@article {662, title = {Morphometric synthesis of Pollimyrus (Teleostei, Mormyridae) with the description of four new species}, journal = {Journal of Fish Biology}, volume = {2024}, year = {2024}, month = {Nov-24-2024}, pages = {1-47}, abstract = {

Mormyridae, a species-rich family endemic to Africa, remains taxonomically understudied. This has been the case for the genus Pollimyrus Taverne, 1971, which hinders further understanding of the distribution, ecology, and conservation of its species. Therefore, an in-depth morphometric comparison of all currently valid species is carried out using most of the available type specimens. Species delineations were re-evaluated, and four species new to science described: Pollimyrus ibalazambai sp. nov. (the Luki River, the Democratic Republic of the Congo), Pollimyrus krameri sp. nov. (the Lugenda River, Mozambique), Pollimyrus vanneeri sp. nov. (the Kouilou-Niari River, the Republic of the Congo), and Pollimyrus weyli sp. nov. (the Buzi River, Mozambique). In this study, Pollimyrus guttatus is confirmed to belong to Pollimyrus, whereas Pollimyrus eburneensis and Cyphomyrus plagiostoma seem more similar to species allocated to other genera. No or only little morphological differences were found between the type series of several species, which could indicate the need for synonymization of these species (Pollimyrus cuandoensis with Pollimyrus marianne and Pollimyrus nigripinnis with Pollimyrus pulverulentus). As such 20 species are currently morphologically identifiable in the genus Pollimyrus. The present study highlights the critical need for further synthetic efforts and new collecting efforts across Africa for this and other Mormyridae genera.

}, keywords = {morphology, Pollimyrus ibalazambai sp. nov., Pollimyrus krameri sp. nov., Pollimyrus vanneeri sp. nov., Pollimyrus weyli sp. nov., Taxonomy}, issn = {0022-1112, 1095-8649}, doi = {10.1111/jfb.15983}, url = {http://dx.doi.org/10.1111/jfb.15983}, author = {Dierickx, Katrien and Wamuini Lunkayilakio, Soleil and Bills, Roger and Vreven, Emmanuel} } @article {262, title = {Zoological results of the George Vanderbilt African Expedition of 1934. Part III,{\textendash}The fresh water fishes}, journal = {Proceedings of the Academy of Natural Sciences of Philadelphia}, volume = {88}, year = {1936}, month = {07/1936}, pages = {243{\textendash}335}, abstract = {

The Academy is fortunate in securing the very interesting collection obtained by this expedition. Considering the wide range of localities or stations across transcontinental Africa, of which 39 are listed in part 1 of the present series of papers,\’ only 7 yielded fishes. These are: (13) Athi River Crossing, (17) Kitala, (23) Saidi\’s Village, (24) Vube, (26) Eki- bondo\’s Village, (27) Fort Sibut and (33) Nola. Other smaller lots of materials were later received from 30 kilometers east of Kribi, Cameroons, and Batangafo, Chad Basin. The specimens number nearly 3000, representing 115 species, of which 10 are described as new genera or subgenera and 36 as new species or sub- species. This is surely a remarkable showing, especially in view of the comparatively short amount of time available and the mobility of the expedition. To Mr. George Vanderbilt is due special acknowledgment for his per- sonal interest in the collecting of the specimens, and amassing comprehen- sive series for the museum of the Academy.

}, author = {Fowler, H.W.} } @article {409, title = {Petrocephalus of Odzala offer insights into evolutionary patterns of signal diversification in the Mormyridae, a family of weakly electrogenic fishes from Africa}, journal = {Journal of Physiology-Paris}, volume = {102}, number = {4-6}, year = {2008}, note = {411CHTimes Cited:3Cited References Count:84}, month = {Jul-Nov}, pages = {322-339}, abstract = {

Electric signals of mormyrid fishes have recently been described from several regions of Africa. Members of the Mormyridae produce weak electric organ discharges (EODs) as part of a specialized electrosensory Communication and orientation system. Sympatric species often express distinctive EODs, which may contribute to species recognition during mate choice in some lineages. Striking examples of interspecific EOD variation within assemblages have been reported for two monophyletic radiations: the Paramormyrops of Gabon and the Campylomormyrus of Lower Congo. Here, we describe a speciose assemblage of Petrocephalus in the Lekoli River system of Odzala National Park, Republic of Congo. This widespread genus comprises the Subfamily (Petrocephalinae) that is the Sister group to all other mormyrids (Mormyrinae). Eleven Petrocephalus species were collected in Odzala, five of which are not described taxonomically. We quantify EOD variation within this assemblage and show that all eleven species produce EOD waveforms of brief duration (species means range from 144 to 663 mu s) compared to many other mormyrids. We also present reconstructed phylogenetic relationships among species based on cytochrome b sequences. Discovery of the Odzala assemblage greatly increases the number of Petrocephalus species for which EODs and DNA sequence data are available, permitting a first qualitative comparison between mormyrid Subfamilies of the divergence patterns that have been described within lineages. We find that the Petrocephalus assemblage in Odzala is not a monophyletic radiation. Genetic divergence among Petrocephalus species often appears higher than among Paramormyrops or Campylomormyrus species. In contrast, results of this study and others Suggest that Petrocephalus may generally exhibit less interspecific EOD divergence, as well as smaller sex differences in EOD waveforms, compared to Paramormyrops and Campylomormyrus. We discuss possible causes and consequences of EOD diversification patterns observed within mormyrid subfamilies as a framework for future comparative studies of signal evolution using this emerging model system. (c) 2008 Elsevier Ltd. All rights reserved.

}, keywords = {adaptive radiation, communication signals, electric organ anatomy, electric organ discharge, electrosensory modality, food-habits, gnathonemus-petersii mormyridae, molecular evolution, petrocephalus, pollimyrus-isidori, riverine species flock, sexual signal evolution, sexual-dimorphism, species marker, type npp electrocytes, wave-forms}, isbn = {0928-4257}, doi = {10.1016/j.jphysparis.2008.10.003}, url = { https://doi.org/10.1016/j.jphysparis.2008.10.003}, author = {S{\'e}bastien Lavou{\'e} and Matthew E Arnegard and John P Sullivan and Carl D Hopkins} }