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

KANTOR & BOUCHET SP. NOV.

( FIGS 17G, 18A–C)

Type data: Holotype: MNHN IM-2013-40651, Papua New Guinea, North of Rabaul , BIOPAPUA Stn CP 3671, 04°04′S, 151°56′E, 585–601 m, lv, 24.15 mm ( Figs 17G, 18A, B) GoogleMaps . Paratype: MNHN IM-2013-58429, KAVIENG 2014 Stn CP 4449, 02°10′S, 150°11′E, 623– 908 m, lv, 35.5 mm GoogleMaps .

Other material examined: Papua New Guinea, BIOPAPUA Stn 3736, off Lancasay, 08°14′S 150°32′E, 760–769 m, 1 lv (21.5 mm); PAPUA NUIGINI Stn CP 3979, North of Bagabag Is. , 04°44′S 146°11′E, 540–580 m, 1 lv ( MNHN IM-2013-19698, 25.75 mm); Stn CP 3994, North from Cape King William, 06°00′S 147°35′E, 648–652 m, 1 lv ( MNHN IM-2013-19833, 33.6 mm); MADEEP Stn DW 4321 08°39′S 151°47′E, 612 m, 1 lv ( MNHN IM-2013-45873).? NEW CALEDONIA, BATHUS 3 Stn DW 790, 23°49′S 169°48′E, 685–715 m, 17.9 mm; Norfolk Ridge, BATHUS 4 Stn DW 920 18°45′S 163°17′E, 610–620 m, 15.1 mm ( Fig. 18C) GoogleMaps .

Description: Shell medium sized (holotype 24.15 mm, paratype 35.5 mm), fusiform, with high, cyrtoconoid, slightly tilted spire and rather short siphonal canal. Protoconch pointed, subcylindrical, of two or more whorls (corroded in all specimens studied). Teleoconch of 7.5 gently convex whorls, suture linear, distinctly impressed. First teleoconch whorls with reticulate sculpture formed by four low, very weak, rounded spiral cords, intersected by even weaker rounded spiral folds. Interstices rather deep, forming characteristic pattern of four spirally aligned punctures, well pronounced on two succeeding whorls and rather gentle, widely spaced on later whorls. Penultimate whorl with three distinct spiral rows of punctures on adapical portion, followed by three very weak rows below. Last adult whorl evenly convex, gradually extending to rather short, straight tapering siphonal canal. Adapical portion and periphery of last adult whorl sculptured with ten spiral rows of punctures. On shell base spiral rows of punctures becoming denser, as well as punctures themselves merging to form narrow grooves on abapical part of shell base and strong, oblique grooves on siphonal canal.

Siphonal canal slender, moderately long, tapering, not notched at its tip. Aperture rather low, lanceolate, its outer lip thin, evenly convex. Inner apertural lip evenly concave in its adapical half and straight below, with three oblique columellar folds at mid-height, slightly deepened in aperture and weak in appearance.

Shell colouration uniformly pale-yellowish; microsculpture of very fine collabral growth lines.

Radula (of holotype) 0.7–0.75 mm long, 0.14 mm wide, consisting of about 85 rows. Rachidian about 40 µm and laterals 45 µm wide, all three similar, with evenly convex anterior margin, bearing 12–13 moderately long, pointed subequal cusps, those at teeth margins smaller than others.

Distribution: Bismarck Sea off mainland New Guinea and New Ireland; East of New Caledonia, Norfolk Ridge, 580– 760 m.

Etymology: The species named after our friend and colleague John D. Taylor of the NHMUK in recognition of his immense contribution to malacology, and in particular to our knowledge of mitrid feeding biology.

Remarks: Profundimitra taylori sp. nov. can be readily distinguished from its congeners by its almost smooth shell with faint columellar folds; both features are rather characteristic of Eumitra . Members of the latter genus, however, are characterized by more convex whorls, often with subcylindrical early teleoconch whorls. Smooth species of Calcimitra , such as C. labecula , resemble P. taylori sp. nov. in shell proportions and sculpture; however, Calcimitra species can be recognized by their generally larger shells with strong columellar folds and, typically, by the presence of a siphonal notch. Finally, the smooth shallow-water Quasimitra sarmientoi , although close to P. taylori sp. nov. in shell proportions and lack of sculpture, can be differentiated by the intensely coloured shell and distinct siphonal notch in adult specimens. Apart from the mentioned shell characters, the characteristic radula with similar laterals and rachidian differentiates P. taylori sp. nov. and its congeners from most other mitrids.

FUSIDOMIPORTA PONDERI FEDOSOV, HERRMANN ,