Abstract
Lethenteron ninae sp. n., a nonparasitic lamprey, is described from rivers of western Transcaucasia in Russia and Abkhazia. It is distinguished from the other species of Lampetrinae in Europe and west Asia (Black Sea basin) by the combination of the following character states: adults with a dark blotch near the apex of the second dorsal fin; exolaterals absent; posterials either absent or more commonly present in a single incomplete row of 3–7 teeth (a toothless gap in the middle); transverse lingual lamina with 9–15 unicuspid teeth, the median one markedly enlarged; supraoral lamina with two unicuspid teeth separated by a toothless bridge; 1–2 rows of anterials, usually 2; first row of anterials with 5–7 unicuspid teeth; oral fimbriae, 69–99; trunk myomeres in both ammocoetes and adults, 56–62; and in ammocoetes, trunk not mottled and tongue precursor bulb clearly triangular, with a wide base and a pointed apex bearing few cirri.References
Barach, G.P. (1960) Inland water bodies of the Abkhazskaya ASSR, their commercial fauna and importance for fisheries. Abgozizdat, Sukhumi, 132 pp. (In Russian).
Berg, L.S. (1931) A review of the lampreys of the northern hemisphere. Annuaire du Musée Zoologique de l’Académie des Sciences de l’URSS, 32(1), 87–116 + 8 pls.
Berg, L.S. (1948) Freshwater fishes of the USSR and adjacent countries. 4th edition. Vol. 1. Academy of Sciences of USSR Zoological Institute, Leningrad, pp. 1–504. (In Russian).
Bogutskaya, N.G. & Naseka, A.M. (2004) Catalogue of agnathans and fishes of fresh and brackish waters of Russia with comments on nomenclature and taxonomy. KMK Scientific Press Ltd., Moscow. 389 pp. (In Russian).
De Filippi, F. (1865) Note di un viaggio in Persia nel 1862. Milano, viii + 396 pp.
Drogan, V.A. (2002) Fish fauna of Sochi National Park. In: Tuniyev, B.S. (Ed.), Biodiversity and monitoring of the natural ecosystems in Kavkazskiy State Nature Biosphere Reserve. Kavkazskiy State Nature Biosphere Reserve, Novocherkassk, pp. 124–129. (In Russian).
Elanidze, R.F. (1983) Fish fauna of rivers and lakes of Georgia. Metsniereba, Tbilisi, 318 pp. (In Russian).
Gill, H.S., Renaud, C.B., Chapleau, F., Mayden, R.L. & Potter, I.C. (2003) Phylogeny of living parasitic lampreys (Petromyzontiformes) based on morphological data. Copeia, 2003(4), 687–703.
Holčík, J. (1986) Eudontomyzon Regan, 1911. In: Holčík, J. (Ed.), The freshwater fishes of Europe. Vol. 1, Part I: Petromyzontiformes. AULA-Verlag, Wiesbaden, pp. 143–145.
Holčík, J. & Delić, A. (2000) New discovery of the Ukrainian brook lamprey in Croatia. Journal of Fish Biology, 56, 73–86.
Holčík, J. & Šorić, V. (2004) Redescription of Eudontomyzon stankokaramani (Petromyzontes, Petromyzontidae) – a little known lamprey from the Drin River drainage, Adriatic Sea Basin. Folia Zoologica, 53(4), 399–410.
Hubbs, C.L. & Trautman, M.B. (1937) A revision of the lamprey genus Ichthyomyzon. Miscellaneous Publications of the Museum of Zoology, University of Michigan 35, 7–109 + 2 pls.
Khidir, K.T. & Renaud, C.B. (2003) Oral fimbriae and papillae in parasitic lampreys (Petromyzontiformes). Environmental Biology of Fishes, 66(3), 271–278.
Kokotshashwili, G.V. (1942) To the question about the presence of the Ukraine lamprey Lampetra mariae Berg in the rivers of Georgia. Travaux de l’Université Staline à Tbilisi 22, 85–90. (In Russian).
