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Lytoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Lytocerataceae
Family:
Lytoceratidae
Formal Genus Name and Reference:
Lytoceras SUESS, 1865
Type Species:
Am. fimbriatus J.SOWERBY, 1817, ICZN Opinion 130
Images
(Click to enlarge in a new window)
Fig. 225,3. •L. fimbriatum (Sow.), L. Jur.(L.Pliensb.), Eng.; 3a,b, X0.5 (65·)
Synonyms
Ophiceras; Thysanoceras; Trachylytoceras; Fimbrilytoceras; Kallilytoceras; Lobolytoceras; Cosmolytoceras; Crenilytoceras; Orcholytoceras; Saturnoceras; Biasaloceras; Dinolytoceras; Valentolytoceras
Geographic Distribution
world-wide, as far N. as Greenl. and N. Alask
Age Range
Beginning Stage in Treatise Usage:
L.Jur.(Sinem.
Beginning International Stage:
Sinemurian
Fraction Up In Beginning Stage:
0
Beginning Date:
199.46
Ending Stage in Treatise Usage:
Upper Cretaceous (Cenomanian).
Ending International Stage:
Cenomanian
Fraction Up In Ending Stage:
100
Ending Date:
93.9
Description
Whorls round or quadrate, covered with crinkled growth lines or riblets, some species with lamellar flares, under which slight constriction usually occurs on internal mold; some with fine strigation.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Lytocerataceae
Family:
Lytoceratidae
Formal Genus Name and Reference:
Lytoceras SUESS, 1865
Type Species:
Am. fimbriatus J.SOWERBY, 1817, ICZN Opinion 130
Images
(Click to enlarge in a new window)
Fig. 225,3. •L. fimbriatum (Sow.), L. Jur.(L.Pliensb.), Eng.; 3a,b, X0.5 (65·)
Synonyms
Ophiceras; Thysanoceras; Trachylytoceras; Fimbrilytoceras; Kallilytoceras; Lobolytoceras; Cosmolytoceras; Crenilytoceras; Orcholytoceras; Saturnoceras; Biasaloceras; Dinolytoceras; Valentolytoceras
Geographic Distribution
world-wide, as far N. as Greenl. and N. Alask
Age Range
Beginning Stage in Treatise Usage:
L.Jur.(Sinem.
Beginning International Stage:
Sinemurian
Fraction Up In Beginning Stage:
0
Beginning Date:
199.46
Ending Stage in Treatise Usage:
Upper Cretaceous (Cenomanian).
Ending International Stage:
Cenomanian
Fraction Up In Ending Stage:
100
Ending Date:
93.9
Description
Whorls round or quadrate, covered with crinkled growth lines or riblets, some species with lamellar flares, under which slight constriction usually occurs on internal mold; some with fine strigation.