Updated 6 Dec. 2024
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Bathylagichthys Kobyliansky 1986 Bathylagus, referring to external similarity to that genus (also genus in which B. greyae and B. longipinnis had previously been placed); ichthýs (Gr. ἰχθύς), fish

Bathylagichthys australis Kobyliansky 1990 Latin for southern, referring to its occurrence in the Southern Hemisphere

Bathylagichthys greyae (Cohen 1958) in honor of Marion Grey (1911– 1964), Chicago Natural History Museum, for her contributions to the study of deep-sea fishes

Bathylagichthys kobylianskyi Gon & Stewart 2014 in honor of Stanislav Kobyliansky, P. P. Shirshov Institute of Oceanology (Moscow), for his contribution to the systematics of the family Bathylagidae

Bathylagichthys longipinnis (Kobyliansky 1985) longus (L.), long; pinnis, Neo-Latin adjective of pinna (L.), fin, i.e., finned, referring to longer pectoral fins (extending beyond dorsal-fin origin) compared with B. greyae (not extending beyond dorsal-fin origin)

Bathylagichthys parini Kobyliansky 1990 in honor of Nikolai Vasil’evich Parin (1932–2012), Russian Academy of Sciences, for his contributions to ichthyology

Bathylagichthys problematicus (Lloris & Rucabado 1985) from problēmatikós (Gr. προβληματικός), problematical, referring to the “difficulties that were encountered when studying the specimens” (these difficulties included unstable nomenclature, uncertain higher-level classification, scarce literature, unavailable type specimens of related taxa, and a year-long editor-driven delay in getting the description to press; Domingo Lloris, pers. comm.)

Bathylagoides Whitley 1951 –oides, Neo-Latin from eī́dos (Gr. εἶδος), form or shape: proposed as a subgenus of Bathylagus, distinguished by a deeper body and fewer anal-fin rays

Bathylagoides argyrogaster (Norman 1930) árgyros (Gr. ἄργυρος), white metal (i.e., silver); gastḗr (Gr. γαστήρ), belly or stomach, described as brownish above and silvery below

Bathylagoides nigrigenys (Parr 1931) nigri-, from niger (L.), dark or black; génys (Gr. γένυς), jaw (usually the cheek or lower jaw in ichthyology), referring to jet-black peritoneum and inner lining of mouth and gill cavity, conspicuously visible through gill cover, “which therefore appears to be of a highly lustrous black hue”

Bathylagoides wesethi (Bolin 1938) in honor of Lars Weseth (1895–1982), California Department of Fish and Game, captain of the Albacore, onto which holotype was collected, for “helpfulness and cooperation which he unfailingly extends to scientists working on board his vessel”

Bathylagus Günther 1878 bathýs (Gr. βαθύς), deep, referring to deep-sea habitat of B. antarcticus and B. atlanticus; lagus, from lagṓs (Gr. λαγώς), hare, allusion not explained, possibly referring to large rabbit-like eyes

Bathylagus andriashevi Kobyliansky 1986 in honor of Russian ichthyologist Anatoly Petrovich Andriashev (1910–2009), for his “great” (translation) contribution to the study of fishes from the Southern Ocean

Bathylagus antarcticus Günther 1878 –icus (L.), belonging to: Antarctic Ocean, type locality

Bathylagus atlanticus Günther 1878 –icus (L.), belonging to: South Atlantic, type locality

Bathylagus euryops Goode & Bean 1896 eurýs (Gr. εὐρύς), wide or broad; ṓps (Gr. ὦψ), eye, referring to diameter of eye ½ length of head

Bathylagus longiceps Parr 1931 longus (L.), long; –ceps (Neo-Latin), headed, referring to “great length” of head compared with congeners known at the time [species inquirenda, provisionally included here]

Bathylagus niger Kobyliansky 2006 Latin for dark or black, referring to general dark coloration of body

Bathylagus pacificus Gilbert 1890 –icus (L.), belonging to: Pacific Ocean, off the coast of Washington (USA), type locality

Bathylagus tenuis Kobyliansky 1986 Latin for thin or slender, referring to its “strongly elongated” body (translation)

Dolicholagus Kobyliansky 1986 dolichós (Gr. δολιχός), long, referring to elongated body form of D. longirostris; lagus, from lagṓs (Gr. λαγώς), hare, apparently used here as a suffix for the family, from the type genus Bathylagus

Dolicholagus longirostris (Maul 1948) longus (L.), long; rostris, Neo-Latin scientific adjective of rostrum (L.), snout, referring to “much longer” snout compared with its presumed closest congener at the time, Bathylagus microcephalus (=Melanolagus bericoides)

Leuroglossus Gilbert 1890 leurós (Gr. λευρός), smooth; glossus, from glṓssa (Gr. γλῶσσα), tongue, referring to toothless tongue compared with toothed tongue of Argentina (Argentinidae), its presumed relative at the time

Leuroglossus callorhini (Lucas 1899) of Callorhinus ursinus, Northern Fur Seal, which “extensively” feeds on this species, from whose stomach type material was collected; “Owing to the tenderness and small size of this fish, it is so quickly acted on by the gastric juice that nothing but bones remained of the many hundred specimens that were seen and while evidently common, it can be described only from the skeleton”

Leuroglossus schmidti Rass 1955 in honor of Russian ichthyologist Petr Yulievich Schmidt (1872–1949), “famous researcher of the far Eastern seas” (translation), who first noted how this species differed from L. stilbius in a posthumous publication (1950)

Leuroglossus stilbius Gilbert 1890 from stilbo (Gr. στίλβω), shining, presumably referring to its “right silvery” body, abdomen and sides of head

Leuroglossus urotranus Bussing 1965 uro, from ourá (Gr. οὐρά), tail; tranus, from trānós (Gr. τρᾱνός), clear or distinct, referring to its unpigmented caudal-fin rays (vs. darkly pigmented caudal-fin rays of L. stilbius)

Lipolagus Kobyliansky 1986 lípos (Gr. λίπος), fat (noun), referring to increased lipid content in body of L. ochotensis; lagus, from lagṓs (Gr. λαγώς), hare, apparently used here as a suffix for the family, from the type genus Bathylagus

Lipolagus ochotensis (Schmidt 1938) –ensis, Latin suffix denoting place: Okhotsk Sea, Kamchatka, Russia, type locality

Melanolagus Kobyliansky 1986 mélanos (Gr. μέλανος), genitive of mélas (μέλας), black, referring to black pigmentation of M. bericoides; lagus, from lagṓs (Gr. λαγώς), hare, apparently used here as a suffix for the family, from the type genus Bathylagus

Melanolagus bericoides (Borodin 1929) –oides, Neo-Latin from eī́dos (Gr. εἶδος), form or shape: combining characters of both “bericoid” (presumably Berycidae) and scopelid (Myctophidae) fishes, with large head, small mouth and short cleft of the former, and general form, scale shape and fins of the latter

Pseudobathylagus Kobyliansky 1986 pseudo-, from pseúdēs (Gr. ψεύδης), false, i.e., although this genus may externally resemble Bathylagus, such an appearance is false

Pseudobathylagus milleri (Jordan & Gilbert 1898) in honor of Walter Miller (1864–1949), linguist, classics scholar and archaeologist, Stanford University (California, USA), for his “intelligent interest” in zoological nomenclature (Miller reviewed and verified name etymologies in Jordan and Evermann’s Fishes of North and Middle America [1896-1900])