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Journal articles on the topic 'Mormyrinae'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Sullivan, J. P., S. Lavoue, and C. D. Hopkins. "Molecular systematics of the african electric fishes (Mormyroidea: teleostei) and a model for the evolution of their electric organs." Journal of Experimental Biology 203, no. 4 (2000): 665–83. http://dx.doi.org/10.1242/jeb.203.4.665.

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We present a new molecular phylogeny for 41 species of African mormyroid electric fishes derived from the 12S, 16S and cytochrome b genes and the nuclear RAG2 gene. From this, we reconstruct the evolution of the complex electric organs of these fishes. Phylogenetic results are generally concordant with earlier preliminary molecular studies of a smaller group of species and with the osteology-based classification of Taverne, which divides the group into the Gymnarchidae and the Mormyridae, with the latter including the subfamilies Petrocephalinae (Petrocephalus) and Mormyrinae (all remaining ta

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2

Sullivan, John, Sebastien Lavoue, and Carl D. Hopkins. "Cryptomyrus: a new genus of Mormyridae (Teleostei, Osteoglossomorpha) with two new species from Gabon, West-Central Africa." ZooKeys 561 (February 8, 2016): 117–50. https://doi.org/10.3897/zookeys.561.7137.

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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

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3

LAVOUÉ, SÉBASTIEN, JOHN P. SULLIVAN, and MATTHEW E. ARNEGARD. "African weakly electric fishes of the genus Petrocephalus (Osteoglossomorpha: Mormyridae) of Odzala National Park, Republic of the Congo (Lékoli River, Congo River basin) with description of five new species." Zootaxa 2600, no. 1 (2010): 1. http://dx.doi.org/10.11646/zootaxa.2600.1.1.

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Here we examine new collections of Petrocephalus species (Osteoglossomorpha: Mormyridae: Petrocephalinae) made within Odzala National Park in the Republic of the Congo (Lékoli River drainage, northwestern Congo River basin). We compare these collections to type material of all nominal Petrocephalus species described from the Congo basin and the adjacent Lower Guinea ichthyofaunal province. Based on morphology and electric signal characteristics we recognize eleven distinct species of Petrocephalus in these collections, including five new species described herein: Petrocephalus binotatus, Petro

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4

Animem, W. T., P.A Annune, and P. M. Akombo. "Determination of Physical and Nutritional Losses Caused By Pests on Selected Smoked Fish Families in Benue State, Nigeria." International Journal of Research and Review 7, no. 6 (2020): 185–91. https://doi.org/10.5281/zenodo.3952274.

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The study determined the physical and nutritional losses caused by pests on selected smoked fish families in 3 agricultural zones of Benue state. The selected fish families were Clariidae, Protopteridae, Characidae and Mormyridae and were weighed before and after 3 months storage at the end of each quarter of the year for 2 years and were subjected to proximate analysis. In zone A, Claridae, Protopteridae, Characidae and mormyridae had weight loss of 39.00%, 32.00%, 22.00% and 15.00% respectively. In zone B Clariidae, Protopteridae, Characidae and mormyridae had 43.00, 35.50, 23.50 and 18.00%

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5

Lavoué, Sébastien. "A new species of Petrocephalus Marcusen 1854 (Osteoglossomorpha: Mormyridae) from the Sanaga River basin, Cameroon." Zootaxa 2934 (December 31, 2011): 20–28. https://doi.org/10.5281/zenodo.204668.

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6

Sullivan, John P., and Carl D. Hopkins. "A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa." Zootaxa 847 (December 31, 2004): 1–23. https://doi.org/10.5281/zenodo.157189.

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7

Lavoué, Sébastien. "Petrocephalus leo, a new species of African electric fish (Osteoglossomorpha: Mormyridae) from the Oubangui River basin (Congo basin)." Zootaxa 4121, no. 3 (2016): 319–30. https://doi.org/10.11646/zootaxa.4121.3.6.

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Lavoué, Sébastien (2016): Petrocephalus leo, a new species of African electric fish (Osteoglossomorpha: Mormyridae) from the Oubangui River basin (Congo basin). Zootaxa 4121 (3): 319-330, DOI: 10.11646/zootaxa.4121.3.6

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8

Maake, Pholoshi A., Ofer Gon, and Ernst R. Swartz. "Descriptions of three new species of Marcusenius Gill, 1862 (Teleostei: Mormyridae) from South Africa and Mozambique." Zootaxa 3780, no. 3 (2014): 455–80. https://doi.org/10.11646/zootaxa.3780.3.2.

