Conus oinouyei

Conus oinouyei (Yokoyama, 1928)

Descrizione.

Shell rather small, obconical, with spire low and concave in lateral outlines. Whorls about nine, either fiat or slightly excavated, with peripheral angle projecting aboye the suture more on the younger whorls than on the older; spirally striate, with striae several in number and close together. Periphery angular. Body-whorl almost straight when laterally viewed, the curvature being very slight, apparently smooth on the upper two-thirds and spirally grooved on the lower one-third. Aperture narrow, parallel-sided ⁽¹⁾.

A single example which we possess is about :35 millim. in height and 12 millim. in diameter.

The species which shows the closest affinity to the present is Conus sieboldi Rve. (Yokoyama, Foss. Miura Penin., p. 34, pl. I, fig. 14), especially when it is young, which, however, has the peripheral angle more projecting and the whorls more concave.

Fossil occurrence. Lower Byoritz Beds: South of Kwan-in San, Taikei Gai, Shinchik

A fragmen of a Conus resembling this species was picked up from the Upper Arisand Bedsat Kotei,Sansoshδy Shinchik

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The morphology of this species can be identified with that recorded by Hu and Tao (2003); the shell is conical, and the spiral layer is Ladder-shaped distribution, body snails have inclined shoulders, and slender horizontal stripes. The shell surface is smooth ⁽²⁾.

According to Yokoyama (Yokoyama, 1928), this species was reported to be produced in the "Miaoli layer of the ㆘be" (= Guizhulin layer) in the New Epoch ⁽²⁾