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Rhiphaeoceras

Classification

    Phylum:  
Mollusca
    Class:  
Cephalopoda
    Subclass:  
Nautiloidea
    Order:  
Nautilida
    Superfamily:  
Tainocerataceae
    Family:  
Rhiphaeoceratidae
    Formal Genus Name and Reference:  
Rhiphaeoceras Ruzhentsev & SHIMANSKIY, 1954
    Type Species:  
R. venustum, OD


Images

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Figs. 303,1; 304,4. *R. venustum; 303,1a,b, X1; 304, 4, X2 (153)


Synonyms



Geographic Distribution

USSR(S. Urals)


Age Range

    Beginning Stage in Treatise Usage:  
L.Perm.
    Beginning International Stage:  
Asselian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
298.89
    Ending Stage in Treatise Usage:  
L.Perm.
    Ending International Stage:  
Kungurian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
274.37


Description

Evolute, perforate, with low elliptical whorl section, shoulders broadly rounded, umbilicus wide, flanks bearing faint, narrow radial ribs. Suture with low, broad ventral saddle, straight on whorl sides, and with deep dorsal lobe; growth lines forming deep sinus on venter.




References



Museum or Author Information