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The Conus Biodiversity Website


  Conus boholensis Petuch, 1979.

Range: Philippines, S. Vietnam, New Caledonia, N. W. Australia, and N. Somalia.

Description: Moderately small to medium-sized, light to moderately solid. Last whorl conical to ventricosely conical; outline slightly convex, with almost straight right side and sigmoid left side. Shoulder carinate, with a moderately deep exhalent notch. Spire of moderate height to high, stepped; outline almost straight. Larval shell of about 3 whorls, maximum diameter 1-1.1 mm. First 5-8 postnuclear whorls tuberculate; tubercles continuing as axial costae below outer margins and costae still present in smooth whorls. Teleoconch sutural ramps concave, with radial threads. Last whorl with spiral ribs at base and below shoulder, and ribbons or ribs between; intervening grooves variably broad, axially striate, and sometimes with a fine additional spiral rib. Subadults with a more uniform surface sculpture.

Shell Morphometry
  L 25-51 mm
  RW 0.03-0.10 g/mm
     (L 25-40 mm)
  RD 0.56-0.67
  PMD 0.78-0.95
  RSH 0.20-0.32

Ground colour white. Last whorl usually sparsely maculated with brown dots and flecks both spirally and axially aligned and sometimes clustered into a spiral row at centre; occasionally an additional adapical row present. Some specimens are entirely white. Larval whorls white. Postnuclear sutural ramps immaculate or sparsely marked with brown. Aperture translucent white.

Habitat and Habits: In 125-300 m (Philippines); in 300 m (N.W. Australia); at the edge of coral reef (Vietnam); in 310-550 m (New Caledonia region).

Discussion: Coomans et al. (1982) considered C. boholensis a synonym of C. borneensis Adams & Reeve. This seems doubtful, because the lectotype of C. borneensis can be distinguished by its concave spire outline, smooth upper part of last whorl and weak tubercles in the early postnuclear whorls. C. sieboldii is much larger, has a narrower last whorl (0.49-0.56), its spire outline is concave, its last whorl more convex adapically, and the upper part of the last whorl is smooth. C. pagodas has a very similar colour pattern, but differs in the constricted basal third of its last whorl, strong spiral sculpture on its postnuclear sutural ramps, and its concave spire outline; axial costae below outer margins of sutural are absent.

Range Map Image

C. boholensis 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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