Maculauger sudchinensis Malcolm, Terryn & Fedosov 2019, newspecies

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.