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Maake, Pholoshi A., Gon, Ofer, Swartz, Ernst R. (2014): Descriptions of three new species of Marcusenius Gill, 1862 (Teleostei: Mormyridae) from South Africa and Mozambique. Zootaxa 3780 (3): 455-480, DOI: 10.11646/zootaxa.3780.3.2

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9

Lavoué, Sébastien, Carl D. Hopkins, and André Kamdem Toham. "The Petrocephalus (Pisces, Osteoglossomorpha, Mormyridae) of Gabon, Central Africa, with the description of a new species." Zoosystema 26, no. 3 (2004): 511–35. https://doi.org/10.5281/zenodo.4525990.

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Lavoué, Sébastien, Hopkins, Carl D., Toham, André Kamdem (2004): The Petrocephalus (Pisces, Osteoglossomorpha, Mormyridae) of Gabon, Central Africa, with the description of a new species. Zoosystema 26 (3): 511-535, DOI: 10.5281/zenodo.4525990

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10

Kramer, L. Bernd, Pholoshi A. Maake, and Ofer Gon. "Electric organ discharges of South African Marcusenius species (Teleostei: Mormyridae) and their effectiveness as indicators of local species diversity." Zootaxa 4200, no. 3 (2016): 367–80. https://doi.org/10.11646/zootaxa.4200.3.2.

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Kramer, L. Bernd, Maake, Pholoshi A., Gon, Ofer (2016): Electric organ discharges of South African Marcusenius species (Teleostei: Mormyridae) and their effectiveness as indicators of local species diversity. Zootaxa 4200 (3): 367-380, DOI: 10.11646/zootaxa.4200.3.2

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11

Fricke, Ronald, and L. Bernd Kramer. "Marcusenius elegans: a replacement name for Marcusenius gracilis Kramer 2013 (Osteoglossiformes: Mormyridae), a secondary junior homonym of Marcusenius senegalensis gracilis (Pellegrin 1922)." Zootaxa 5175, no. 4 (2022): 499–500. https://doi.org/10.11646/zootaxa.5175.4.8.

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Fricke, Ronald, Kramer, L. Bernd (2022): Marcusenius elegans: a replacement name for Marcusenius gracilis Kramer 2013 (Osteoglossiformes: Mormyridae), a secondary junior homonym of Marcusenius senegalensis gracilis (Pellegrin 1922). Zootaxa 5175 (4): 499-500, DOI: 10.11646/zootaxa.5175.4.8

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12

Prié, Vincent, Benjamin Adam, and Frédéric Melki. "From fin rays to DNA: supplementary morphological and molecular data to identify Mormyrus subundulatus Roberts, 1989 (Pisces: Mormyridae) from the Bandama River in Côte d'Ivoire." Zoosystema 43, no. 27 (2021): 649–58. https://doi.org/10.5252/zoosystema2021v43a27.

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Prié, Vincent, Adam, Benjamin, Melki, Frédéric (2021): From fin rays to DNA: supplementary morphological and molecular data to identify Mormyrus subundulatus Roberts, 1989 (Pisces: Mormyridae) from the Bandama River in Côte d'Ivoire. Zoosystema 43 (27): 649-658, DOI: 10.5252/zoosystema2021v43a27

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Meunier, François J., Damien Germain, and Olga Otero. "A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha)." Cybium 42, no. 1 (2018): 87–90. https://doi.org/10.26028/cybium/2018-421-008.

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Meunier, François J., Germain, Damien, Otero, Olga (2018): A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha). Cybium 42 (1): 87-90, DOI: 10.26028/cybium/2018-421-008, URL: http://dx.doi.org/10.26028/cybium/2018-421-008

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Meunier, François J., Damien Germain, and Olga Otero. "A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha)." Cybium 42, no. 1 (2018): 87–90. https://doi.org/10.26028/cybium/2018-421-008.

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Meunier, François J., Germain, Damien, Otero, Olga (2018): A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha). Cybium 42 (1): 87-90, DOI: 10.26028/cybium/2018-421-008, URL: http://dx.doi.org/10.26028/cybium/2018-421-008

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15

Ozouf-Costaz, Catherine, Jean-Pierre Coutanceau, Céline Bonillo, et al. "First insights into karyotype evolution within the family Mormyridae." Cybium 39, no. 3 (2015): 227–36. https://doi.org/10.26028/cybium/2015-393-006.

