Conus designatus (Dall, 1915)

Shell of moderite size with low, broadly conical spire of about 8 worls; nucleus prominent, subglobular, inflated, smooth; subsequent whorls flattened on the spire, narrow, bordered at the shoulder by a slightly rounded keel, and separated by a distinct but not deep suture; the whorls on the spire are not spirally sculptured, but show faint traces of incremental, concavely arcuate lines; last whorl in front of the shoulder smooth, acutely conic, the only sculpture being in the anterior third, which has about a dozen fine spiral threads with wider interspaces becoming more crowded and feebly minutely nodulous anteriorly; on the smooth posterior part of the whorl in certain lights can be seen spiral lines distant and fine, but which appear rather to be in the substance of the shell and do not sculpture the surface; aperture narrow elongate, the canal short and wide; the outer lip sharp, simple and very slightly convexly arcuate ⁽¹⁾.

Length of shell 23.8, cf aperture 21.5, maximum diameter 12 mm.

Tampa silex beds at Ballast Point, Tampa Bay, Florida.

Type-specimen from the Post collection, U. S. Nat. Mus. No. 165031.

Conus designatus Plate 6 fig. 4 Tampa, Florida Oligocene mm. 23,8	Conus designatus ( Arcadia formation )
	Conus designatus Miocene Tampa bay Fm. – Silex Beds – Florida mm. 21,4 x 11,6 [AZFC 551-01]

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Bibliografia Consultata

· (1 ) - Dall, W. H., 1915. A Monograph of the Molluscan Fauna of the Orthaulax Pugnax Zone of the Oligocene of Tampa, Florida. United States National Museum Bulletin, 90

· (1a) - Dall, W. H., 1915. A Monograph of the Molluscan Fauna of the Orthaulax Pugnax Zone of the Oligocene of Tampa, Florida. United States National Museum Bulletin, 90