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.
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Conus springvaleensismm. 27 Upper Miocene |
Bibliografia Consultata
- (1) - Mansfield, W. C., 1925. Miocene
Gastropods and Scaphopods from Trinidad, British West
Indies. Proceedings of the United States National Museum, 66 (2259 ):
1 -65
- (1a)
- Mansfield, W. C., 1925. Miocene Gastropods and Scaphopods from Trinidad,
British West Indies. Proceedings of the United States National
Museum, 66 (2259 ): 1 -65