Shell small, up to 11 mm in length at maturity. Spire high with a protoconch of 1.5 whorls and up to 4 or 5 shouldered teleoconch whorls. Protoconch whorls smooth, rounded, ending with sharp, weakly erect terminal varix. Suture weakly impressed, largely obscured by axial lamellae of following whorl. First teleoconch whorl with 8 varices, second with 7, third and fourth with 6, last teleoconch whorl with 4 or 5 low, weakly spinose varices. Other axial sculpture consisting of numerous, frilled lamellae, covering the whole surface of shell. Spiral sculpture of last teleoconch whorl of 5 rounded, high cords, ending as 5 short, blunt, widely open spines on varices, usually interconnected webbing. Shoulder spine and last two abapical spines strongest. Former whorls with 2 spiral cords and small shoulder spine. Aperture large and ovate. Columellar lip smooth, rim erect abapically, adherent on small portion abapically. Anal notch obsolete. Outer lip apparently smooth but fragile and broken in all specimens. Siphonal canal short, open, with one small, open spinelet. Whitish with some traces of pale brown at shoulder, but all specimens dead collected.

Most similar to Muricopsis (Murexsul) interserratus (Sowerby, 1879) from Japan, Muricopsis (Murexsul) kieneri (Reeve, 1845), and Muricopsis (Murexsul) nothokieneri (Vokes, 1978), both from South Africa. Muricopsis interserratus differs in having more numerous varices, longer, adapically curved shoulder spines, comparatively smaller aperture, longer siphonal canal and broader shell. Muricopsis kieneri and M. nothokieneri both differ in having 8-10 varices on last teleoconch whorl, more numerous spiral cords, broader and smaller aperture, acute and keeled protoconch.

West of Garden Island, Western Australia