02153nas a2200169 4500008004100000022001400041245015600055210006900211260001600280300000800296490000900304520155700313100001801870700002401888700001401912856005701926 2016 eng d a1175-532600aElectric organ discharges of South African Marcusenius species (Teleostei: Mormyridae) and their effectiveness as indicators of local species diversity0 aElectric organ discharges of South African Marcusenius species T cMay-11-2018 a3670 v42003 a

Recent morphological and genetic studies have revealed two new species of snoutfish in South Africa, Marcusenius caudisquamatus and M. krameri, which had been confused with M. pongolensis, the South African bulldog fish. All known mormyriform fish are nocturnal and emit electric organ discharges (EODs) for communication that are characteristic for their species. This paper examines whether or not the EODs of these three closely-related South African species can be differentiated from each other. An EOD pulse of a bulldog fish consists of a head-positive phase P, followed by a head-negative phase N of short duration. We measured and compared six variables of the EOD pulse waveform for South African samples for the three species from different locations using MANOVA, ANOVA and Discriminant Analysis, with M. devosi from Kenya as an outgroup. The EOD waveforms, normalized to the same P-phase amplitude, varied significantly from each other in four variables, most strongly in the amplitude of the N phase and the duration of the P phase. In two species, M. devosi and M. krameri, there was no evidence of difference between sexes, in contrast to M. pongolensis and M. caudisquamatus whose male pulses were of longer duration. M. devosi and M. krameri were statistically significantly independent of each other and of any other group studied. By contrast, the M. pongolensis specimens from different locations showed a high degree of variability amongst each other, including significant separation, and overlap with M. caudisquamatus.

1 aKramer, Bernd1 aMaake, Pholoshi, A.1 aGon, Ofer uhttp://biotaxa.org/Zootaxa/issue/view/zootaxa.4200.302601nas a2200217 4500008004100000245013800041210006900179260001200248300001200260490000900272520191100281653001102192653001702203653000902220653002402229653001502253653002202268653002002290100002402310856004902334 2016 eng d00aPetrocephalus leo, a new species of African electric fish (Osteoglossomorpha: Mormyridae) from the Oubangui River basin (Congo basin)0 aPetrocephalus leo a new species of African electric fish Osteogl c06/2016 a319-3300 v41213 a

A new species of the African weakly electric fish genus Petrocephalus (Osteoglossomorpha: Mormyridae: Petrocephalinae) is described from the Oubangui (Ubangi) River basin, the principal right-bank tributary of the Congo River. Petrocephalus leo sp. nov. is one of the most distinctive species of Petrocephalus as it combines (among other characteristics) the absence of electroreceptive rosettes on the head with a unique melanin pattern. Only four other species of Petrocephalus lack all electroreceptive rosettes: Petrocephalus microphthalmus, Petrocephalus haullevillii, Petrocephalus schoutedeni, and Petrocephalus zakoni. Petrocephalus leo sp. nov. can be distinguished from these four species in having a distinctive black mark at the base of the pectoral fins (versus absent in P. microphthalmus, P. haullevillii and P. schoutedeni) and no subdorsal black mark (versus present in P. zakoni). A phylogenetic analysis using mitochondrial cytochrome b gene sequences shows haplotypes of P. leo sp. nov. are distinct, but are unexpectedly nested within P. zakoni haplotypes, making this latter species paraphyletic. To investigate this conflict between morphology and mitochondrial cytochrome b, a nuclear marker, the first intron of the gene coding for the S7 ribosomal protein, was sequenced. The presence of four diagnostic indels between P. zakoni and P. leo sp. nov. sequences supports the reciprocal monophyly of these two species. This is the first reported case of conflict between morphology and mitochondrial phylogeny within the genus Petrocephalus. Finally, three species of Petrocephalus are reported for the first time from the Oubangui region bringing the total of Petrocephalus species in this region to 12.

10aAfrica10acytochrome b10afish10amolecular phylogeny10amorphology10anuclear S7 intron10aPetrocephalinae1 aLavoué, Sébastien uhttps://mormyrids.myspecies.info/fr/node/50100471nas a2200133 4500008004100000245010600041210006900147300000900216490000800225653001100233100002300244700002200267856004800289 2005 eng d00aA new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa0 anew Stomatorhinus Osteoglossomorpha Mormyridae from the Ivindo R a1-230 v84710aIvindo1 aSullivan, John, P.1 aHopkins, Carl, D. uhttps://mormyrids.myspecies.info/fr/node/4600616nas a2200145 4500008004100000245020900041210006900250260001200319300000900331490000900340100002400349700002300373700002600396856004800422 2010 eng d00aAfrican weakly electric fishes of the genus Petrocephalus (Osteoglossomorpha: Mormyridae) of Odzala National Park, Republic of Congo (Lékoli River, Congo River basin) with description of five new species0 aAfrican weakly electric fishes of the genus Petrocephalus Osteog c09/2010 a1-520 v26001 aLavoué, Sébastien1 aSullivan, John, P.1 aArnegard, Matthew, E. uhttps://mormyrids.myspecies.info/fr/node/2500456nas a2200121 4500008004100000245011900041210006900160260001200229300001200241490000900253100002400262856004800286 2011 eng d00aA new species of Petrocephalus Marcusen 1854 (Osteoglossomorpha: Mormyridae) from the Sanaga River basin, Cameroon0 anew species of Petrocephalus Marcusen 1854 Osteoglossomorpha Mor c06/2011 a20–280 v29341 aLavoué, Sébastien uhttps://mormyrids.myspecies.info/fr/node/1901782nas a2200169 4500008004100000022001400041245012800055210006900183260001200252300000800264490000900272520122800281100002401509700001401533700001801547856004701565 2014 eng d a1175-532600aDescriptions of three new species of Marcusenius Gill, 1862 (Teleostei: Mormyridae) from South Africa and Mozambique0 aDescriptions of three new species of iMarcuseniusi Gill 1862 Tel c03/2014 a4550 v37803 a

Morphological and genetic studies of mormyrid fishes belonging to the genus Marcusenius from South Africa and Mozambique revealed four species of which three are described as new. Marcusenius pongolensis is widespread throughout the Incomati, Pongola and Kosi river systems, and sparsely represented in the Limpopo River system in South Africa. Marcusenius krameri sp. nov. is endemic to the Limpopo River system, and is the sister taxon of M. caudisquamatus sp. nov. from the Nseleni and Mhlatuze river systems in the KwaZulu-Natal Province of South Africa. The Ruvuma specimens were well differentiated from all southern and eastern African species of Marcusenius, and are therefore recognised as M. lucombesi sp. nov. Phylogenetic analysis of the mitochondrial cytochrome b gene showed that the three new species and M. altisambesi form a monophyletic lineage that is sister to a group containing M. pongolensis and M. macrolepidotus. Marcusenius krameri and M. lucombesi seems to prefer slow flowing reaches of rivers, whereas M. pongolensis and M. caudisquamatus seems to mainly inhabit rapid flowing sections of rivers with a rocky substrate. A key to the southern African species of Marcusenius is provided.

1 aMaake, Pholoshi, A.1 aGon, Ofer1 aSwartz, Ernst uhttps://mormyrids.myspecies.info/fr/node/9