Conus letourneuxi (Merle, 2026)



Description (1)

Shell moderately large, with very low conical spire. Apical angle 118°. Teleoconch of 9 whorls, whorl tops smooth delimited by a shoulder very slightly lower than the suture. Suture moderately impressed. Subsutural sinus deep, strongly curved, strongly asymmetrical. Last whorl with concave subsutural platform, slighlty angled at shoulder placed below suture, regularly conical below, position of maximum diameter close below shoulder, not constricted at base. Siphonal fasciole weakly developed. Weak, close set spaced cords from the base to the center of last whorl and fasciole. Aperture relatively narrow with parallel sides, hardly widening abapically; siphonal canal short. Colour pattern poorly preserved consisting large dark triangular spots surrounded by light yellow fluorescent bands under UV light.

Comparisons (1)

The residual colour pattern of Conus (Conus) letourneuxi n. sp. (Fig. 13C, D) is reminicent to that of Conus (Conus) marmoreus (Linneaus, 1758), Conus (Conus) bandanus Hwass in Bruguière, 1792 and Conus (Eugeniconus) marchionatus Hinds, 1843. The shells of C. (C.) marmoreus and C. (C.) bandanus have a crenulated spire, whereas that of C. (C.) letourneuxi n. sp. is smooth. C. (E.) marchionatus displays a smooth spire, but it is flatter than that of C. (C.) letourneuxi



Conus letourneuxi
A-D, holotype, MNHN.F.A98436
mm. 70,5
Plio-Pleistocene
French Polynesia, Niau At­oll, “La Piscine”






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