Abstract
Episemion krystallinoron sp. nov., the second species in this formerly monotypic genus, is described from the Monts de Cristal in northwestern Gabon and adjacent areas in Equatorial Guinea. It is clearly distinguished from its congener by the coloration pattern of adult males. Species status is also supported by mitochondrial DNA data. Episemion Radda & Pürzl, 1987 is regarded as a valid genus, distinct from all other nothobranchiid genera and probably most closely related to Diapteron Huber & Seegers, 1977 and Kathetys Huber, 1977. It is the third described endemic nothobranchiid species from the Monts de Cristal and adjacent areas.References
Amiet, J.L. (1987) Le Genre Aphyosemion Myers (Pisces, Teleostei, Cyprinodontiformes). Faune du Cameroun, Volume 2. Sciences Nat, Compiègne, France, 262 pp.
Bitter, F. (2003) Diapteron, beobachtet in der Natur und im Aquarium. Deutsche Killifisch Gemeinschaft-Journal, 35 (6), 197–203.
Boulenger, G.A. (1903) Description of new Freshwater Fishes from Southern Cameroon. Annals and Magazine of Natural History, ser. 7, 12, 435–441.
Boulenger, G.A. (1911) Descriptions of new African Cyprinodont Fishes. Annals and Magazine of Natural History, ser. 8, 8, 260–268.
Brosset, A. (1982) Le peuplement de Cyprinodontes du Bassin de l'Ivindo, Gabon. Revue d'Ecologie (Terre et Vie), 36, 233–292.
Brosset, A. (2003) Convergent and divergent evolution in rain-forest populations and communities of cyprinodontiform fishes (Aphyosemion and Rivulus) in Africa and South America. Canadian Journal of Zoology, 81, 1484–1493.
Brosset, A. & Lachaise, D. (1995) Evolution as a lottery conflicting with evolution via sexual selection in African rain-forest-dwelling killifishes (Cyprinodontidae, Rivulinae, Diapteron). Evolutionary Biology, 28, 217–264.
CARPE, Central African Regional Program for the Environment. Available from: http://carpe.umd.edu/ (accessed 28 January 2006)
Dadaniak, N., Lütje, R. & Eberl W. (1995) Faszination Killifische: Die "Aphyosemion cameronense"-Gruppe. Published by the authors, Germany, 480 pp.
Gill, T. (1862) On the West African genus Hemichromis and description of new species in the Museum of the Academy and Smithsonian Institution. Proceedings of the Academy of Natural Sciences of Philadelphia, 14, 134–139.
Gioda, A., Maley, J., Guasp, R.E. & Baladon, A.A. (1993) Some low elevation fog forests of dry environments: application to African paleoenvironments. In: Hamilton, L.S., Juvik, J.O. & Scatena, F.N. (Eds.) Tropical Montane Cloud Forests. Proceedings of an International Symposium at San Juan, Puerto Rico, East-West Center, pp. 97–101.
Günther, A. (1866) Catalog of Fishes in the British Museum. Volume 6. British Museum, London, 368 pp.
Gustinicich, S., Manfioletti, G., Del Dal, G., Schneider, C. & Caninci, P. (1991) A fast method for high quality genomic DNA extraction from whole human blood. BioTechniques, 11, 298–302.
Hall, T.A. (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symposium Series, 41, 95–98.
Hijmans, R.J., Guarino, L., Cruz, M. & Rojas, E. (2001) Computer tools for spatial analysis of plant genetic resources data: 1. DIVA-GIS. Plant Genetic Resources Newsletter, 127, 15–19.
Hoedeman, J. (1958) The frontal scalation pattern in some groups of toothcarps (Pisces: Cyprinodontiformes). Bulletin of Aquatic Biology, 1, 23–28.
Huber, J.H. (1977a) Une chaîne de deux Aphyosemion sympatriques dans les Monts de Cristal, Gabon, avec description d'une espèce nouvelle: A. (M.) mimbon n. sp.. Revue française d'Aquariologie, 4, 3–10.
