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The Conus Biodiversity Website

CATALOGUE OF RECENT AND FOSSIL CONUS

  Conus caillaudii Kiener, 1846.

Range: W. Indian Ocean: Mascarene Is., Mascarene Plateau, Chagos Archipelago and Red Sea.

Description: Moderately small to medium-sized, usually moderately solid. Last whorl narrowly conical to conical, broadest in shells from the Red Sea; outline straight, slightly convex adapically. Shoulder angulate, to subangulate in Re'union, tuberculate to undulate. Spire of low to moderate height; outline variably concave, sometimes slightly sigmoid (Réunion). Postnuclear spire whorls tuberculate to undulate. Teleoconch sutural ramps flat, with 2 increasing to 3-4 spiral grooves; Red Sea shells with 4-6 faint spiral grooves on last 2 ramps. Last whorl with weak spiral grooves at base, occasionally followed adapically by widely spaced pairs of faint spiral ribs.

Shell Morphometry
  L 29-52 mm
  RW -0.20 g/mm
     (ca. L 40-45 mm)
  RD 0.47-0.62
  PMD 0.84-0.94
  RSH 0.08-0.16

Ground colour yellowish tan to brown. Last whorl with fine, evenly spaced reddish brown spiral lines; adjacent lines often differing in width. Base and basal part of columella either white or somewhat darker than rest of last whorl. Apex cream or violet. Teleoconch sutural ramps with reddish brown axial markings. Aperture white or pale violet. Specimens from Réunion (Pl. 4, Figs. 22, 23) differ in having broader reddish brown spiral lines on last whorl; the abapical lines narrower but variable in width. Base and basal part of columella creamy white. Specimen from Banka Saya de Malha (Pl. 4, Fig. 21) lacks any pattern elements. In specimens from Red Sea (Pl. 4, Figs. 24, 25), last whorl with a variably broad white spiral band at centre, flanked by a broad tan band on each side; additional narrow white zone below shoulder interspersed with widely spaced brown axial dashes. Base and basal part of columella dark brown.

Periostracum tan, thin, translucent, smooth.

Habitat and Habits: Subtidal. Specimen from Banka Saya de Malha dredged in 160 m.

Discussion: This poorly known species is unmistakable within the genus because of its combination of spirally lineate colour pattern and undulate to tuberculate shoulder. Whether the specimens of Banka Saya de Malha and Red Sea belonging to this species or not, is not fully resolved, because they have broader last whorls lacking a spirally lineate pattern.

Range Map Image

C. caillaudii 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 Rckel, 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 Rckel, 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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