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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

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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

Zittel, 1895