Huber, J.H. (1977b) Liste nominale annotée de Aphyosemion Myers, avec description de Raddaella et Kathetys deux sous-genres nouveaux à la biologie originale. Supplement Killi Revue (Killi Club de France), 4 (4), 1–16.
Huber, J.H. (1992) Review of Rivulus. Ecobiogeography — Relationships. Société Française d'Ichthyologie, Paris, 586 pp.
Huber, J.H. (1998a) Comparison of old world and new world tropical cyprinodonts. Société Française d'Ichthyologie, Paris, 109 pp.
Huber, J.H. (1998b) A new Cyprinodont species with a uniquely-coloured female, Aphyosemion hera n.sp. (Cyprinodontiformes, Pisces), from northwestern Gabon. Revue Suisse de Zoologie, 105, 331–338.
Huber, J.H. (2000) Killi-Data 2000. Société Française d'Ichthyologie, Paris (German edition), 450 pp.
Huber, J.H. & Seegers, L. (1977) Vorläufige Beschreibung von Diapteron, nov. subgen. Deutsche Killifisch Gemeinschaft-Journal, 9 (9), 146–148.
Huelsenbeck, J.P. & Ronquist, F. (2001) MRBAYES: Bayesian inference of phylogeny. Bioinformatics, 17, 754–755.
Irwin, D.M., Kocher, T.D. & Wilson, A.C. (1991) Evolution of the cytochrome b gene of mammals. Journal of Molecular Evolution, 32, 128–144.
Kamdem Toham, A. & Teugels, G.G. (1999) First data on an Index of Biotic Integrity (IBI) based on fish assemblages for the assessment of the impact of deforestation in a tropical West African river system. Hydrobiologia, 397, 29–38.
Kumar, S., Tamura, K. & Nei, M. (2004) MEGA3: Integrated software for Molecular Evolutionary Genetics Analysis and sequence alignment. Briefings in Bioinformatics, 5, 150–163.
Legros, O., Zentz, F. & Agnèse, J.F. (2005) Description de deux nouveaux Chromaphyosemion (Teleostei: Aplocheilidae) du sud de la Plaine littorale camerounaise. Killi-Contact, 33 (3), 3–30.
Lönnberg, E. (1895) Notes on Fishes collected in the Cameroons by Mr. Y. Sjöstedt. Öfversigt af Kongliga Vetenskaps-Akademiens Förhandlingar, 3, 179–195.
Maley, J. (1987) Fragmentation de la foret dense humide Africaine et extension des biotopes montagnards au Quaternaire récent: nouvelles données polliniques et chronologiques. Implications paléoclimatiques et biogéographiques. Palaeoecology of Africa and the surrounding Islands, 18, 307–334.
Maley, J. (1989) Late Quarternary climatic changes in the African rain forest: forest refugia and the major role of sea surface temperature variations. In: Leinen, M. & Sarnthein, M. (Eds), Paleoclimatology and Paleometeorology: Modern and Past Patterns of Global Atmospheric Transport. NATO ASI Series, Series C: Mathematical and Physical Sciences — Volume 282. Kluwer Academic Publishers, Boston, MA, pp. 585–616.
Moritz, C., Schneider, C.J. & Wake, D.B. (1992) Evolutionary relationships within the Ensatina eschscholtzii complex confirm the ring species interpretation. Systematic Biology, 41, 273–291.
Myers, G.S. (1924) A new poeciliid fish from the Congo, with remarks on funduline genera. American Museum Novitates, 116, 1–9.
Myers, G.S. (1933) The Genera of Indo-Malayan and African Cyprinodont Fishes related to Panchax and Nothobranchius. Copeia 1933 (4), 180–185.
Neumann, W. (2000) Die Hechtlinge. Deutsche Killifisch Gemeinschaft-Journal, Supplementheft Nr. 6, 1–114.
