Where the snails have no name: a molecular phylogeny of Raphitomidae (Neogastropoda: Conoidea) uncovers vast unexplored diversity in the deep seas of temperate southern and eastern Australia Author Criscione, Francesco Author Hallan, Anders Author Puillandre, Nicolas Author Fedosov, Alexander text Zoological Journal of the Linnean Society 2021 191 961 1000 journal article 0024-4082 DB1E4C0F-C529-4F51-973E-D8ED6D84DDFD BICONITOMA GEN. NOV. Z o o B a n k r e g i s t r a t i o n: u r n: l s i d: z o o b a n k. org:act: 8D2E3C5F-173F-40AB-95A1-BFBA222BEB04 . Type species: Biconitoma cretosa . OD, herein. Etymology: The name is composed of the Latin biconus , two cones, for its biconical shell shape) and Ancient Greek τόμος, a piece, referring to the genus Raphitoma . The gender is femine. Diagnosis Shell ( Fig. 3D ) fusiform-biconical, opaque. Teleoconch of about five whitish whorls. Spire whorls broad, with wide subsutural ramp and rounded whorl periphery. Subsutural ramp with three or four equally distanced spiral threads, whorl periphery with rounded opisthocline folds and prominent spiral cords throughout height of whorl. Siphonal canal straight, tapering. Aperture elongate,> 50% of shell length. Anal sinus wide, deeply U-shaped. Cephalic tentacles slightly tapering; eyes absent. Radula ( Fig. 6G ) of tightly rolled hypodermic teeth with sharp, relatively short blade and triangular adapical opening. Tooth base broad, with weak lateral process and coarse texture. Ligament large, broad.