Range: Taiwan, Philippines, Papua New Guinea, New Caledonia, and Queensland.
Description: Large, solid to heavy. Last whorl ventricosely conical to slightly pyriform; outline convex at adapical fourth to three-fourths, straight to slightly concave below; columella curved to left at base in very large specimens. Shoulder angulate to rounded. Spire of moderate height, outline slightly sigmoid to concave. Maximum diameter of larval shell about 1.3 mm. First 5- 10 postnuclear whorls tuberculate. Teleoconch sutural ramps slightly concave to slightly convex, with 3 increasing to 8-10 spiral grooves. Adult specimens with weak or obsolete spiral ribs at base of last whorl. In subadult shells, entire last whorl with wide punctate or axially striate spiral grooves and ribbons between; ribbons narrow at base; some grooves with a central spiral rib.
| Shell Morphometry | ||
|---|---|---|
| L | 90-161 mm | |
| RW | 0.60-1.30 g/mm | |
| (L 90-142 mm) | ||
| RD | 0.51-0.59 | |
| PMD | 0.77-0.82 | |
| RSH | 0.16-0.18 | |
Ground colour white. Last whorl usually with variably numerous and variably long brown axial streaks and blotches on both sides of centre, sometimes fused into broad, interrupted spiral bands. Central area immaculate or with a few brown markings. Early teleoconch sutural ramps immaculate, later ramps with scattered brown markings. Aperture white.
Periostracum olive, thin, translucent and smooth in subadult Philippine specimens, but "light brown" and "pilose" in the holotype (Iredale, 1937).
Habitat and Habits: In 50-400 m.
Discussion: C. pergrandis is similar to C. tisii; for comparison see the DISCUSSION of the latter species. The holotype of C. pergrandis lacks dark pattern elements, while the holotype of C. potusmarumai is based on a slightly lower- spired shell.
C. pergrandis 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.