Kottelat, M. (1997) European freshwater fishes. Biologia (Bratislava) 52 (suppl. 5), 1–271.
Kottelat, M., Bogutskaya, N.G. & Freyhof, J. (2005) On the migratory Black Sea lamprey and the nomenclature of the ludoga, Peipsi and ripus whitefishes (Agnatha: Petromyzontidae; Teleostei: Coregonidae. Zoosystematica Rossica, 14(1), 181–186.
Kottelat, M. & Freyhof, J. (2007) Handbook of European freshwater fishes. Kottelat, Cornol, Switzerland and Freyhof, Berlin, Germany, xiii + 646 pp.
McPhail, J.D. & Lindsey, C.C. (1970) Freshwater fishes of northwestern Canada and Alaska. Fisheries Research Board of Canada Bulletin, 173, 1–381.
Naseka, A.M. & Diripasko, O.A. (2008) A recent record of an anadromous lamprey (Agnatha: Petromyzontidae) from the Sea of Azov. Ichthyological Exploration of Freshwaters, 19(3), 283–287.
Nelson, J.S. (2006) Fishes of the world. Fourth edition. John Wiley & Sons, Inc., Hoboken, New Jersey, xix + 601 pp.
Potter, I.C. (1968) Mordacia praecox, n. sp., a nonparasitic lamprey (Petromyzonidae), from New South Wales, Australia. Proceedings of the Linnean Society of New South Wales, 92, 254–261 + 1 pl.
Potter, I.C. & Hilliard, R.W. (1987) A proposal for the functional and phylogenetic significance of differences in the dentition of lampreys (Agnatha: Petromyzontiformes). Journal of Zoology, London, 212, 713–737.
Renaud, C.B. (1982) Revision of the lamprey genus Eudontomyzon Regan, 1911. Unpublished M.Sc. thesis. University of Ottawa, Ottawa, xvi + 146 pp.
Stefanov, T. & Holčík, J. (2007) The lampreys of Bulgaria. Folia Zoologica 56(2), 213–224.
Tuniyev, B.S. (1999) Cyclostomata and fishes. In: Tuniyev, B.S. (Ed.), Flora and fauna of nature reserves. Fauna of the Kavkazskiy Nature Reserve. Komissiya RAN po zapovednomu delu, Moscow, pp. 39–43. (In Russian).
Tuniyev, S.B. (2005) Present state and perspectives of research of the fish fauna of Sochi National Park. In: Tuniyev, B.S. (Ed.), Problems of sustainable development of regions of recreational specialization. Sochinskiy nauchno-issledovatel’skiy tsentr RAN, Sochi, pp. 163–174. (In Russian).
Tuniyev, S.B. (2006) Fish fauna of Sochi National Park. In: Tuniyev, B.S. (Ed.), Inventory of the main taxonomic groups and assemblages, investigations of Sochi National Park – first results of the first in Russia national park. Iss. 2. Minpriroda, Moscow, pp. 187–194. (In Russian).
Tuniyev, S.B. (2008) Exothermic vertebrates of Sochi National Park: taxonomy, zoogeography and conservation. Abstracts of the Candidate of Sciences Thesis. Zoological Institute, St. Petersburg, 24 pp. (In Russian).
Vladykov, V.D. (1950) Larvae of eastern American lampreys (Petromyzonidae). I. Species with two dorsal fins. Le Naturaliste Canadien, 77(3–4), 73–95.
Vladykov, V.D. (1955) Lampetra zanandreai, a new species of lamprey from northern Italy. Copeia, 1955(3), 215–223.
Vladykov, V.D. & Follett, W.I. (1967) The teeth of lampreys (Petromyzonidae): their terminology and use in a key to Holarctic genera. Journal of the Fisheries Research Board of Canada, 24(5), 1067–1075.