Skip to main content Skip to main navigation menu Skip to site footer
Published: 2022-11-24

A new species of the grenadier genus Coelorinchus from the seamounts in the southeastern Atlantic Ocean, with redefinition of C. vityazae (Teleostei: Gadiformes: Macrouridae)

A. N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii prospekt 33, Moscow 119071, Russia.
Section of Ichthyology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco CA 94118 U.S.A.
P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovsky prospekt 36, Moscow 117218, Russia.
Pisces Deep-sea fish taxonomy submarine rises Southern Hemisphere


Re-investigation of the grenadier Coelorinchus vityazae endemic to the West Wind Drift Islands Province reveals species-level differences between the populations from the southeastern Atlantic and southwestern Indian oceans. The southeastern Atlantic populations (from Discovery and Gough seamounts) are described as a new species, C. inventionis sp. nov., characterized by a moderately short snout (27.7–33.9 % HL, vs. 32.0–38.7 % in C. vityazae) tipped with short, weakly tripartite terminal scute (vs. triangular and sharply pointed); uniformly thick, unpigmented lips (vs. fleshy, partly blackish upper lip with lateral portions expanded at middle in C. vityazae); modally i+17 or i+18 pectoral-fin rays (vs. i+15 or i+16), and anal-fin rays conspicuously darkened distally (vs. uniformly and finely peppered). Statistically significant differences between these two species were found for 28 of 39 morphometric characters. The Discovery and Gough specimens show a drastic difference in size of the light organ, which may reflect an initial stage of speciation within C. inventionis sp. nov. Iwamoto & Graham’s (2008) key to the species of the C. fasciatus group is modified for inclusion of the new species.



  1. Clarke, K.R. & Gorley, R.N. (2006) PRIMER v6: User Manual/Tutorial. PRIMER-E, Plymouth, 190 pp.
    Clarke, K.R. & Warwick, R.M. (2005) Primer-6 computer program. Natural Environment Research Council, Plymouth. Available from: 01/07/2020 (accessed 8 November 2022)
    Collette, B.B. & Parin, N.V. (1991) Shallow-water fishes of Walters Shoals, Madagascar Ridge. Bulletin of Marine Science, 48 (1), 1–22.
    Dubois, A. (2007) Genitives of species and subspecies nomina derived from personal names should not be emended. Zootaxa, 1550, 49–68.
    Duhamel, G. (1999) Deep-sea demersal ichthyofauna off the St. Paul and Amsterdam islands (central southern Indian Ocean). In: Séret, B. & Sire, J.-Y. (Eds.), Proceedings of the 5th Indo-Pacific Fish Conference, Nouméa, 3–8 November 1997. Sociéte Française d’Ichthyologie & Institut de Recherche pour le Dévelopment, Paris, pp. 185–194.
    Iwamoto, T. (1970) The R/V Pillsbury deep-sea biological expedition to the Gulf of Guinea, 1964–65. 19. Macrourid fishes of the Gulf of Guinea. Studies in Tropical Oceanography, 4, 316–431.
    Iwamoto, T. & Anderson, M.E. (1994) Review of the grenadiers (Teleostei: Gadiformes) of southern Africa, with descriptions of four new species. Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology, 61, 1–28.
    Iwamoto, T. & Graham, K.J. (2008) Two new Australian grenadiers of the Coelorinchus fasciatus species group (Macrouridae: Gadiformes: Teleostei). Proceedings of the California Academy of Sciences, 59, 133–146.
    Iwamoto, T. & Sazonov, Y.I. (1988) A review of the southeastern Pacific Coryphaenoides (sensu lato) (Pisces, Gadiformes, Macrouridae). Proceedings of the California Academy of Sciences, 45, 35–82.
    Iwamoto, T., Shcherbachev, Y.N. & Marquardt, B. (2004) Grenadiers (Gadiformes, Teleostei) of Walters Shoals, southwestern Indian Ocean, with description of a new “West-Wind Drift species. Proceedings of the California Academy of Sciences, 55, 190–207.
    McCann, C. & McKnight, D.G. (1980) The marine fauna of New Zealand: macrourid fishes (Pisces: Gadida). New Zealand Oceanographic Institute Memoir, 61, 1–91.
    McMillan, P.J., Francis, M.P., James, G.D., Paul, L.J., Marriott, P.J., Mackay, E., Wood, B.A., Griggs, L.H., Sui, H., & Wei, F. (2011) New Zealand fishes. Vol. 1. A field guide to common species caught by bottom and midwater fishing. New Zealand Aquatic Environment and Biodiversity Report, 68, 1–329.
    Nakayama, N., Matsunuma, M. & Endo, H. (2016) Redescription of Coelorinchus tokiensis (Steindachner and Dӧderlein 1887) (Actinopterygii: Gadiformes: Macrouridae), with comments on its synonymy. Ichthyological Research, 63, 247–259.
    Okamura, O. (1970) Studies on the macrouroid fishes of Japan. Morphology, ecology and phylogeny. Reports of the Usa Marine Biological Station, 17(1–2), 1–179.
    Sabaj, M.H. (2022). Codes for Natural History Collections in Ichthyology and Herpetology (online supplement). Version 9.0 (14 February 2022). Electronically accessible at, American Society of Ichthyologists and Herpetologists, Washington, DC.
    Wierzchoń, S.T. & Kłopotek, M.A. (2018) Modern algorithms of cluster analysis. Studies in big data 34. Springer, Cham, xx + 421 pp.