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Oxygonioceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Oncocerida
Family:
Brevicoceratidae
Formal Genus Name and Reference:
Oxygonioceras FOERSTE, 1925, p. 62
Type Species:
Trochoceras oxynotum BARRANDE, 1865, pl. 14, OD
Images
(Click to enlarge in a new window)
Fig. 212, 3. *O. oxynotum (Barrande), Eu. (Czech.), 3a,b, lat. (venter convex), dorsal, x0.5 (5)
Synonyms
Geographic Distribution
N.Am.-Eu. (Eng.-Czech.)
Age Range
Beginning Stage in Treatise Usage:
M.Sil.
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
M.Sil.
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Compressed, loosely coiled, dextral torticones, with rounded dorsum and angular or subangular venter in transverse section, sutures with broad lateral lobes. Siphuncle ventral, segments broadly nummuloidal, subscalariform, empty
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Oncocerida
Family:
Brevicoceratidae
Formal Genus Name and Reference:
Oxygonioceras FOERSTE, 1925, p. 62
Type Species:
Trochoceras oxynotum BARRANDE, 1865, pl. 14, OD
Images
(Click to enlarge in a new window)
Fig. 212, 3. *O. oxynotum (Barrande), Eu. (Czech.), 3a,b, lat. (venter convex), dorsal, x0.5 (5)
Synonyms
Geographic Distribution
N.Am.-Eu. (Eng.-Czech.)
Age Range
Beginning Stage in Treatise Usage:
M.Sil.
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
M.Sil.
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Compressed, loosely coiled, dextral torticones, with rounded dorsum and angular or subangular venter in transverse section, sutures with broad lateral lobes. Siphuncle ventral, segments broadly nummuloidal, subscalariform, empty