Abstract
The rare deepsea ophidiid genus Leucicorus was described by Garman (1899) based on L. lusciosus Garman, 1899 caught in the East Pacific. Until 1973 only three additional specimens were caught of which two from the East Pacific belong to L. lusciosus and one from off Hawaiʽi is an undescribed species here described as L. lentibus n. sp. In 1973 a Soviet expedition to the Caribbean Sea trawled 18 specimens from abyssal and hadal depths and based on this material a second Leucicorus species was described, L. atlanticus Nielsen, 1975. Since then eight Leucicorus specimens from the Indo-Pacific and Atlantic Oceans have been caught of which two from the West Atlantic belong to a new species, L. gerringerae n. sp., herein described, four to L. atlanticus and two remain as Leucicorus sp. About 35 demersal Leucicorus specimens have been observed and photographed by ROV (remotely operated vehicle) at depths of 3804-5768 meters in the Pacific Ocean.
References
Bian, C., Li, R., Wen, Z., Ge, W. & Shi, Q. (2021) Phylogenetic analysis of core melanin synthesis genes provides novel insights into the molecular basis of albinism in fish. Frontiers in Genetics, 12 (Afrticle 707228) 1–9.
Drazen, J.C., Leitner, A.B., Jones, D.O.B. & Simon-Lledó, E. (2021) Regional variation in communities of demersal fishes and scavengers across the CCZ and Pacific Ocean. Frontiers in Marine Science, 8, 630616. https://doi.org/10.3389/fmars.2021.630616
Fricke, R. & Eschmeyer, W.N. (2021) Guide to fish collections. Available from: http://researcharchive.calacademy.org/research/ichthyology/catalog/collections.asp (accessed 3 August 2021).
Garman, S. (1899) The fishes. Memoirs of the Museum of Comparative Zoology, 24, 1–431.
Gerringer, M.E. (2019) On the success of the hadal snailfishes. Integrative Organismal Biology, 1, 1–18. https://doi.org/10.1093/iob/obz004
Gerringer, M.E., Linley, T.D. & Nielsen, J.G. (2021) Revision of the depth record of bony fishes with notes on hadal snailfishes (Liparidae, Scorpaeniformes) and cusk eels (Ophidiidae, Ophidiiformes). Marine Biology, 168 (167), 1–9. https://doi.org/10.1007/s00227-021-03950-8
Gregory, T., Lovalvo, D., Mohr, B., McLetchie, K. & Ryan, M. (2016) Advancing undersea technology. Oceanography, 29(1), Supplement, 52–55.
Grey, M. (1956) The distribution of fishes found below a depth of 2000 meters. Fieldiana: Zoology, 36 (2), 1–337.
Hureau, J.-C. & Nielsen, J.G. (1981) Les poissons Ophidiiformes des campagnes du N.O. ”Jean Charcot” dans l’Atlantique et la Mediterranée. Cybium, 5 (3), 3–27.
Kennedy, B.R.C., Cantwell, K., Malik, M., Kelley, C., Potter, J., Elliott, K., Lobecker, E., Gray, L.M., Sowers, D., White, M.P., France, S.C., Auscavitch, S., Mah, C., Moriwake, V., Bingo, S.R.D., Putts, M., & Rotjan, R.D. (2019) The unknown and the unexplored: insights into the Pacific deep-sea following NOAA CAPSTONE expeditions. Frontiers in Marine Science, 6, 480. https://doi.org/10.3389/fmars.2019.00480
Krishnan, J. & Rohner, N. (2017) Cavefish and the basis for eye loss. Philosophical Transactions of the Royal Society B, 372 (20150487), 1–10. https://doi.org/10.1098/rstb.2015.0487
Marshall, N.B. (1979) Developments in deep-sea biology. Blandford Press Ltd, Poole, Dorset, 566 pp.
Mesick, S., Gottfried, S., Reser, B. & Woodard, K. (2016) Applied excellence in data management. Oceanography, 29 (1), Supplement, 56–57.
Mesick, S., Gottfried, S. Wall-Bell, S.C. & Jackson, J. (2017) Exploring the ocean through data. Oceanography, 30 (1), Supplement, 48–49.
Mincarone, M.M., Nielsen, J.G. & Costa, P.A.S. (2008) Deep-sea ophidiiform fishes collected on the Brazilian continental slope, between 11° and 23° S. Zootaxa, 1770, 41–64.
Nielsen, J.G. (1974) List of ophidioid fishes from the 14th cruise of the “Akademik Kurchatov” with a new species of Aphyonus. Trudy Instituta Okeanologii, 100, 348–353. [translation No. 72 from NOAA, Washington, D.C.]
Nielsen, J.G. (1975) A review of the oviparous ophidioid fishes of the genus Leucicorus, with description of a new Atlantic species. Trudy Instituta Okeanologii, 101, 106–123. [translation No. 74 from NOAA, Washington, D.C.]
Nielsen, J.G., Cohen, D.M., Markle, D.F. & Robins, C.R. (1999) Ophidiiform fishes of the world (order Ophidiiformes). FAO species catalogue, 18, 1–178.
Nielsen, J.G. & Møller, P.R. (2008) New and rare deep-sea ophidiiform fishes from the Solomon Sea caught by the Danish Galathea 3 Expedition. Steenstrupia, 30 (1), 21–46.
Quattrini, A.M., Nizinski, M.S., Chaytor, J.D., Demopoulos, A.W. J., Roark, E.B., France, S.C., Moore, J.A., Heyl, T., Auster, P.J., Kinlan, B., Ruppel, C., Elliott, K.P., Kennedy, B.R.C., Lobecker, E., Skarke, A. & Shank, T.M. (2015) Exploration of the canyon-incised continental margin of the Northeastern United States reveals dynamic habitats and diverse communities. PLoS ONE, 10 (10), e0139904, 1–32. https://doi.org/10.1371/journal.pone.0139904
Sêret, B. & Andreata, J.V. (1992) Deep-sea fishes collected during cruise MD-55 off Brazil. Cybium, 16 (2), 81–100.
Sumner-Rooney, L. (2018) The kingdom of the blind: disentangling fundamental drivers in evolution of eye loss. Integrative and Comparative Biology, 58, 372–385.
Wilkens, H., Strecker, U. & Yager, J. (1989) Eye reduction and phylogenetic age in ophidiiform cave fishes. Zeitschrift für zoologische Systematik und Evolutionsforschung, 27, 126–134.
Warrant, E.J. & Locket, N.A. (2004) Vision in the deep sea. Biological Review, 79, 671–712.
Zerulla, T.C. & Stoddard, P.K. (2021) The biology of polymorphic melanic side-spotting in poeciliid fishes. Frontiers in Ecology and Evolution, 8 (Article 608289), 1–23.