Atlanticonus kendrewi (Petuch, 1997)

 

 

Description:

 

Shell of average size for subgenus, elongated, tapering, with straight sides; spire flattened, with faintly stepped, slightly projecting whorls; shoulder sharply-angled, bounded by thick, ridgelike carina; carina present on spire whorls, producing depressed scalariform appearance; body whorl heavily sculptured with (on unique holotype) 24 large, evenly-spaced, highlyraised spiral cords: spire whorls ornamented with 5 fine, evenly-spaced spiral threads: aperture straight, narrow.

 

Material examined:

 

HOLOTYPE — Length 35 mm, width 21 mm. in back-reef lagoonal facies (Stylophora bioherm) of the Suwannee Formation, Terramar Pit. westernmost Polk County. Florida. UF 75994.

 

Etymology:

 

Named fr Mr. Eric Kendrew of Valrico, Florida, who collected the holotvpe at the Terramar Pit.

 

Discussion:

 

Conus kendrewi, with its extremely heavy corded body sculpture, wide shoulder carina, and depressed scalariform spire, is the most distinctive cone shell known from the Eastern American Oligocene. The only contemporaneous cone that even remotely resembles this new species is the svmpatric Suwannee and Flint River C. (Leptoconus?) cookei Dall. 1916. Conus kendrewi differs from this more wide-ranging species in having a much coarser and stronger spiral cord sculpture, in having a distinctly stepped spire, and in having a prominent shoulder carina that extends beyond the body whorl outline.

 

 

 

 

Atlanticonus kendrewi (1)

mm. 33

Lower Oligocene

Suwannee Fm.

 

Atlanticonus kendrewi (2)

Holotype UF 75994

mm. 35 x 21

 

 

 

 

 

Bibliografia Consultata

 

·         (2) - Petuch, E. J., 1997. A New Gastropod Fauna from an Oligocene Back-Reef Lagoonal Environment in West Central Florida. The Nautilus: A Quarterly Devoted to Malacology, 110 (4 ): 122 -138