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The Conus Biodiversity Website

CATALOGUE OF RECENT AND FOSSIL CONUS

  Conus andamanensis Smith, 1878.

Range: Andaman Sea.

Description: Moderately small, moderately light. Last whorl conical, ventricosely conical or conoid-cylindrical, outline slightly convex; left side slightly concave at base. Aperture wider at base than near shoulder. Shoulder subangulate to rounded. Spire of low to moderate height, outline concave. Larval shell of about 2.5 whorls, maximum diameter about 0.8 mm. Teleoconch sutural ramps nearly flat to slightly convex, with 2 increasing to 3 rather weak spiral grooves; late ramps either with obsolete spiral sculpture or 2-3 spiral grooves. Basal third to half of last whorl with widely spaced punctate spiral grooves and ribbons between; ribbons may grade to ribs at anterior end.

Shell Morphometry
  L 26-31 mm
  RW 0.07-0.13 g/mm
  RD 0.54-0.60
  PMD 0.77-0.87
  RSH 0.10-0.16

Ground colour white to bluish grey, may be suffused with pink. Last whorl with variably numerous, orangish to dark reddish brown dots, spots, spiral bars and small axial markings, irregularly scattered and sometimes additionally arranged in 2-3 spiral rows, on each side of central third and sometimes also below shoulder. Larval whorls white to beige. Late sutural ramps with orangish to dark reddish brown radial lines or streaks. Aperture white, may be orangish brown or violet-brown deep within.

Periostracum greyish brown, thin, translucent, smooth.

Habitat and Habits: Intertidal and shallow subtidal; in sand.

Discussion: Our description is based on the figure of an adult specimen given by Smith (31 x 15 mm) and closely corresponding shells from old collections in MNHN, coll. Salminger, and coll. Filmer; the 2 syntypes in BMNH are subadult. C. andamanensis has been assigned to C. collisus (Coomans et al., 1980) and to C. subulatus (Walls, [1979]; da Motta, 1986). We provisionally consider C. andamanensis a valid species (cf. Richard, 1990). C. collisus has a more angulate shoulder and its aperture is narrower; it also differs in more pronounced spiral grooves on its late sutural ramps, stronger spiral ribs and ribbons on its last whorl, and a last whorl pattern with larger and confluent markings as well as dotted or dashed spiral lines, and irregularly scattered markings are absent. For comparison with C. subulatus and C. broderipii, see the Discussions of the latter species.

Range Map Image

C. andamanensis 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.

 

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