Parenti, L. (1981) A phylogenetic and biogeographic analysis of Cyprinodontiform fishes (Teleostei: Atherinomorpha). Bulletin of the American Museum of Natural History, 168 (4), 335–557.
Posada, D. & Buckley, T.R. (2004) Model selection and model averaging in phylogenetics: advantages of akaike information criterion and bayesian approaches over likelihood ratio tests. Systematic Biology, 53, 793–808.
Posada, D. & Crandall, K.A. (1998) Modeltest: testing the model of DNA substitution. Bioinformatics, 14 (9), 817–818.
Rachow, A. (1921) Die Zahnkarpfen oder Kärpflinge. Teil 2. Die eigebärenden Zahnkarpfen (Cyprinodontidae oviparae). Die Gattung Haplochilus. In: Stansch, K. (Ed.) Bibliothek für Aquarien und Terrarienkunde. Volume 16, Braunschweig, pp 26–27.
Radda, A.C. (1971a) Cyprinodontiden-Studien im südlichen Kamerun. 2. Das Tiefland der Küste. Aquaria, 18, 109–121.
Radda, A.C. (1971b) Cyprinodontiden-Studien im südlichen Kamerun. 5. Das Wald- und Grasland Westkameruns mit der vorläufigen Beschreibung von Aphyosemion bamilekorum nov. spec.. Aquaria, 18, 173–182.
Radda, A.C. (1975) Contribution to the knowledge of cyprinodonts of Gabon with the description of four new species and one new subspecies of the genus Aphyosemion Myers. British Killifish Association Publication, Separatum, 20 pp.
Radda, A.C. & Pürzl, E. (1987a) Episemion callipteron, ein neuer Killifisch aus Nordgabun. Deutsche Killifisch Gemeinschaft-Journal, 19 (2), 17–22.
Radda, A.C. & Pürzl, E. (1987b) Colour Atlas of Cyprinodonts of the Rain Forests of Tropical Africa. O. Hofmann-Verlag, Wien, 160pp.
Seegers, L. (1980) Diapteron — eine neue Killifischgattung aus dem Ivindobecken. Aquarien Magazin, 14 (10), 554–561.
Seegers, L. (1997) Killifishes of the world. Old World Killies II. Aqualog, A.C.S. GmbH, Mörfelden-Walldorf, Germany, 250 pp.
Sonnenberg, R. (2000) The distribution of Chromaphyosemion Radda, 1971 (Teleostei: Cyprinodontiformes) on the coastal plains of West and Central Africa. In: Rheinwald, G. (Ed.) Isolated Vertebrate Communities in the Tropics. Proceedings of the 4th International Symposium, Bonn. Bonner zoologische Monographien 46, pp. 79–94.
Sonnenberg, R. & Blum, T. (2005) Aphyosemion (Mesoaphyosemion) etsamense (Cyprinodontiformes: Aplocheiloidei: Nothobranchiidae), a new species from the Monts de Cristal, northwestern Gabon. Bonner zoologische Beiträge, 53, 211–220.
van der Zee, J. (2002) Neue Einsichten in die Verwandtschaft der Gattung Episemion. Deutsche Killifisch Geimeinschaft-Journal, 34 (5), 135–142.
van der Zee, J. & Wildekamp, R.H. (1994) Description of a new Fundulopanchax species (Cyprinodontiformes: Aplocheilidae) from the Niger delta, with a redefinition of the genus Fundulopanchax. Journal of African Zoology, 108 (5), 417–434.
Wildekamp, R.H. (1993) A World of Killies. Atlas of the Oviparous Cyprinodontiform Fishes of the World. Volume 1. The American Killifish Association, Mishawaka, Indiana, 311 pp.
Wildekamp, R.H. (1996) A World of Killies. Atlas of the Oviparous Cyprinodontiform Fishes of the World. Volume 3. The American Killifish Association, Mishawaka, Indiana, 330 pp.
WWF (2003) Biological Priorities for Conservation in the Guinean-Congolian Forest and Freshwater Region. WWF-US/CARPO, Washington, DC, 22 pp.