Described in French (click French flag)

Shell up to 66 mm in length with small, shouldered protoconch of 2-2.25 whorls (Fig. 22R) and weakly convex teleoconch whorls. Axial sculpture of last teleoconch whorl consisting of 3 rounded, frondose and weakly webbed varices. Other axial sculpture of 2 or 3 intervarical nodose cords. Spiral sculpture of strong, broad, low primary, secondary and tertiary cords. Spiral sculpture of subsutural ramp of last whorl with abis, IP followed by P1, s1, P2, s2, P3, t, s3, t, P4, s4, P5, P6, s6, ADP, MP, ABP, (abs) on convex part of shell and siphonal canal.
Aperture ovate. Columellar lip smooth. Outer lip with split, elongate, narrow denticles within. Siphonal canal short, broad, ventrally narrowly open, with 3 or 4 webbed spines, ABP, MP, ABP and abs. Yellowish to pale brown with 2 or 3 brown spiral bands on last whorl and numerous brown blotches on shell surface. Aperture white.

This species was previously known as Naquetia trigonulus (Lamarck, 1816), but this name is actually a junior synonym of Naquetia triqueter (Born, 1778).
Lamarck (1822) realized that the Murex trigonulus he described in 1816 was a synonym of N. triqueter. Then, in 1822, considering that this name was no longer used and once again available, he used the same name Murex trigonulus in a description for this species. A lectotype (Fig. 22G-H) was designated by Finet and Houart (1989). This second Murex trigonulus is a junior homonym of the first 1816 name and is therefore invalid.
As such, the first available and valid name for this species is Murex cumingii A. Adams, 1853. See Finet & Houart (1989) for a detailed history.

Type locality. Murex cumingii: Philippine Islands; Murex trigonulus: Unknown; Murex triqueter var. amanuensis: Amanu, Tuamotu, French Polynesia.
Distribution. Indo-W. Pac. (IP); C. Pac. From southwestern Madagascar eastwards throughout the Indian and Pacific oceans, with Tuamotu Archipelago as the eastern limit.