Shell small sized for the genus, up to 4.5 mm in length, white, broadly biconical, spinose, nodose. Spire high with one protoconch whorl, and up to three broad, strongly angulate, spinose teleoconch whorls; suture impressed. Protoconch large, broad, whorl rounded, with rows of minute, raised granules on second part of protoconch (Figs 8, 9), terminal varix thin, weakly raised and curved. Axial sculpture of teleoconch whorls consisting of lamellae, ribs and varices: first whorl with seven or eight lamellae, second with four varices, third with three or four varices and three, or occasionally two, intervarical ribs. Spiral sculpture of high, strong, smooth, primary and secondary cords: visible part of first whorl with IP, Pl, P2; second whorl with IP, Pl, P2, P3, P4, (s4), P5, (P6); third whorl with IP, Pl, sl, P2, (s2), P3, P4, s4, P5, P6. P1—P4 ending as short, blunt, open spines on varices, more apparent on apertural varix. Aperture small, roundly ovate; columellar lip broad, flaring, smooth, firn partially erect, adherent at adapical extremity. Anal notch shallow, narrow. Outer lip weakly erect, smooth within. Siphonal canal moderately long, straight, narrowly open, smooth.
Radula : rachidian with short, projecting median cusp, two short lateral denticles, two long lateral cusps with small outer lateral denticle, and two short marginal cusps; lateral teeth sickle-shaped, narrow.

Murexsul charcoti (Houart, 1991) , from New Caledonia, is twice as long and broad for the same number of teleoconch whorls than M. queenslandicus; it also has a comparatively narrower apertural varix with broader and longer spines, lower and narrower axial ribs and different spiral sculpture consisting of Pl, (s1), P2, P3, P4, P5 atrophied, P6 present or atrophied, on last teleoconch whorl. Murexsul micra (Houart, 2001), also from New Caledonia, differs from M charcoti in its much smaller size and its different protoconch sculpture. It lives in much shallower depths, 20-35 m, compared with 394-450 m for M charcoti. Murexsul micra differs from M. queenslandicus in having a narrower apertural varix with broader spines, a more ovate aperture with a narrower columellar lip, axial intervarical lamellae instead of ribs and spiral sculpture identical to M charcoti.
These three taxa belong to a group of species distinguished from other Murexsul by their smaller shell with probable adults having less than five teleoconch whorls, and in having a broad, large protoconch of 1.0-1.5 whorls, indicating non-planktotrophic development.

Australia, Queensland, SE of Swain Reefs and Capricorn Channel, in 155-187 m.