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Published: 2022-04-19

Lacustricola margaritatus, a new species of lampeye from the Lake Victoria and Lake Kyoga basins in eastern Africa (Cyprinodontiformes: Procatopodidae)

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Pisces Kenya 'Lacustricola' centralis Lacustricola pumilus Lake Victoria ecoregion Tanzania taxonomy Uganda


Lacustricola margaritatus, a new species inhabiting small streams and swamps in the Lake Victoria basin in north-western Tanzania and southern Uganda, and the Lake Kyoga basin in central Uganda, is described. Lacustricola margaritatus is a small species with a moderately deep body, moderate dimorphism and pronounced dichromatism. It is distinguished from all other Procatopodidae by the following unique combination of characters: live male body colour pattern with vertically-elongated iridescent light blue patches at scale centres, forming a striped appearance of dotted longitudinal lines on the flanks, particularly evident in the two or three series below the mid-longitudinal line; male having deeply coloured unpaired fins with orange-brown in the proximal and median parts and a narrow black distal band; male with a yellow base along the pectoral fin; female with dark grey scale margins and dark grey patches on scales along mid-longitudinal series creating a narrow dark grey stripe; both sexes showing inconspicuous postopercular blotch; and in both sexes, the cephalic sensory system is entirely situated in open grooves at all levels. The new species has previously often been misidentified as L. pumilus, originally described as inhabiting the Lake Tanganyika basin in north-eastern Zambia, or 'L.' centralis, from the Lake Rukwa basin in south-western Tanzania. Lacustricola margaritatus differs from the above two species by morphometric and meristic characters, body and fin colouration, and in arrangement of the cephalic sensory system.


  1. Abell, R., Thieme, M.L., Revenga, C., Bryer, M., Kottelat, M., Bogutskaya, N., Coad, B., Mandrak, N., Contreras-Balderas, S., Bussing, W., Stiassny, M.L.J., Skelton, P., Allen, G.R., Unmack, P., Naseka, A., Ng, R., Sindorf, N., Robertson, J., Armijo, E., Higgins, J.V., Heibel, T.J., Wikramanayake, E., Olson, D., Loìpez, H.L., Reis, R.E., Lundberg, J.G., Sabaj Peìrez, M.H. & Petry, P. (2008) Freshwater ecoregions of the world: a new map of biogeographic units for freshwater biodiversity conservation. BioScience, 58 (5), 403–414.
    Ahl. E. (1924) Neue afrikanische Zahnkarpfen aus dem zoologischen Museum Berlin. Zoologischer Anzeiger, 61 (3–4), 137–138.
    Baur, H. & Leuenberger, C. (2011) Analysis of ratios in multivariate morphometry. Systematic Biology, 60 (6), 813–825.
    Boulenger, G.A. (1906) Fourth contribution to the ichthyology of Lake Tanganyika. Report on the collection of fishes made by Dr. W. A. Cunnington during the Third Tanganyika Expedition, 1904-1905. Transactions of the Zoological Society of London, 17, 537–601.
    Bragança, P.H.N. & Costa, W.J.E.M. (2019) Multigene fossil-calibrated analysis of the African lampeyes (Cyprinodontoidei: Procatopodidae) reveals an early Oligocene origin and Neogene diversification driven by palaeogeographic and palaeoclimatic events. Organisms, Diversity and Evolution, 19, 1–18.
    Bragança, P.H.N., van Zeeventer, R.M., Bills, R., Tweddle, D. & Chakona, A. (2020) Diversity of the southern Africa Lacustricola Myers, 1924 and redescription of Lacustricola johnstoni (Günther, 1894) and Lacustricola myaposae (Boulenger, 1908) (Cyprinodontiformes, Procatopodidae). ZooKeys, 923, 91–113.
    Burgis, M.J. & Symoens, J.J. (1987) African wetlands and shallow water bodies: directory. ORSTOM Editions, Paris, 650 pp.
    Clausen, H.S. (1967) Tropical old world cyprinodonts, reflections on the taxonomy of tropical old world cyprinodonts, with remarks on their biology and distribution. Akademisk Forlag, Copenhagen, 64 pp.
    Copley, H. (1958) Common freshwater fishes of East Africa. Witherby, London, 172 pp.
    Darwall, W., Smith, K., Lowe, T. & Vié, J.-C. (2005) The status and distribution of freshwater biodiversity in eastern Africa. IUCN SSC Freshwater Biodiversity Assessment Programme. IUCN, Gland and Cambridge, viii + 36 pp.
    De Vos, L., Snoeks, J. & Thys van den Audenaerde, D.F.E. (2001) An annotated checklist of the fishes of Rwanda (east central Africa), with historical data on introductions of commercially important species. Journal of East African Natural History, 90, 41–68.[41:AACOTF]2.0.CO;2
    Dytham, C. (2011) Choosing and using statistics: a biologist's guide. Third Edition. Wiley-Blackwell, Oxford, Chichester and Hoboken, 320 pp.
