Marked differentiation in a new species of dwarf stonebasher, Pollimyrus cuandoensis sp. nov. (Mormyridae: Teleostei), from a contact zone with two sibling species of the Okavango and Zambezi rivers Author Kramer, Bernd University of Regensburg, Zoological Institute, D- 93040 Regensburg, Germany; Author Bank, Herman van der Department of Zoology, University of Johannesburg, African Centre for DNA Barcoding, Johannesburg, South Africa; Author Wink, Michael Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, D- 69120 Heidelberg, Germany text Journal of Natural History 2013 J. Nat. Hist. 2013-12-04 48 7 - 8 429 463 http://dx.doi.org/10.1080/00222933.2013.807950 journal article 7021 10.1080/00222933.2013.807950 a1053c94-58d2-4e68-80f8-fc983d11ee88 1464-5262 4631571 FB644B21-04F6-44F8-AEB6-8DC09268C17C Pollimyrus Taverne, 1971 Diagnosis (translated from Taverne 1971 , p. 108) Fairly short to elongate body; snout shorter than the postorbital portion of the skull, with a high upper jaw (“une mâchoire supérieure haute”) that is curved backwards and slightly longer rostrally than lower jaw, mouth terminal, inferior or subinferior; caudal peduncle two to five times longer than deep; 15 to 36 dorsal fin rays; 21 to 31 anal fin rays; 9 to 12 pectoral fin rays; 35 to 70 lateral line scales; 7 to 21 / 8 to 23 scales in a transverse line of the body; 8 to 17 / 6 to 20 scales in a transverse line between the dorsal and the anal fins; 12 to 20 scales around the caudal peduncle; 5 to 9 / 6 to 10 bicuspid teeth; lateral ethmoid present but reduced; mesethmoid rather large and curved backwards; six circumorbital bones; anterior orbital and first infraorbital not fused; four hypural bones; 39 to 45 vertebrae. Type species : Pollimyrus isidori (Valenciennes, 1846) . Included species . Valid unless stated otherwise. adspersus , Mormyrus Günther, 1866 . Current status: valid as Pollimyrus adspersus (Günther, 1866). brevis , Marcusenius Boulenger, 1913 . Current status: valid as Pollimyrus brevis (Boulenger, 1913). castelnaui , Marcusenius Boulenger, 1911 . Current status: valid as Pollimyrus castelnaui ( Boulenger, 1911 ). cuandoensis sp. nov. , Pollimyrus Kramer, van der Bank and Wink, 2013 . guttatus , Petrocephalus Fowler, 1936 . Current status: valid as Pollimyrus guttatus (Fowler, 1936). isidori , Mormyrus Valenciennes, 1847 . Current status: valid as Pollimyrus isidori (Valenciennes, 1847). maculipinnis , Marcusenius Nichols and La Monte, 1934 . Current status: valid as Pollimyrus maculipinnis (Nichols & La Monte, 1934) . marianne , Pollimyrus Kramer, van der Bank, Flint, Sauer-Gürth and Wink, 2003 . nigricans , Marcusenius Boulenger, 1906 . Current status: valid as Pollimyrus nigricans (Boulenger, 1906). nigripinnis , Marcusenius Boulenger, 1899 . Current status: valid as Pollimyrus nigripin- nis (Boulenger, 1899). pedunculatus , Marcusenius David and Poll, 1937 . Current status: valid as Pollimyrus pedunculatus (David and Poll, 1937). petherici , Marcusenius Boulenger,1899 . Current status: valid as Pollimyrus petherici (Boulenger, 1898). petricolus , Marcusenius Daget, 1954 . Current status: valid as Pollimyrus petricolus (Daget, 1954). plagiostoma , Marcusenius Boulenger, 1889 . Current status: valid as Pollimyrus plagiostoma (Boulenger, 1898) . pulverulentus , Marcusenius Boulenger, 1899 . Current status: valid as Pollimyrus pulverulentus (Boulenger, 1899) . schreyeni , Pollimyrus Poll, 1972 . stappersi , Marcusenius Boulenger, 1915 . Current status: valid as Pollimyrus stappersi (Boulenger, 1915) . tumifrons , Marcusenius Boulenger, 1902 . Current status: valid as Pollimyrus tumifrons (Boulenger, 1902) .