Habitat: it is an infralittoral species. It seems it prefers muddy-detrital bottoms. Distribution: common all over the Mediterranean.
Notes: shell solid, bright. Sculpture made by one dozen of solid axial ribs crossed by spiral little cords making spine prominences once they cross. Deep suture. Siphonal canal short with the end corresponding to columella, presenting tubercles dark brown in colour. Lip thickened and crenulated. Internally there can be noted some little teeth, the upper one more developed.Very characteristic colour pattern: it is made by quite delineated reddish spiral lines on a white yellowish ground. Ground of fresher specimens violaceous. Protoconch, brown in colour, made by about 3.5 whorls, the first of which is smooth, the other ones completely reticulated., on the last one there is one large carina. Operculum missing.
It can be confused with R. aequalis (Jeffreys, 1867) only which is however really less exasperated in sculpture, with some spiral little cords non originating spinulosities. Moreover it is lighter in colour pattern, apex included. The adult specimens average measures are around 8-9 mm in height.