ending Date:
165.29
Description
Small to medium size, subcircular, planoconvex to ventribiconvex to globose, smooth, anterior commissure rectimarginate to slightly uniplicate, beak short, incurved, foramen large, permesothyrid, symphytium hidden, cardinal process prominent, lobate, medianly depressed, hinge plates short, triangular, thin, close to valve floor, loop 0.3 to 0.4 dorsal valve length, widely triangular, transverse band with angular arch
References
Museum or Author Information
Classification
Phylum:
Class:
Rhynchonellata
Order:
Terebratulida
Superfamily:
Loboidothyridoidea
Family:
Loboidothyrididae
Formal Genus Name and Reference:
Sphaeroidothyris Buckman, 1918, p. 115 (BUCKMAN, 1914, p. 2, nom. nud.)
Type Species:
S. globisphaeroidalis, OD
Images
(Click to enlarge in a new window)
Fig. 1380, 2a-d. *S. globisphaeroidalis, Bajocian, England, a-c, dorsal, lateral, and anterior views, X1 (Muir-Wood, 1965a), d, interior of dorsal valve, X1 (Cooper, 1983).
Synonyms
Pachythyris, Pionopleurum
Geographic Distribution
England, France, Germany, Saudi Arabia, Tibet
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (Bajocian)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
Middle Jurassic (Bathonian)
Ending International Stage:
Bathonian
Fraction Up In Ending Stage:
100
Ending Date:
165.29
Description
Small to medium size, subcircular, planoconvex to ventribiconvex to globose, smooth, anterior commissure rectimarginate to slightly uniplicate, beak short, incurved, foramen large, permesothyrid, symphytium hidden, cardinal process prominent, lobate, medianly depressed, hinge plates short, triangular, thin, close to valve floor, loop 0.3 to 0.4 dorsal valve length, widely triangular, transverse band with angular arch