Parabuccinum Harasewych, Kantor & Linse 2000

“Genus Parabuccinum, new genus

Type species.–Chlanidota bisculpta Dell, 1990.

Description. Shell small for family, reaching 10.2-16.4 mm, depending on spe­cies. Shell relatively thick, solid, elongate or elongate-ovate in outline, spire high (about 0.33 to 0.5 SL). Spiral sculpture of thin to prominent low cords. Axial sculp­ture ranges from fine growth lines to prom­inent, sigmoidal, weakly prosocline ribs, depending on species. Aperture narrowly oval. Siphonal notch broad, slightly recurved dorsally, abaxial margin may form ridge along fasciole. Periostracum thin, smooth or finely hirsute, covering most of shell. Operculum large (0.53-0.60 AL), ovate, paucispiral, with nucleus rotated clockwise, nearly 180° along long axis of operculum. Proboscis of moderate length. Radular ribbon long, triserial. Rachidian tooth with 3 large cusps (central cusp larg­est) emerging from shallowly arched, straight-sided basal plate. Lateral teeth with 3 cusps, outer cusp longest, middle cusp shortest, closely adjacent to innermost cusp. Salivary glands small, fused. Valve of Lei­blein well defined. Gland of Leiblein very small, tubular. Stomach broadly U-shaped, without caecum. Penis long, with flattened distal surface, bordered by thickened edge. Papilla long, cylindrical, situated in middle of distal surface, surrounded by very nar­row circular fold at its base.

Remarks.—Conchologically, species of Parabuccinum somewhat resemble juve­nile specimens of Chlanidota, but differ in having shells that are more slender and have a large, invariably well preserved protoconch, a relatively tall spire, and a very thin periostracum. In contrast, the protoconch of Chlanidota remains un­known, despite the large number of spec­imens (including juveniles <10 mm SL) that were studied (Harasewych & Kantor, 1999). Anatomically, Parabuccinum dif­fers from Chlanidota in having a propor­tionally larger, paucispiral operculum, a very long and thin-walled siphon, a very small gland of Leiblein, a penis with a flat­tened distal surface with a thickened edge, and a stomach that overlies a portion of the esophagus.

There are some conchological similari­ties between this new genus and Buccinella jucunda (Thiele, 1912), which differs in having a prosiphiine radula (Thiele 1912: pl. 16, fig. 13) and an operculum with a terminal nucleus (pl. 13, fig. 20). Parabuc­cinum, especially P. eltanini, also resembles Neobuccinum eatoni (Smith, 1875) in gen­eral shell outline, operculum and proto­conch morphology.

Parabuccinum is endemic to the Magel­lanic Province, and has a bathymetric range of 247 to 2165 m.”

(Harasewych, et al., 2000: 543-544)

Parabuccinum is a genus of sea snails, marine gastropod mollusks in the family Buccinulidae.

Parabuccinum is een geslacht van weekdieren uit de klasse van de Gastropoda (slakken).

Parabuccinum là một chi ốc biển, là động vật thân mềm chân bụng sống ở biển trong họ Buccinulidae.