Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan Author Iwamoto, Tomio Section of Ichthyology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA 94118, USA; Author Nakayama, Naohide Laboratory of Marine Biology, Faculty of Science, Kochi University, 2 - 5 - 1 Akebono-cho, Kochi, 780 - 8073, Japan; Author Shao, Kwang-Tsao Research Center for Biodiversity, Academia Sinica No. 128, Sec. 2, Academia Road, Nankang, Taipei 115, Taiwan; Author Table, Hsuan-Ching Ho text Proceedings of the California Academy of Sciences 2015 2015-04-15 62 3 31 126 journal article 299670 10.5281/zenodo.11512126 522b8de7-880d-40ca-803e-aa5a3a05c5f6 0068-547X 11512126 Genus Hymenogadus Gilbert and Hubbs, 1920 DISTINGUISHING FEATURES .— Snout low, relatively pointed and protruding; paired nasal bones in broad contact along median line, without gap around nostril cartilage; head about as broad as high; body and head somewhat cylindrical; head mucous canals moderately developed; head covering mostly transparent; light organ long, small lens on chest anterior to pelvic-fin bases connected by a black streak to round posterior lens immediately before anus; ventral striae well developed; fine black lines on gular membrane oriented perpendicular to median line, not netlike; inner GR-I, lower limb 10–16; spinous ray of 1D weakly serrated; chin barbel present. REMARKS .— Aside from the low, cylindrical body and head, pointed snout, fewer gill rakers, and the presence of serrations along the leading edge of the first dorsal fin, this genus is otherwise scarcely distinguishable from Hymenocephalus , in which it was originally included as a subgenus. Aside from the widely distributed H. gracilis , the genus contains only H. tenuis , which is known only from the single original record off Hawaii .