Range: Bay of Bengal (Coromandel coast), Sri Lanka, Gulf of Oman.
Description: Moderately small to medium-sized, moderately light to moderately solid. Last whorl ventricosely conical or conoid-cylindrical to pyriform; outline convex to straight adapically, straight to concave (right side) or concave (left side) below. Shoulder subangulate to rounded, slightly undulate. Spire high, outline almost straight. Larval shell multispiral, maximum diameter 0.8-0.9 mm. First 5-7 postnuclear whorls with many small tubercles, following whorls undulate. Teleoconch sutural ramps flat, with 0 increasing to 2 broad spiral grooves and arcuate radial threads, leaving a strongly granulose subsutural ridge and 2 less granulose spiral ribs, below centre and at outer margin. Last whorl heavily sculptured with about 20 prominent smooth or granulose spiral ribs and axially striate wide grooves between.
Shell Morphometry | ||
---|---|---|
L | 29-38 mm | |
RW | 0.07-0.11 g/mm | |
RD | 0.59-0.63 | |
PMD | 0.75-0.81 | |
RSH | 0.25-0.29 |
Ground colour white to light brown, Last whorl with darker brown lines on ribs. Larval whorls white. Postnuclear sutural ramps with irregular brown radial markings. Aperture white or pale brown.
Periostracum dark olive or blackish brown, opaque, smooth.
Radular teeth adapically constricted, with an adapical barb opposite 2 barbs arranged in a line (Thiele, 1929: 372 fig. 460). The radular tooth figured by da Motta (1986a) for this species is erroneous..
Habitat and Habits: In 70-400 m.
Discussion: C. coromandelicus is the only recent species placed in the genus Conorbis. We include this genus in the Conidae, because partial resorbtion of inner walls, a hallmark of Conus, also occurs in Conorbis (see Kohn, 1978, 1990). In addition, its radular morphology is consistent with that of Conidae (Powell, 1942).
C. coromandelicus range map
This section contains verbatim reproductions of the accounts of 316 species of Conus from the Indo-Pacific region, from Manual of the Living Conidae, by Röckel, Korn and Kohn (1995). They are reproduced with the kind permission of the present publisher, Conchbooks.
All plates and figures referred to in the text are also in Röckel, Korn & Kohn, 1995. Manual of the Living Conidae Vol. 1: Indo-Pacific Region.
The range maps have been modified so that each species account has it own map, rather than one map that showed the ranges of several species in the original work. This was necessary because each species account is on a separate page on the website and not confined to the order of accounts in the book.