03856nas a2200277 4500008004100000022001400041245013400055210006900189260001600258300001400274490000800288520299800296653003003294653000803324653002903332653000803361653002503369653001503394653001403409653001103423653002503434100002203459700002403481700002103505856005203526 2016 eng d a1313-298900aCryptomyrus: a new genus of Mormyridae (Teleostei, Osteoglossomorpha) with two new species from Gabon, West-Central Africa0 aiCryptomyrusi a new genus of Mormyridae Teleostei Osteoglossomor cAug-02-2016 a117 - 1500 v5613 a

Abstract
We use mitochondrial and nuclear sequence data to show that three weakly electric mormyrid fish specimens collected at three widely separated localities in Gabon, Africa over a 13-year period represent an unrecognized lineage within the subfamily Mormyrinae and determine its phylogenetic position with respect to other taxa. We describe these three specimens as a new genus containing two new species. Cryptomyrus, new genus, is readily distinguished from all other mormyrid genera by a combination of features of squamation, morphometrics, and dental attributes. Cryptomyrus ogoouensis, new species, is differentiated from its single congener, Cryptomyrus ona, new species, by the possession of an anal-fin origin located well in advance of the dorsal fin, a narrow caudal peduncle and caudal-fin lobes nearly as long as the peduncle. In C. ona, the anal-fin origin is located only slightly in advance of the dorsal fin, the caudal peduncle is deep and the caudal-fin lobes considerably shorter than the peduncle. Continued discovery of new taxa within the “Lower Guinea Clade” of Mormyridae highlights the incompleteness of our knowledge of fish diversity in West-Central Africa. We present a revised key to the mormyrid genera of Lower Guinea.

Résumé
Nous avons démontré avec des marqueurs mitochondriaux et nucléaires que trois spécimens de poissons mormyridés faiblement électriques, collectés à trois localités au Gabon sur une période de 13 ans, forment une lignée inconnue au sein de la sous famille des Mormyrinae dont nous avons déterminé la position phylogénétique. Nous décrivons un nouveau genre et deux nouvelles espèces pour ces trois spécimens. Cryptomyrus, nouveau genre, se distingue des autres genres de mormyridés par une combinaison de caractères de l’écaillure, morphométriques, et dentaires. Cryptomyrus ogoouensis, nouvelle espèce, se distingue de sa seule espèce congénérique par sa nageoire anale qui commence nettement en avant de sa nageoire dorsale, son pédoncule caudal gracile et les lobes de sa nageoire caudale pratiquement aussi longs que son pédoncule caudal. Chez Cryptomyrus ona, nouvelle espèce, la nageoire anale commence légèrement en avant de l’origine de la nageoire dorsale, le pédoncule caudal est large, et les lobes de la nageoire caudale sont plus courts que le pédoncule caudal. La découverte ininterrompue de nouveaux taxa dans le «clade de basse Guinée» des Mormyridae illustre notre connaissance incomplète de la diversité des poissons de l’ouest de l’Afrique centrale. Nous présentons une clé révisée des genres de Mormyridae de basse Guinée.

10aAfrican freshwater fishes10aDNA10aelectric organ discharge10aEOD10aintegrative taxonomy10aMormyrinae10aphylogeny10ararity10aweakly electric fish1 aSullivan, John, P1 aLavoué, Sébastien1 aHopkins, Carl, D uhttp://zookeys.pensoft.net/articles.php?id=713702247nas a2200373 4500008004100000020001400041245011300055210006900168260000800237300001000245490000700255520117200262653002701434653001901461653001801480653001701498653002201515653003601537653002201573653001301595653002301608653001601631653002001647653001501667653001601682653002301698653002501721653001601746100001501762700001801777700002301795700002101818856003401839 2009 eng d a0022-111200aThe electric organ discharges of the Petrocephalus species (Teleostei: Mormyridae) of the Upper Volta System0 aelectric organ discharges of the Petrocephalus species Teleostei cJan a54-760 v743 a

In this study, a first comparative investigation of all four species of Petrocephalus (P. bovei, P. bane, P. soudanensis and P. cf. pallidomaculatus) present in the Upper Volta system and their electric organ discharges (EOD) was conducted. It was found that P. bovei was the most widespread (in terms of habitat use), but in several places P. bovei, P. soudanensis and P. cf. pallidomaculatus occurred syntopically. All species emitted a triphasic signal, and with very few exceptions, the Petrocephalus species of the Upper Volta system could clearly be identified on the basis of their EOD waveforms. The most obvious differences between species in EOD waveforms were in amplitude of the last phase, total duration and fast Fourier transformation (FFT) peak frequency. No sexual dimorphism was present in the EOD of any species although external dimorphism, i.e. an indentation at the base of the anal fin of mature males, was common. The EOD waveform diversity in the Upper Volta principally resembled that found in four sympatric Petrocephalus species from the OgoouE system (Gabon) and might play a role in species recognition and speciation processes.

10aactive electrolocation10acentral-africa10acommunication10aeod waveform10afishes mormyridae10agnathonemus-petersii mormyridae10aosteoglossomorpha10apendjari10apollimyrus-isidori10arecognition10asex-differences10aspeciation10avariability10awater conductivity10aweakly electric fish10awest africa1 aMoritz, T.1 aEngelmann, J.1 aLinsenmair, K., E.1 avon der Emde, G. u://000262516900004