Conus springvaleensis      (Mansfield, 1925)

 

 

 

Description.

 

Shell rather small, moderately slender, eight whorled including a small erect nucleus. Spire slightly concave in contour, altitude 5 mm. above the plane of the spire. Whorls excavated and in­distinctly marked within by growth lines and bordered in front by a sharp, weakly denticulated carina. Suture loosely appressed. Last whorl gradually tapers to near the base where it is slightly incurved dextrally and reflected. Spiral sculpture on the lower half consists of about eleven flat bands, wide above and separated by striae, and narrower below with interspaces equal in width to the bands. Outer lip sharp. Aperture 2 mm. in greatest width, slightly wider below. Columella slightly inflected and reflected.

 

Dimensions: Type (U. S. Nat. Mus. Cat. No. 352044) measures: Altitude 27 mm.; alt. of spire 5 mm.

 

In a general way, the new species resembles C. chipolanus Dall from the Chipola marl member of the Alum Bluff formation of Florida, but differs from this species in possessing a more excavated and carinated spire whorl and a less tapering body whorl.

 

Occurrence: Upper Miocene, Springvale.

 


 

 

Conus springvaleensis

mm. 27

Upper Miocene

 

 

 

 

 

 



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