Range: Philippines, New Caledonia.

Description: Small to medium-sized, light to moderately solid. Last whorl conical to ventricosely conical; outline slightly convex below shoulder, almost straight below; left side concave or constricted at base. Shoulder angulate. Spire of low to moderate height; outline slightly convex to straight. Larval shell projecting, of 3.25-3.5 whorls; maximum diameter 0.85-0.95 mm in Philippines, 1.1 - 1.2 mm in New Caledonia. First 0.25-2 postnuclear whorls weakly tuberculate to undulate. Teleoconch sutural ramps almost flat, with 1-2 increasing to 3-5 spiral grooves. Last whorl smooth and glossy, except for a few spiral ribs at base.

Ground colour pale violet to reddish brown, occasionally yellow or white. Last whorl axially clouded with various shades of brown; clouds usually leaving a light central band and occasionally fusing into 2 spiral bands, on both sides of centre. Non-clouded areas variably encircled with rows of alternating dark brown and white dots or dashes. Larval whorls beige to light brown, with a brown blotch in specimens from New Caledonia. Postnuclear sutural ramps with brown radial markings. reduced in some places to dots along outer margins. Aperture pale violet, often partly translucent in smaller shells.

Periostracum olive-brown, thin, translucent, with widely spaced spiral rows of tufted lines.

Habitat and Habits: In 70-525 m.

Discussion: C. dayriti resembles C. articulatus and C. aphrodite most closely. C. articulatus can be distinguished by its characteristic white shoulder edge with regularly spaced brown spots, higher spire (RSH 0.16-0.30), distinctly tuberculate first 3-6 postnuclear whorls, and by the absence of spiral grooves on its teleoconch sutural ramps. For comparison with C. aphrodite, see the Discussion of that species. Specimens from New Caledonia (Pl. 52, Fig. 15) differ from Philippine specimens (Pl. 52, Figs. 11-14) by their broader larval shell, slightly stepped spire whorls, and often pure white colouration. We provisionally assign them to C. dayriti.

C. dayriti 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.