Hymenocephalus nascens Gilbert & Hubbs 1920

• Main Authors: Mcmillan, Peter, Iwamoto, Tomio
• Format: Other/Unknown Material
• Language: unknown
• Published: 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Actinopterygii; Gadiformes; Macrouridae; Hymenocephalus; Hymenocephalus nascens; New Zealand; North Cape; Bray; Stripe; Napier; Bay of Plenty; Napier Island
• Online Access: https://zenodo.org/record/6137619; https://doi.org/10.5281/zenodo.6137619

Hymenocephalus nascens Gilbert & Hubbs 1920 Nascent membranehead (Figures 3, 8) Hymenocephalus nascens Gilbert & Hubbs, 1920: 535, Fig. 33 (Holotype: USNM 78229, vicinity of Sibuko Bay, Borneo, Albatross station 5587, depth 415 fathoms [759 m]). Hymenocephalus nascens: Iwamoto, 1990: 230 (listed). Iwamoto & Merrett, 1997: 523 –525, fig. 22 b (New Caledonian region). Iwamoto & Williams, 1999: 177 –178 (Western Australia). Iwamoto, 1999: 1991 (listed). Merrett & Iwamoto, 2000: 759, fig. 20 (Vanuatu, New Caledonia). Iwamoto & Graham 2001: 475 –476 (New South Wales). Bray et al. 2006: 596. Hymenocephalus sp. B: King et al., 2009: 531. Diagnosis (New Zealand specimens only). Pelvic rays 12–14 (elsewhere 11–13), total gill rakers first arch (outer/ inner) 17–22 / 23–28, second arch 22–28 / 22–26, chin barbel absent, orbit diameter 29–40 % HL, suborbital width 10–14 % HL, snout length 22–31 % HL, interorbital width 24–29 % HL. Most of orbit, upper surface of snout, sides of head and trunk silvery or pale, ventral aspects of head and trunk black. Prominent mid-lateral stripe of silvery (fresh) or brownish (preserved) pigment running along trunk and tail. Specimens examined (20: 15–33.4 mm HL, 66–182 mm TL, New Zealand only). NMNZ P. 0 18040 (25.2 mm HL, 122 + mm TL), North Island, RV James Cook, (data uncertain, might be JCO 8405 /032, Challenger Plateau), bottom trawl. NMNZ P.023552 (7: 28.3–33.3 mm HL, 103 +– 172 + mm TL), off 90 Mile Beach, 34 º 51.3 ' S, 172 º 3.1 ' E, 894 – 876 m, RV James Cook, JCO 8106 /057, bottom trawl, 24 Apr 1981. NMNZ P. 0 23553 (30 mm HL, 182 + mm TL), off Cape Runaway, Bay of Plenty, 37 º 27.1 ' S, 177 º 42.8 ' E, 815–843 m, RV James Cook, JCO 8106 / 0 18, bottom trawl, 17 Apr 1981. NMNZ P. 0 23554 (33.4 mm HL, 136 + mm TL), NE of North Cape, 34 º 11.7 ' S, 173 º 7.1 ' E, 903–975 m, RV James Cook, JCO 8106 /044, bottom trawl, 22 Apr 1981. NMNZ P. 0 34688 (4: 15–28.4 mm HL, 66 +– 150 + mm TL), off Napier Island, Kermadec Islands, 29 º 13 ' S, 177 º 52.4 ' W, 610 m, ...