Conus
moniwaensis (Nomura, 1940)
Descrizione.
Shell medium in size, stoutly turbinate, of about 6 ? whorls (apical
whorls lost). Spire apparently very low,
somewhat concave in general outline. Shoulder of last whorl rounded, buldging.
Area between sutures on spire marked by a few, well denned grooves. Aperture
narrow, linear, obliquely parallel-sided with a marked concavity of
inner lip near base.
Height ca. 40; diameter 27 mm.
A single specimen of the interior cast lacking its apex was examined.
The detail sculpture of the outer surface is not known at present, but the
shape is perhaps characteristic to distinguish it from any described species
from Japan. The nearest ally with the present species is perhaps C. eburneus
hwass, a Recent species
ranging from the Indo-Pacific to Japan, but differs from that species chiefly
in having a broader last whorl with rounder shoulder.
Occurrence:—Moniwa;
G. I. S. Coll., Reg. No. 23760.
Range:—Known only from the type locality.
Miocene.
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Conus moniwaensisPlate II fig. 16 Holotype – Moniwa G.I.S. Collection, N. 23750 |
Conus moniwaensisTochigi prefecture, Kanto region, Honshu island, Japan |
Bibliografia
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(1) - Nomura, S., 1940.
Molluscan Fauna of the Moniwa Shell Bed Exposed Along the Natori-Gawa in the
Vicinity of Sendai, Miyagi Prefecture, Japan. Science Reports Of The Tohoku
University, second ser.. 21 (1 ): 1-46
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