The shell is moderately small and narrowly spindle-shaped, becoming robust in adulthood. The spirewhorls are adorned with strong, widely spaced, rounded axial ribs, which become less pronounced or nearly absent on the final adult whorl. The spiral sculpture consists of low, flat-topped cords separated by narrow, variably incised grooves. The siphonal canal is elongated with a narrow, slit-like opening. In mature specimens, the aperture features a pronounced callus nodule just below the outer lip's insertion, along with a well-developed varix behind the outer lip.
The shell is orange-brown when fresh, with axial ribs typically appearing slightly paler. The aperture is whitish, while the animal itself is orange-red. [2]
Distribution
This marine species is endemic to South Africa and occurs off the Agulhas Bank (Still Bay to Port Alfred) at depths between 50 m and 150 m. [2]
Steyn DG and Lussi M. (2005). Offshore shells of southern Africa: A pictorial guide to more than 750 gastropods. published by the authors. p. 148.
Marais JP and Kilburn RN. (2010). Fasciolariidae. In: Marais AP and Seccombe AD (eds) Identification Guide to the Seashells of South Africa. Vol. 1. Groenkloof. Centre for Molluscan Studies. p. 136.
Stahlschmidt P. & Fraussen K. (2012). "Crassibougia, a new genus for Fusus clausicaudatus Hinds, 1844, from South Africa, with description of a new species (Gastropoda: Fasciolariidae)". Miscellanea Malacologica. 5 (5): 85–93.