    Fowler, H.W. (1936) Zoological results of the George Vanderbilt African Expedition of 1934. Part III, The fresh water fishes. Proceedings of the Academy of Natural Sciences of Philadelphia, 88, 243–335.
    Frank, V., Micha, J.C., Gillet, A. & Plisnier, P.D. (1984) Etude de la biologie des especes de poissons exploites dans le lac Ihema (Bassin de l'Akagera) au Rwanda. Facultes Universitaires Notre-Dame de la Paix, Namur, 134 pp.
    Ghedotti, M.J. (2000) Phylogenetic analysis and taxonomy of the poecilioid fishes (Teleostei: Cyprinodontiformes). Zoological Journal of the Linnean Society, 130 (1), 1–53.
    Greenwood, P.H. (1958) The fishes of Uganda. The Uganda Society, Kampala, 224 pp.
    Huber, J.H. (1981) A review of the cyprinodont fauna of the coastal plains in Rio Muni, Gabun, Congo, Cabinda and Zaïre, with taxonomic shifts in Aphyosemion, Epiplatys and west African procatopodins. British Killifish Association Publication. British Killifish Association, London, 46 pp.
    Huber, J.H. (1999) Updates to the phylogeny and systematics of the African lampeye schooling cyprinodonts (Aplocheilichthyinae: Cyprinodontiformes). Cybium, 23, 53–77.
    Huber, J.H. (2000) Killi-Data 2000. Updated checklist of taxonomic names, collecting localities and bibliographic references of oviparous Cyprinodont fishes (Atherinomorpha, Pisces). Société Française d'Ichtyologie, Paris, 538 pp.
    Hughes, R.H. & Hughes, J. S. (1992) A directory of African wetlands. IUCN, Gland & Cambridge and UNEP, Nairobi, 820 pp.
    IUCN (2012) IUCN Red List Categories and Criteria. Version 3.1. 2nd Edition. IUCN, Gland and Cambridge, 32 pp.
    James, F.C. & McCulloch, C.E. (1990) Multivariate analysis in ecology and systematics: panacea or Pandora’s box? Annual Review of Ecology and Systematics, 21, 129–166.
    Kiss, R. (1977) Les poissons et la peche dans le lac Ihema (Rwanda, bassin moyen de l'Akagera). Annales Hydrobiologiques, 8 (2), 263–318.
    Lampke, K. (1975) Warum nicht einmal Leuchtaugenfische? Deutsche Killifisch Gemeinschaft Journal, 7 (9), 95–99.
    Lazara, K.J. (2001) The killifishes, an annotated checklist, synonymy, and bibliography of recent oviparous Cyprinodontiform fishes. The killifish master index. 4th Edition. American Killifish Association, Cincinnati, Ohio, 624 pp.
    Mayden, R.L. (1999) Consilience and a hierarchy of species concepts: advances toward closure on the species puzzle. Journal of Nematology, 31 (2), 95–116.
    Mayden, R.L. (2002) On biological species, species concepts and individuation in the natural world. Fish and Fisheries, 3 (3), 171–196.
    Meinken, H. (1971) Neue Zahnkarpfen aus dem Victoria-See (Pisces: Teleostei: Cyprinodontidae). Senckenbergiana Biologica, 52 (6), 429–436.
    McDonald, J.H. (2008) Handbook of biological statistics. Sparky House, Baltimore, 287 pp.
    Minitab. (2010) [Statistical computer software]. Version 16.2.1. Minitab, Inc., State College, Pennsylvania. [program]
    Myers, G.S. (1924) New genera of African poeciliid fishes. Copeia, 129, 42–43.
    Nagy, B. (2014) Nothobranchius milvertzi, a new species of killifish from the Lushiba Marsh in the Lake Mweru drainage, Zambia (Teleostei: Cyprinodontiformes: Nothobranchiidae). Ichthyological Exploration of Freshwaters, 24 (4), 347–360.
    Nagy, B. (2015) Life history and reproduction of Nothobranchius fishes. Journal of the American Killifish Association, 47 (4–6), 182–192.
    Nagy, B. (2018) Nothobranchius ditte, a new species of annual killifish from the Lake Mweru basin in Democratic Republic of Congo (Teleostei: Nothobranchiidae). Ichthyological Exploration of Freshwaters, 28 (2), 115–134.
    Nagy, B. (2020a) An Expedition Around Lake Victoria. Tropical Fish Hobbyist, #744, Sep/Oct 2020, 69 (1), 44–50.
    Nagy, B. (2020b) A la recherche de killis autour du Lac Victoria. L'Aquarium à la maison, 138, 70–74.
