Hymenocephalus fuscus McMillan & Iwamoto 2014

This species is distinguished by the following characters: pelvic fin rays 11-12; gill rakers first arch (outer/inner) 12-15/16-19; no or minute barbel; 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 % H; colour of head and trunk of fresh specimens blackish, tail brownish peppered with melanophores; large, oval, deciduous scales on body and tail (Ref. 97189).

暗黑膜首鱈，為輻鰭魚綱鱈形目鼠尾鱈科的其中一種，分布於西南太平洋紐西蘭北島西北部外海海域，屬深海底棲性魚類，深度549-1202公尺，體長可達14.8公分，棲息在底層水域，生活習性不明。