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Virgatosphinctes

Classification

    Phylum:  
Mollusca
    Class:  
Cephalopoda
    Order:  
Ammonitida
    Superfamily:  
Perisphinctaceae
    Family:  
Perisphinctidae
    Formal Genus Name and Reference:  
Virgatosphinctes UHLIC, 1910
    Type Species:  
V. broilii, SD R. DOUVILLÉ, 1912


Images

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Fig. 429,1. *V. broilii (Uhlig), M. Spiti sh., 1 a, b, X0.5 (533*).


Synonyms



Geographic Distribution

Eu.-N.Afr.-Somali.?Abys. - Tangan. - Madag. - Cauc. - Persia - Cutch-Baluch.-Himalaya-NW. Austral.-Mex.-Cuba-Trini-dad-Arg.


Age Range

    Beginning Stage in Treatise Usage:  
L.Tithon.
    Beginning International Stage:  
Tithonian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
149.24
    Ending Stage in Treatise Usage:  
U.Tithon.
    Ending International Stage:  
Tithonian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
143.1


Description

Large, moderately evolute, whorls rounded to slightly compressed, ribs biplicate, gradually becoming triplicate, virgatotome, then fasciculate, and gradually enlarging and becoming more distant, at all stages ribbing is smoother than in Pseudovirgatites or Subplanites, more like that of Wheatleyites, aperture sinuous, simple.




References



Museum or Author Information