Profunditerebra papuaprofundi Malcolm, Terryn & Fedosov, 2019

Fedosov, Alexander E, Malcolm, Gavin, Terryn, Yves, Gorson, Juliette, Modica, Maria Vittoria, Holford, Mandë & Puillandre, Nicolas, 2019, Phylogenetic classification of the family Terebridae (Neogastropoda: Conoidea), Journal of Molluscan Studies The Malacological Society of London 85 (4), pp. 359-388 : 25

Profunditerebra papuaprofundi Malcolm, Terryn & Fedosov newspecies

( Fig. 12A, B )

Type material: Holotype: MNHN IM-2013-58123 , 1 lv, 19.0 mm; off New Ireland, Papua New Guinea, 2 ° 21 'S, 150 ° 38 'E, 496–609 m (KAVIENG 2014 Stn CP4422). Paratype 1: MNHN IM-2013-45571 , 1 lv, 29.5 mm; W Buka I., N Bougainville, Papua New Guinea, 5 ° 43 'S, 154 ° 03 'E, 490–530 m (MADEEP Stn DW4278), Paratype 2: MNHN IM-2013-59946 , 1 lv, 25.6 mm; same locality. Paratype 3: MNHN IM-2013-59944 , 1 lv, 13.7 mm; same locality. Paratype 4: MNHN IM-2013-59945 , 1 lv, 16.3 mm; W Buka I., N Bougainville, 5 ° 35 'S, 153 ° 58 'E, 623–640 m (MADEEP Stn DW4271),. Paratype 5: MNHN IM-2013-45509 , 1 lv, 27.1 mm; W Buka I., N Bougainville, 5 ° 37 'S, 153 ° 59 'E, 421 m (MADEEP Stn DW4270). Paratype 6: MNHN IM-2013-30574 , 1 lv, 33 mm (broken); SW Santa Isabel I, Solomon Islands, 8 ° 24 'S, 159 ° 27 'E, 362–432 m (SALOMON 2 Stn CP2193).

Other material examined: Taiwan, 15 ° 03 'N; 116 ° 31 'E (NANHAI 2014 Stn DW4102), IM-2013-52276 , 1 lv.

Zoobank registration: urn:lsid:zoobank.org:act:ABAFB4A7-FCD6-4632-A07C-E9945D21EA7A

Diagnostic nucleotide positions: see Table 11 .

Description (holotype): Shell of moderate size, to 42 mm. Protoconch of 4 narrow, conical whorls with small nucleus. Teleoconch of 12 whorls; teleoconch whorl outline convex constricted abapically at the suture. Subsutural groove represented by weak indentation on early whorls becoming sharper groove cutting through the ribs on mature whorls. Sculpture of strong slightly convex narrow axial ribs on subsutural band aligned with those on succeeding portion of whorls, varying significantly between specimens in spacing, and in number from 18 to 25 (20 ribs on penultimate whorl). No spiral sculpture in interspaces except for striae on base below periphery. Last whorl cup-shaped, becoming more elongate on mature specimens. Aperture wide with slight callus; columella straight with 2 folds. Colour off-white with tinges of yellow or pink with shiny white columella.

Habitat: Depths of 350– 600 m.

Distribution: Papua New Guinea, Solomon Islands and Taiwan.

Etymology: Named after its deep-water habitat in Papua New Guinea.

Remarks: The only sequenced specimen of P. papuaprofundi n. sp. with intact protoconch was designated as the holotype. It is notably smaller than the sequenced paratypes, which reach shell lengths of 42 mm. The larger specimens demonstrate the increased curvature of ribs and increased number and density of ribs to 25 on the penultimate whorl. Profunditerebra papuaprofundi n. sp. is phylogenetically closest to P. orientalis and P. anseeuwi . Profunditerebra anseeuwi has a weaker subsutural groove, straight and oblique ribs and a mottled colour pattern. Profunditerebra orientalis has more axial ribs, a mottled colour pattern, and a sculpture of ribs and spiral cords creating nodes at their intersections. Specimens of P. papuaprofundi n. sp. with more numerous curving ribs are similar to Maculauger cinctella and Terebra textilis ( Salvador & Pickering, 2017). However, M. cinctella ( Fig. 12C ) has a shorter protoconch of 2.5 whorls, a much narrower noded subsutural band and many spiral striae within the interspaces between the ribs. In turn, T. textilis ( Fig. 12D ) differs in having a spiral groove defined by deep punctations or partially cutting the ribs, and has several spiral striae in the interspaces between the ribs.

Figures

Figure 12. Profunditerebra papuaprofundi n. sp., P. macclesfieldensis n. sp. and morphologically similar species. A. P. papuaprofundi holotype, MNHN-IM-2013- 58123, KAVIENG 2014 Stn CP4422, 02◦21'S, 150◦38'E, 496–609 m, 19.0 mm. B. P. papuaprofundi paratype 1, MNHN-IM-2013-45571, same locality, 29.5 mm. C. Terebra cinctella lectotype, NHMUK 197988/1, ‘Mouth of the Indus’, 27.8 mm.D. Terebra textilis lectotype, NHMUK 1844.6.7.80, ‘Str Macassar’, 25.7 mm. E. P.macclesfieldensis holotype, MNHN-IM-2013-61875, ZhongSha 2015 Stn DW4144, 16◦6'N, 114◦23'E, 160–200 m, 22.4 mm.F. P.macclesfieldensis paratype 1, MNHN-IM-2013-61877, same locality, 22.2 mm. G. P. anseeuwi holotype, MNHN-IM-2000-6224, Aliguay I., Philippines, 80–150 m, 29.8 mm.