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Ozouf-Costaz, Catherine, Coutanceau, Jean-Pierre, Bonillo, Céline, Belkadi, Laurent, Fermon, Yves, Agnese, Jean-François, Guidi-Rontani, Chantal, Paugy, Didier (2015): First insights into karyotype evolution within the family Mormyridae. Cybium 39 (3): 227-236, DOI: 10.26028/cybium/2015-393-006

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16

Meunier, François J., Damien Germain, and Olga Otero. "A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha)." Cybium 42, no. 1 (2018): 87–90. https://doi.org/10.26028/cybium/2018-421-008.

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Meunier, François J., Germain, Damien, Otero, Olga (2018): A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha). Cybium 42 (1): 87-90, DOI: 10.26028/cybium/2018-421-008, URL: http://dx.doi.org/10.26028/cybium/2018-421-008

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17

Meunier, François J., Damien Germain, and Olga Otero. "A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha)." Cybium 42, no. 1 (2018): 87–90. https://doi.org/10.26028/cybium/2018-421-008.

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Meunier, François J., Germain, Damien, Otero, Olga (2018): A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha). Cybium 42 (1): 87-90, DOI: 10.26028/cybium/2018-421-008, URL: http://dx.doi.org/10.26028/cybium/2018-421-008

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18

Meunier, François J., Damien Germain, and Olga Otero. "A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha)." Cybium 42, no. 1 (2018): 87–90. https://doi.org/10.26028/cybium/2018-421-008.

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Meunier, François J., Germain, Damien, Otero, Olga (2018): A histological study of the lingual molariform teeth in Hyperopisus bebe (Mormyridae; Osteoglossomorpha). Cybium 42 (1): 87-90, DOI: 10.26028/cybium/2018-421-008, URL: http://dx.doi.org/10.26028/cybium/2018-421-008

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19

Nazeef, S., and U. M. Abubakar. "Diversity and Condition Factor of Fish Species of Dadin Kowa Dam, Gombe State, Nigeria." Greener Journal of Biological Sciences 3, no. 10 (2013): 350–56. https://doi.org/10.15580/gjbs.2013.10.102313920.

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The diversity and condition factor of fish species of Dadin Kowa Dam were studied over a period of six (6) months (February to July, 2013). Out of the fifteen fish species identified, family Mormyridae had the highest number of three (3) species, followed by families Bagridae and Characidae with two (2) species representing each. Hydrocynus brevis (family Characidae) ranked 22.14%, then Labeo senegalensis (family Cyprinidae), Mormyrus senegalensis (family Mormyridae), Schilbe mytus (family Schilbedae) with 17.40%, 17.01% and 13.05% of the total fish species identified. 60% of the fish species

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20

Lavoué, Sébastien. "Petrocephalus Marcusen, 1854 (Osteoglossomorpha: Mormyridae) of the Bangweulu-Mweru ecoregion (Luapula River system, Congo basin), with the description of a new species." Journal of Natural History 46, no. 35-36 (2012): 2159–78. https://doi.org/10.1080/00222933.2012.708449.

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Lavoué, Sébastien (2012): Petrocephalus Marcusen, 1854 (Osteoglossomorpha: Mormyridae) of the Bangweulu-Mweru ecoregion (Luapula River system, Congo basin), with the description of a new species. Journal of Natural History (J. Nat. Hist.) 46 (35-36): 2159-2178, DOI: 10.1080/00222933.2012.708449, URL: http://dx.doi.org/10.1080/00222933.2012.708449

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21

Moritz, Timo. "Notes on the electric organ discharges (EODs) of four Mormyrus-species (Osteoglossomorpha: Mormyridae) from the Nilo-Sahelo-Sudan ichthyofaunal province of Africa." Cybium 39, no. 1 (2015): 3–10. https://doi.org/10.26028/cybium/2015-391-001.

