Conus
tokunagai (Otuka, 1934)
Descrizione (1).
Shell
moderate in size, elongate conic; spire elevate, acute, slightly concave when
seen sideways. Whorls 9-8 shouldered; shoulder smooth, subrounded, above which
the surface is somewhat concave with oblique line of growth and fine spiral
striae which number about 6-8 on the penultimate whorl. On the body
whorl the oblique spiral cords only appearing near the lower end. Number of the
oblique spiral cords about 13-11 near the inner margin of the aperture. Number
of cords in 5 mm. length about 5-6. Aperture long and narrow.
Occurrence:—LOWER KADONOSAWA
SERIES (Early Miocene). Nisatai (loc. 3; rg. no. 1593).
This
species is very closely allied to
Conus pauperculus Sowerby, living in
the temperate waters of Japan, but the former differs from the latter in
that the shell has a highspite and prominent spiral cords with broad interspaces.
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Conus tokunagai
Syntype CM 12124 pl. 50, figs. 83, 84 mm. |
Conus tokunagai
mm. |
Bibliografia