BOUCHET, Fedosov & Puillandre & Herrmann & Kantor & Oliverio & Dgebuadze & Modica & Bouchet, 2018

KANTOR & BOUCHET GEN. NOV.

( FIGS 17I, 18I–L)

Type species: Fusidomiporta ponderi sp. nov.; OD, herein.

Diagnosis: As the genus is established primarily based on the molecular data, and its recognition based on the morphology is problematic, we do not provide a formal diagnosis.

Description (based on type species): Shell small (about 25 mm), fusiform, heavily sculptured, with rather high spire and stout siphonal canal. Protoconch multispiral, of three or more whorls usually strongly corroded or missing. Suture canaliculated; subsutural shelf well developed, rather narrow, bordered by projecting margin of adapical spiral cord. Sculpture of strong, elevated, gemmate spiral cords separated by deep interspaces; microsculpture of fine growth lines in interspaces between spiral cords. Spiral cords become distinctly beaded on penultimate and last adult whorls, forming rows of closely set, axially expanded, glossy granules. Siphonal rather long and stout, slightly recurved. Aperture elongate, its outer lip gently convex throughout its height, wavy, reflecting arrangement of spiral cords. Inner lip strongly calloused, reflected, with three strong oblique columellar folds at its mid-height. Rachidian and laterals multicuspidate, of about same width.

Distribution: Indo-Pacific, bathyal depths in about 400– 500 m.

Species included: Fusidomiporta ponderi sp. nov. 1,? F. suturata (Reeve, 1845) 3 comb. nov.

Etymology: The name Fusidomiporta reflects the close affinity of the new genus to Domiporta and refers to the fusiform shell of the type species. Gender feminine.

Remarks: Morphologically, F. ponderi sp. nov. falls within the range of variation seen in Profundimitra gen. nov., both in the shell and radula, and we even initially thought that specimen IM-2013-40665 (now the holotype of F. ponderi ) was conspecific with IM-2007- 35711 (an unknown species of Profundimitra ). The molecular distinctiveness of F. ponderi sp. nov. was thus totally unexpected. However, none of the single-gene analyses placed F. ponderi sp. nov. in the same molecular clade as Profundimitra , and a Fusidomiporta – Profundimitra grouping is only present in the three gene-based tree. Thus, the genus is largely defined by molecular characters; the morphological basis for the separation between Fusidomiporta and Profundimitra needs to be more carefully elaborated, for which more specimens need to be examined.

A sculpture pattern close to that present in Fusidomiporta gen. nov. is also observed in species of Gemmulimitra gen. nov. ( G. neocaledonica sp. nov. and G. boucheti ); however, Gemmulimitra differs notably from Fusidomiporta in radula morphology, showing a classical mitrid radula with a narrow rachidian ( Fig. 20F, G).

GENUS CANCILLOPSIS FEDOSOV, HERRMANN ,