    Nagy, B., Watters, B.R., van der Merwe, P.D.W., Cotterill, F.P.D. & Bellstedt, D.U. (2020) Review of the Nothobranchius ugandensis species group from the inland plateau of eastern Africa with descriptions of six new species (Teleostei: Nothobranchiidae). Ichthyological Exploration of Freshwaters, 30 (1), 21–73.
    Parenti, M. (1981) A phylogenetic and biogeographic analysis of cyprinodontiform fishes (Teleostei: Atherinomorpha). Bulletin of the American Museum of Natural History, 168, 335–557.
    Pfeffer, G.J. (1896) Die Fische Ost-Afrikas. In: Möbius, K. (Ed.), Deutsch-Ost-Afrika. Teil 3. Die Thierwelt Ost-Afrikas. Reimer, Berlin, pp. 1–72.
    Quinn, G.P. & Keough, M.J. (2002) Experimental design and data analysis for biologists. University Press, Cambridge, 553 pp.
    Rice, W.R. (1989) Analyzing tables of statistical tests. Evolution, 43 (1), 223–225.
    Sayer, C.A., Máiz-Tomé, L. & Darwall, W.R.T. (2018) Freshwater biodiversity in the Lake Victoria Basin: Guidance for species conservation, site protection, climate resilience and sustainable livelihoods. IUCN, Cambridge and Gland, xiv + 226 pp.
    Seegers, L. (1980) Killifische. Eierlegende Zahnkarpfen im Aquarium. Ulmer, Stuttgart, 174 pp.
    Seegers, L. (1989) Auf Fischfang in Uganda (1). Tatsachen und Informationen aus der Aquaristik (TI), 96, 5–9.
    Seegers, L. (1996) The fishes of Lake Rukwa drainage. Annales, Musée Royal de l'Afrique Centrale, Tervuren, Sciences Zoologiques, 278, 1–407.
    Seegers, L. (1997) Killifishes of the world. Old world killis II. Aqualog, A.C.S., Mörfelden-Walldorf, 112 pp.
    Seegers, L., De Vos, L. & Okeyo, D.O. (2003) Annotated checklist of the freshwater fishes of Kenya (excluding the lacustrine haplochromines from Lake Victoria). Journal of East African Natural History, 92, 11–47.[11:ACOTFF]2.0.CO;2
    Sokal, R.R. & Rohlf, F.J. (1995). Biometry: the principles and practice of statistics in biological research. Third edition. Freeman, New York, New York, 880 pp.
    Sokal, R.R. & Rohlf, F.J. (2009) Introduction to biostatistics. Second edition. Dover Publications, Mineola, 382 pp.
    Thieme, M.L., Abell, R., Stiassny, M.L.J., Skelton, P.H., Lehner, B., Teugels, G.G., Dinerstein, E., Kamdem-Toham, A., Burgess, N.D. & Olson, D. (2005) Freshwater ecoregions of Africa and Madagascar: a conservation assessment. Island Press, Washington, Covelo & London, 483 pp.
    Watters, B.R. (2015) Notes on some interesting lampeyes. Journal of the American Killifish Association, 48, 61–64.
    Watters, B.R. (2017) Notes on some interesting lampeyes—part 2. Journal of the American Killifish Association, 50 (4), 118–125.
    Watters, B.R. & Nagy, B. (2017) Species profile Lacustricola bukobanus (Ahl, 1924). Journal of the American Killifish Association, 50 (1), 24–29.
    Watters, B.R., Nagy, B., van der Merwe, P.D.W., Cotterill, F.P.D. & Bellstedt, D.U. (2019) Review of the Nothobranchius taeniopygus species group from central and western Tanzania with descriptions of five new species and redescription of Nothobranchius taeniopygus (Teleostei: Nothobranchiidae). Ichthyological Exploration of Freshwaters, 29 (3), 239–278.
    Wildekamp, R.H. (1979) Bericht uit Tanzania. Killi Fish Nederland, Killi Nieuws, 9 (3), 83–87.
    Wildekamp, R.H. (1995) A World of Killies: Atlas of the oviparous cyprinodontiform fishes of the world. Vol. II. American Killifish Association, Mishawaka, 384 pp.
    Wildekamp, R.H., Romand, R. & Scheel, J.J. (1986) Cyprinodontidae. In: Daget, J., Gosse, J.-P. & Thys van den Audenaerde, D.F.E. (Eds.), Check-list of the freshwater fishes of Africa (CLOFFA). Vol. 2. ISNB, Brussels, MRAC, Tervuren and ORSTOM, Paris, pp. 165–276.
    Wiley, E.O. (1978) The evolutionary species concept reconsidered. Systematic Zoology, 27 (1), 17–26.
    Zar, J.H. (2010) Biostatistical analysis. 5th Edition. Pearson/Prentice-Hall, Upper Saddle River, New Jersey, xii + 944 pp.
    Zuur, A.F., Ieno, E.N. & Smith, G.M. (2007) Analysing ecological data (statistics for biology and health). Springer, New York, New York, xxvi + 672 pp.