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Libycoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Acanthocerataceae
Family:
Sphenodiscidae
Formal Genus Name and Reference:
Libycoceras HYATT, 1900, p. 585
Type Species:
Engonoceras ismaeli Zittel, 1895, p. 451, OD (=Ammonites ismaelis ZITTEL, 1883, p. 74, nom. nud.)
Images
(Click to enlarge in a new window)
Fig. 159, 3a-c. *L. ismaeli (Zittel), Upper Campanian or Lower Maastrichtian, Libya, a, X 0.5, b, X 0.4, c, X 0.75 (Zittel, 1895)
Synonyms
Paciceras
Geographic Distribution
Libya, Chad, Nigeria, Egypt, Israel, Saudia Arabia, Japan, Colombia, Peru
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Lower Campanian)
Beginning International Stage:
Campanian
Fraction Up In Beginning Stage:
0
Beginning Date:
83.65
Ending Stage in Treatise Usage:
Upper Cretaceous (Lower Maastrichtian)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
50
Ending Date:
69.72
Description
Venter fastigiate or lanceolate but may become broadly rounded on body chamber, smooth or with faint, broad ribs, some with lateral and ventrolateral tubercles, fading on outer whorl
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Acanthocerataceae
Family:
Sphenodiscidae
Formal Genus Name and Reference:
Libycoceras HYATT, 1900, p. 585
Type Species:
Engonoceras ismaeli Zittel, 1895, p. 451, OD (=Ammonites ismaelis ZITTEL, 1883, p. 74, nom. nud.)
Images
(Click to enlarge in a new window)
Fig. 159, 3a-c. *L. ismaeli (Zittel), Upper Campanian or Lower Maastrichtian, Libya, a, X 0.5, b, X 0.4, c, X 0.75 (Zittel, 1895)
Synonyms
Paciceras
Geographic Distribution
Libya, Chad, Nigeria, Egypt, Israel, Saudia Arabia, Japan, Colombia, Peru
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Lower Campanian)
Beginning International Stage:
Campanian
Fraction Up In Beginning Stage:
0
Beginning Date:
83.65
Ending Stage in Treatise Usage:
Upper Cretaceous (Lower Maastrichtian)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
50
Ending Date:
69.72
Description
Venter fastigiate or lanceolate but may become broadly rounded on body chamber, smooth or with faint, broad ribs, some with lateral and ventrolateral tubercles, fading on outer whorl