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Monsardithyris
Classification
Phylum:
Class:
Rhynchonellata
Order:
Terebratulida
Superfamily:
Loboidothyridoidea
Family:
Lissajousithyrididae
Formal Genus Name and Reference:
Monsardithyris ALMÉRAS, 1971, p. 198
Type Species:
Terebratula ventricosa ZIETEN, 1830 in 1830-1833, p. 52, OD
Images
(Click to enlarge in a new window)
Fig. 1390, 5a-d. * M. ventricosa (Zieten), Bajocian, a-c, dorsal, lateral, and anterior views, Germany, X1 (Alméras & Moulan, 1988), d, interior of dorsal valve, France, X1 (Cooper, 1983).
Synonyms
Geographic Distribution
France, England, Germany, Algeria, Morocco, Arabia, Tibet
Age Range
Beginning Stage in Treatise Usage:
Lower Jurassic (Toarcian)
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
0
Beginning Date:
184.2
Ending Stage in Treatise Usage:
Middle Jurassic (Bajocian)
Ending International Stage:
Bajocian
Fraction Up In Ending Stage:
100
Ending Date:
168.17
Description
Large, elongate oval, anterior commissure rectimarginate to broadly uniplicate to sulciplicate, beak short, suberect, labiate, foramen large, permesothyrid, pedicle collar short, excavated, teeth long, narrow, cardinal process small, outer hinge plates short, narrow, triangular, concave, often notched anteriorly, loop long, triangular, 0.5 dorsal valve length, terminal points very long, webbed, transverse band and loop variable.
References
Museum or Author Information
Classification
Phylum:
Class:
Rhynchonellata
Order:
Terebratulida
Superfamily:
Loboidothyridoidea
Family:
Lissajousithyrididae
Formal Genus Name and Reference:
Monsardithyris ALMÉRAS, 1971, p. 198
Type Species:
Terebratula ventricosa ZIETEN, 1830 in 1830-1833, p. 52, OD
Images
(Click to enlarge in a new window)
Fig. 1390, 5a-d. * M. ventricosa (Zieten), Bajocian, a-c, dorsal, lateral, and anterior views, Germany, X1 (Alméras & Moulan, 1988), d, interior of dorsal valve, France, X1 (Cooper, 1983).
Synonyms
Geographic Distribution
France, England, Germany, Algeria, Morocco, Arabia, Tibet
Age Range
Beginning Stage in Treatise Usage:
Lower Jurassic (Toarcian)
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
0
Beginning Date:
184.2
Ending Stage in Treatise Usage:
Middle Jurassic (Bajocian)
Ending International Stage:
Bajocian
Fraction Up In Ending Stage:
100
Ending Date:
168.17
Description
Large, elongate oval, anterior commissure rectimarginate to broadly uniplicate to sulciplicate, beak short, suberect, labiate, foramen large, permesothyrid, pedicle collar short, excavated, teeth long, narrow, cardinal process small, outer hinge plates short, narrow, triangular, concave, often notched anteriorly, loop long, triangular, 0.5 dorsal valve length, terminal points very long, webbed, transverse band and loop variable.