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Moritz, Timo (2015): Notes on the electric organ discharges (EODs) of four Mormyrus-species (Osteoglossomorpha: Mormyridae) from the Nilo-Sahelo-Sudan ichthyofaunal province of Africa. Cybium 39 (1): 3-10, DOI: 10.26028/cybium/2015-391-001, URL: http://dx.doi.org/10.26028/cybium/2015-391-001

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22

Lavoué, Sébastien, John P. Sullivan, and Matthew E. Arnegard. "African weakly electric fishes of the genus Petrocephalus (Osteoglossomorpha: Mormyridae) of Odzala National Park, Republic of the Congo (Lékoli River, Congo River basin) with description of five new species." Zootaxa 2600 (December 31, 2010): 1–52. https://doi.org/10.5281/zenodo.197589.

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Lavoué, Sébastien, Sullivan, John P., Arnegard, Matthew E. (2010): African weakly electric fishes of the genus Petrocephalus (Osteoglossomorpha: Mormyridae) of Odzala National Park, Republic of the Congo (Lékoli River, Congo River basin) with description of five new species. Zootaxa 2600: 1-52, DOI: 10.5281/zenodo.197589

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23

Kramer, Bernd, and F. Herman Van der Bank. "The Victoria Falls, a species boundary for the Zambezi Parrotfish, Cyphomyrus discorhynchus (Peters, 1852), and the resurrection of Cyphomyrus cubangoensis (Pellegrin, 1936) (Mormyridae: Teleostei)." Journal of Natural History 45, no. 43-44 (2011): 2669–99. https://doi.org/10.1080/00222933.2011.597945.

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Kramer, Bernd, Bank, F. Herman Van der (2011): The Victoria Falls, a species boundary for the Zambezi Parrotfish, Cyphomyrus discorhynchus (Peters, 1852), and the resurrection of Cyphomyrus cubangoensis (Pellegrin, 1936) (Mormyridae: Teleostei). Journal of Natural History 45 (43-44): 2669-2699, DOI: 10.1080/00222933.2011.597945, URL: http://dx.doi.org/10.1080/00222933.2011.597945

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Rich, Madeline, John P. Sullivan, and Carl D. Hopkins. "Rediscovery and description of Paramormyrops sphekodes (Sauvage, 1879) and a new cryptic Paramormyrops (Mormyridae: Osteoglossiformes) from the Ogooué River of Gabon using morphometrics, DNA sequencing and electrophysiology." Zoological Journal of the Linnean Society 180 (May 5, 2017): 613–46. https://doi.org/10.1093/zoolinnean/zlw004.

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Rich, Madeline, Sullivan, John P., Hopkins, Carl D. (2017): Rediscovery and description of Paramormyrops sphekodes (Sauvage, 1879) and a new cryptic Paramormyrops (Mormyridae: Osteoglossiformes) from the Ogooué River of Gabon using morphometrics, DNA sequencing and electrophysiology. Zoological Journal of the Linnean Society 180: 613-646, DOI: 10.1093/zoolinnean/zlw004

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Kramer, Bernd, and Michael Wink. "East-west differentiation in the Marcusenius macrolepidotus species complex in Southern Africa: the description of a new species for the lower Cunene River, Namibia (Teleostei: Mormyridae)." Journal of Natural History 47, no. 35-36 (2013): 2327–62. https://doi.org/10.1080/00222933.2013.798699.

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Kramer, Bernd, Wink, Michael (2013): East-west differentiation in the Marcusenius macrolepidotus species complex in Southern Africa: the description of a new species for the lower Cunene River, Namibia (Teleostei: Mormyridae). Journal of Natural History (J. Nat. Hist.) 47 (35-36): 2327-2362, DOI: 10.1080/00222933.2013.798699, URL: http://dx.doi.org/10.1080/00222933.2013.798699

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26

Bawa, D. Y. "Fish Species Composition and Morphological Descriptions of Five Dominant Families from Inland Waters of Kebbi State-Nigeria." African Journal of Sustainable Agricultural Development 5, no. 2 (2024): 60–69. https://doi.org/10.5281/zenodo.11128019.

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<em>This study was conducted on fish species composition and morphological features of five dominant fish families from the inland waters of Kebbi state, Nigeria between January and December 2022. Three major fishing communities (Argungu, Sabiyel and Yauri) were selected for the study. Fish samples were qualitatively collected using gill nets. The total length and depth of the gill net was 150m and 3m respectively. The mesh size of the minimum 30m net was 1.25 inches, while the medium 30m net was 1.50 inches and maximum 30m net was 1.75. The analysis of the distribution of fish species were an

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Kramer, Bernd, Roger Bills, Paul Skelton, and Michael Wink. "A critical revision of the churchill snoutfish, genus Petrocephalus Marcusen, 1854 (Actinopterygii: Teleostei: Mormyridae), from southern and eastern Africa, with the recognition of Petrocephalus tanensis, and the description of five new species." Journal of Natural History 46, no. 35-36 (2012): 2179–258. https://doi.org/10.1080/00222933.2012.708452.

