The Hymenocephalus longiceps lives in the benthopelagic, marine, depth range 490 - 570 m environment.
Hymenocephalus longiceps Smith and Radcliffe in Radcliffe, 1912 - valid Hymenocephalus longipes Smith and Radcliffe in Radcliffe, 1912 - valid Hymenocephalus striatissimus torvus Smith and Radcliffe in Radcliffe, 1912 - valid Hypopleuron Smith and Radcliffe More
Wanidara in Japanese (日本語)