Maculauger sudchinensis 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 : 26-27

Maculauger sudchinensis Malcolm, Terryn & Fedosov newspecies

( Fig. 13D, E )

Type material: Holotype: MNHN IM-2013-61887 , 1 lv, 19.9 mm; N Macclesfield Bank, S China Sea, 16 ° 07 'N, 114 ° 23 'E, 161 m (ZhongSha 2015 Stn DW4144). Paratypes: N Macclesfield Bank, S China Sea, 16 ° 08 'N, 114 ° 19 'E, 180–226 m (ZhongSha 2015 Stn CP4145). Paratype 1: MNHN IM-2013-61902 , 1 lv, 20.2 mm. Paratype 2: MNHN IM-2013-61895 , 1 lv, 20.7 mm.

Other examined material: N Macclesfield Bank, S China Sea, 16 ° 07 'N, 114 ° 19 'E, 218–281 m (ZhongSha 2015 Stn CP4148), 2 dd.

Zoobank registration: urn:lsid:zoobank.org:act:BB5F5C93-C9FE-44F0-B1EC-C00AA31EFF23

Diagnostic nucleotide positions: Table 11 .

Description: Shell to 21 mm; narrow apical angle. Protoconch paucispiral, 1.5 translucent whorls. Teleoconch of holotype with 14 whorls; outline of whorls slightly convex. Subsutural band formed of deep pits. Axial ribs narrow with wide interspaces; ribs c. 18–20 on penultimate whorl, straight on subsutural band, becoming oblique at subsutural groove, then curved on abapical part of whorls. Axial ribs intersected by 2–3 evenly spaced spiral grooves. Aperture long, with straight columella. Ground colour chalkywhite, sometimes with vague brown marks on subsutural band.

Distribution: Only known from N Macclesfield Bank.

Habitat: Depths of 160– 220 m.

Etymology: Named after the South China Sea.

Remarks: Maculauger campbelli has a similar protoconch and slender overall shape with slightly convex whorls, but in comparison with M. sudchinensis n. sp. has a more continuous subsutural groove, less pronounced sculpture, with 5–7 spiral grooves and a distinctive pattern of straw colour with random square spots. Maculauger sudchinensis n. sp. is similar to Terebra helichrysum ( Fig. 13F ), which however has a much shorter curved columella, a multispiral protoconch of 3.5 whorls, shorter whorls and a mottled orange colour pattern. Terebra levantina ( Fig. 13G ) has similar sculpture, but its whorls are much shorter, with 4–6 spiral grooves and it has a mottled colour pattern.

Figures

Figure 13. Neoterebra guadeloupensis n. sp., Maculauger sudchinensis n. sp. and morphologically similar species. A. N. guadeloupensis n. sp. holotype, MNHN-2013- 61448, KARUBENTHOS 2015 Stn DW4638, 15◦50'N, 61◦18'W, 305–312 m, 17.2 mm. B. MNHN-IM-2013-20531, KARUBENTHOS 2012 Stn GD55, 16◦22.48'N, 61◦35.46'W, 85 m, 9.4 mm. C. Terebra limatula syntype, USNM93971, Apalachicola Bay, FL, 17.8 mm. D, E. M. sudchinensis n. sp., holotype, MNHN-IM-2013-61887, ZhongSha 2015 Stn CP4144, 16◦6'N, 114◦23'E, 160–200 m, 19.9 mm. F. Terebra helichrysum lectotype, NHMUK 1903.12.15.117, Mussandam, Persian Gulf, 47 fms (= 86 m), 24.5 mm. G. Terebra levantina holotype, MNHN-IM-2000-2812, MUSORSTOM 2 Stn CP59, 14◦00'N, 120◦16'E, 186–190 m, 24.2 mm.