Range: Philippines, Marshall Is., New Caledonia, W. Thailand.

Description: Small to moderately small, light to moderately light. Last whorl conical to ventricosely conical; outline straight to slightly convex; left side often slightly concave at base. Shoulder with strong, pointed tubercles continuing as costae below shoulder edge and often also across sutural ramps. Spire of moderate height to high, stepped; outline straight to slightly concave. Larval shell of 3.0-3.25 whorls, maximum diameter 0.7-0.8 mm. Postnuclear whorls with tubercles continuing as costae. Teleoconch sutural ramps concave, with 1-3 increasing to 3-7 spiral grooves; spiral sculpture may be weak in latest whorls. Sculpture of last whorl ranging from a few weak, smooth spiral ribs at base to granulose ribs from base to shoulder.

Colour of last whorl yellow-brown to dark brown on both sides of a usually narrow white spiral central band; base light. Dark zones often with spiral rows of variably spaced white dots. Central band with tine. brown connected lines, outlining white spots to blotches. In some specimens, brown areas consisting of axial zigzag lines and broader spiral lines. Larval whorls white. Postnuclear sutural ramps white, with brown radial blotches and fine lines. Aperture translucent to white.

Habitat and Habits: Shallow water to 350 m. In Marshall Is., in about 65 m, in coral rubble outside the lagoon at the base of the reef cliff; in New Caledonia, dredged in 300-350 m.

Discussion: C. polongimarumai resembles C. chiangi most closely. The latter species differs in its lighter colour pattern, with a primarily tan or grey rather than brown last whorl, and its hollow marginal spines rather than tubercles on the shoulder.

C. polongimarumai 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.