Conus vaderensis (Weaver & Palmer, 1922)

 

 


Descrizione e caratteristiche (1):

 

 

Shell of medium size, biconical; whorls four to five with three to four smooth, apical whorls which are very pointed; suture appressed; area between the suture and the shoulder of the whorls concave and sculptured with fine, curved striae; shoulder decorated with 16 or 18 nodes; body whorl covered wioth revolving microscopically, raised ribs crossed by longitudinal lines.  The spiral ribs or lines are better developed on the posterior region of the whorl; aperture long and narrow with parallel sides (1).

This shell is close to C. remondii Gabb. Gabb states the the sides of the whorls are straight and regularly conical. His illustration bears out this characteristic. The sides of the whorls of C. vaderensis are concave. The general appearance of this species is somewhat similar to C. cowlitzensis Weaver, but the spire of both young and mature individuals of C. vaderensis is only about one-half that of C cowlitzsensis. The former possesses also a characteristically greater diameter (1).

 

Dimensions (1): altitude of the shell 29 mm.; width of body whorl 12 mm.; apical angle 60°.

Occurrence (1): At locality 329 (University of Washington Palaeontological Collection) at bend of Cowlitz Rover, near Vader, Lewis County, Section 28, Township 11 North, Range 2 West.

 

 


 

Conus vaderensis (1)

Plate XII - fig. 7, 8

Eocene

 

Conus vaderensis

Holotype 7539

Eocene

 

 

Conus vaderensis

 

 

 

 

 

 

 

 

 

 



Bibliografia Consultata

 

·         (1) - Weaver, C. E., and Palmer, K. V. W., 1922. Fauna from the Eocene of Washington. University Of Washington Publications In Geology, 1(3): 1 -45

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