Conus sp. A (Ladd, 1981)

 

 

Medium in size, spire depressed, apex pointed; whorls of spire flattened with several spiral ribs that are obscured by strong, close-set, curved axial lines of growth; suture impressed. Sides of body whorl concave, greatly narrowed toward the base; flattened spiral ribs present on the lowest third of the shell.

Measurements of the figured specimen, USNM 175133: length 44.8 mm, diameter 24.1 mm.

 

The Fijian fossil seems most closely related to C. ngavianus described by Martin (1895, p. 23, pl. 4, figs. 57–61) from the upper Tertiary of Java but has a lower spire and is more constricted anteriorly.

 

Conus sp. A resembles C. monile Hwass, a Holocene species from the tropical Indian and western Pacific Oceans but has a more angular shoulder, is more constricted anteriorly, and has more strongly developed basal ribs. It also resembles C. fosteri Clench and Arguay (Clench, 1942, p. 34, pl. 12, fig. 5), a species living in the western Atlantic, but has a lower spire and a more strongly concave profile. If additional specimens are collected, the Fijian fossil may prove to be an unnamed species.

 

Occurrence.—A single specimen from station K700 on Vanua Levu, Fiji; age, probably Pliocene (Tertiary h).

 

 

 

 

 
Conus sp. A

USNM 175133

mm. 44,8 x 24,1

Pliocene

Fiji

 

 

 

 

 


Bibliografia Consultata