Hymenocephalus maculicaudus Mcmillan & Iwamoto, 2014, sp. n.

• Main Authors: Mcmillan, Peter, Iwamoto, Tomio
• Format: Other/Unknown Material
• Language: unknown
• Published: 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Actinopterygii; Gadiformes; Macrouridae; Hymenocephalus; Hymenocephalus maculicaudus; New Zealand; White Island
• Online Access: https://zenodo.org/record/6137617; https://doi.org/10.5281/zenodo.6137617

Hymenocephalus maculicaudus sp. n. Spottytail membranehead (Figures 4–7; Table 2) Hymenocephalus megalops (not of Iwamoto & Merrett 1997). Clark & Roberts, 2008: Appendix 4 (listed). Diagnosis. Pelvic fin rays 8 (rarely 7 or 9), gill rakers first arch (outer/inner) 10–16 / 16–20, chin barbel length 7–16 % HL, orbit diameter 33–48 % HL, snout length 20–28 % HL, orbit to preopercular length 34–45 % HL. Scattered melanophores ventrally on trunk and distinctive mid-lateral line of melanophores on tail that extends about a head length posterior to anal fin origin. Specimens examined. Holotype. AMS I 42737 -003 (23.9 mm HL, 161 mm TL), Tasman Sea, Lord Howe Plateau, 34 º 01.95' S, 162 º 35.96 ' E, 780–818 m, 25 May 2003, Tangaroa, NORFANZ stn. TAN0308-081, wing trawl. Paratypes (50: 12.9–26 mm HL, 63–163 mm TL). AMS I 42740 -002 (2: 19.8–21.9 mm HL, 116–142 mm TL), Tasman Sea, Lord Howe Plateau, 34 º 11.04 ' S, 162 º 39.11 ' E, 430–740 m, 26 May 2003, Tangaroa, NORFANZ stn. TAN0308-086. AMS I 42742 -003 (6: 24.6–25.5 mm HL, 85 +– 163 mm TL), Tasman Sea, Lord Howe Plateau, 34 º 12.18 ' S, 162 º 41.18 ' E, 748–772 m, 26 May 2003, Tangaroa, NORFANZ stn. TAN0308-089. CSIRO H 6044 - 16 (8: 18.5–24 mm HL, 88 +– 160 mm TL), Tasman Sea, Lord Howe Plateau, 34 º 01.95' S, 162 º 35.96 ' E, 780–818 m, 25 May 2003, Tangaroa, NORFANZ stn. TAN0308-081. NMNZ P. 0 13068 (12: 18.3–22.2 mm HL, 81 +– 149 mm TL), New Zealand, off Poor Knights Islands, 35 º 30 ' S, 174 º 44 ' E, 558–622 m, Marine Dept. Prawn Survey station 22, prawn trawl, 11 Nov 1962. NMNZ P. 013074 (7: 20.5–25.9 mm HL, 144 +– 156 mm TL), New Zealand, 22 miles north of Cape Brett; 34 º 51 ' S, 174 º 20 ' E, 732 m, Marine Dept. Prawn Survey station 30, prawn trawl, 22 Nov 1962. NMNZ P. 0 13080 (21 mm HL, 122 + mm TL), New Zealand, 8 miles east of White Island, 37 º 31 ' S, 177 º 26.5 ' E, 549–629 m, Dept. Prawn Survey station 14, prawn trawl, 30 Sep 1962. NMNZ P. 0 13083 (16.8 mm HL, 92 + mm TL), New Zealand, 8 km north of Mayor Island, 37 º 13 S, 176 º 20 ' E, 366 ...