Black Membranehead, Hymenocephalus fuscus McMillan & Iwamoto 2014
Holotype of the Black membranehead, Hymenocephalus fuscus, from the Wanganella Bank, Tasman Sea, New Zealand, depth 850 m, CSIRO H 6181-01 (29 mm HL, 133+ mm TL). Source: Carl Struthers, Museum of New Zealand, Te Papa Tongarewa. License: All rights reserved
Summary:
A darkly pigmented membranehead with 11–12 pelvic fin rays, enlarged bony ridges on the dorsal aspects of the head, no chin barbel, and few (16–19) gill rakers on the inner side of the first arch.
Cite this page as:
Dianne J. Bray, Hymenocephalus fuscus in Fishes of Australia, accessed 20 Apr 2024, https://fishesofaustralia.net.au/home/species/5096
Black Membranehead, Hymenocephalus fuscus McMillan & Iwamoto 2014
More Info
|
Distribution |
Known from the Wanganella Bank, West Norfolk Ridge, in the Tasman Sea within the Australian EEZ, off the northeast and north coasts of North Island, and the northwest Challenger Plateau. |
|
Features |
Pelvic-fin rays 11–12, gill rakers first arch (outer/inner) 12–15/16–19, barbel absent or minute, orbit diameter 20–33 % HL, body depth 70–85 % HL, suborbital width 23–28 % HL, snout length 25–33 % HL, upper jaw length 38–48 % HL. |
|
Colour |
Head including lower jaw and trunk below pectoral fin blackish. Nape, trunk dorsally, and tail brownish, peppered with melanophores with darker margins of scale pockets. All fins blackish. Roof of mouth greyish, tongue whitish, floor of mouth greyish with two paler longitudinal streaks below tongue on each side of mid-line. Branchial cavity blackish. |
|
Similar Species |
Differs from Hymeocephalus atterimus in having lower gill raker counts (first and second arches, lateral and medial series). |
|
Etymology |
The specific name is from the Latin fuscus, meaning 'swarthy', in reference to the overall dark colouration. |
|
Species Citation |
Hymenocephalus fuscus McMillan & Iwamoto 2014, Zootaxa 3856(1): 118, Figs. 1-2. Type locality: Tasman Sea, Wanganella Bank, 30°15'S, 167°23'E to 30°15'S, 167° 24' E, depth 850 metres. |
|
Author |
Dianne J. Bray |
Black Membranehead, Hymenocephalus fuscus McMillan & Iwamoto 2014
References
McMillan, P. & T. Iwamoto. 2014. Descriptions of four species of grenadier fishes of the genera Hymenocephalus and Hymenogadus (Teleostei, Gadiformes, Macrouridae) from the New Zealand region and Tasman Sea, including two new species of Hymenocephalus. Zootaxa 3856(1): 117-134.
