Revised 24 Nov. 2025
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Idiolophorhynchus Sazonov 1981 ídios (ἴδιος), distinct, and lóphos (λόφος), mane or crest, referring to “distinct crests on the head”; rhynchus, from rhýnchos (ῥύγχος), snout, perhaps referring to its long, pointed, dorsoventrally flattened snout and/or a abbreviated references to Trachyrhynchus (=Trachyrincus), type genus of family

Idiolophorhynchus andriashevi Sazonov 1981 in honor of Russian ichthyologist Anatoly Petrovich Andriashev (1910–2009)

Macrouroides Smith & Radcliffe 1912 –oides, Neo-Latin from eī́dos (Gr. εἶδος), form or shape: described as a “Degenerate macrurid” (i.e., Macrouridae, a related family)

Macrouroides inflaticeps Smith & Radcliffe 1912 inflatus (L.), puffed up or swollen; -ceps (Neo-Latin), headed, referring to its “very large, ellipsoidal” head

Squalogadus Gilbert & Hubbs 1916 squalus (L.), dirty or filthy (i.e., squalid), and an ancient Latin name for marine fishes considered unfit for human consumption, including sharks, used here as a general term for shark, allusion not explained, possibly referring to prickly scales that resemble denticulate skin surfaces of most sharks; gadus, from gádos (γάδος), a hake, cod or similar gadiform fish

Squalogadus modificatus Gilbert & Hubbs 1916 Latin for modified, allusion not explained, possibly referring to its huge bulbous head, which appears to be an extreme example of morphological change (i.e., modified) from a basically cod-like body plan

Trachyrincus Giorna 1809 trachýs (τραχύς), jagged or rough, rhynchus, from rhýnchos (ῥύγχος), snout, referring to rough scales, with a median serrated ridge, on head and snout of T. scabrus

Trachyrincus aphyodes McMillan 1995 aphyṓdēs (ἀφυώδης), derived from aphýē (ἀφύη), small white fry, i.e., fry-like but also used to mean whitish, referring to its grayish white body and reflecting its common name, White Rattail

Trachyrincus helolepis Gilbert 1892 hêlos (ἧλος), wart or callus; lepís (λεπίς), scale, referring to “tubercle-like” projection at center of scales

Trachyrincus longirostris (Günther 1878) longus (L.), long; rostris, Neo-Latin scientific adjective of rostrum (L.), snout, referring to how snout is “produced into a long flattened process, pointed anteriorly, and not quite twice as long as the large eye”

Trachyrincus murrayi Günther 1887 in honor of John Murray (1841–1914), Canadian-born Scottish marine biologist (and later founder of modern oceanography), who discovered this species during the cruise of the Knight Errant in the Faröe Channel, North Atlantic (1880)

Trachyrincus scabrus (Rafinesque 1810) from scaber (L.), rough, referring to its rough scales, with a median serrated ridge, on head and snout

Trachyrincus villegai Pequeño 1971 in honor of marine biologist Luis Villegas, Department of Fisheries, University of Valparaiso (Peru), who examined two specimens of this species and told Pequeño they were unfamiliar