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Kramer, Bernd, Bills, Roger, Skelton, Paul, Wink, Michael (2012): A critical revision of the churchill snoutfish, genus Petrocephalus Marcusen, 1854 (Actinopterygii: Teleostei: Mormyridae), from southern and eastern Africa, with the recognition of Petrocephalus tanensis, and the description of five new species. Journal of Natural History 46 (35-36): 2179-2258, DOI: 10.1080/00222933.2012.708452, URL: http://dx.doi.org/10.1080/00222933.2012.708452

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Kramer, Bernd, Herman van der Bank, and Michael Wink. "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." Journal of Natural History 48, no. 7-8 (2013): 429–63. https://doi.org/10.1080/00222933.2013.807950.

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Kramer, Bernd, Bank, Herman van der, Wink, Michael (2013): 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. Journal of Natural History (J. Nat. Hist.) 48 (7-8): 429-463, DOI: 10.1080/00222933.2013.807950, URL: http://dx.doi.org/10.1080/00222933.2013.807950

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Kramer, Bernd, Paul Skelton, Herman Van Der Bank, and Michael Wink. "Allopatric differentiation in the Marcusenius macrolepidotus species complex in southern and eastern Africa: the resurrection of M. pongolensis and M. angolensis, and the description of two new species (Mormyridae, Teleostei)." Journal of Natural History 41, no. 9-12 (2007): 647–708. https://doi.org/10.1080/00222930701250987.

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Kramer, Bernd, Skelton, Paul, Bank, Herman Van Der, Wink, Michael (2007): Allopatric differentiation in the Marcusenius macrolepidotus species complex in southern and eastern Africa: the resurrection of M. pongolensis and M. angolensis, and the description of two new species (Mormyridae, Teleostei). Journal of Natural History 41 (9-12): 647-708, DOI: 10.1080/00222930701250987, URL: http://dx.doi.org/10.1080/00222930701250987

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Souley, S. M. N., M. Harouna, M. I. Ado, and I. Youssoufa. "Length-weight relationships and condition factors of Mormyridae species in the Niger River: implications for conservation and management." Limnology and Freshwater Biology, no. 2 (2025): 215–21. https://doi.org/10.31951/2658-3518-2025-a-2-215.

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The length-weight relationship and condition factor of the ten most abundant Mormyridae species in the Niger River at Niamey were examined from August to November 2023. The species assessed were Mormyrus rume, Campylomormyrus tamandua, Pollimyrus isidori, Brienomyrus niger, Hyperopisus bebe, Mormyrus macrophthalmus, Mormyrops anguilloides, Brevimyrus niger, Mormyrops oudoti, Cyphomyrus Psittacus, and Marcusenius cyprinoides. Analysis of their length-weight relationships revealed “b” values ranging from 2.08 to 2.87, suggesting negative allometric growth across all species. Condition factor (k)

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31

Harder, Wilhelm. "Nachweis aktiver (elektrischer) Ortung bei Mormyridae (Teleostei, Pisces)." Zeitschrift für Tierpsychologie 30, no. 1 (2010): 94–102. http://dx.doi.org/10.1111/j.1439-0310.1972.tb00845.x.

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32

Noe, Angela, and Peter Kunze. "HPLC-Determination of Apomorphine in a Mormyrid Fish, Gnathonemus petersii." Zeitschrift für Naturforschung C 44, no. 11-12 (1989): 917–19. http://dx.doi.org/10.1515/znc-1989-11-1207.

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Abstract Uptake of apomorphine and elimination kinetics in brain and muscle tissue of the weakly electric fish Gnathonemus petersii (Mormyridae) was determined by HPLC. 20 min exposure of the fish to apomorphine in the aquarium water (0.4 mg/1) resulted in a concentration factor of 1.09 for brain and 0.55 for muscle tissue. Elimination from brain tissue can be described with first order kinetics (t1/2 = 2.4 h).

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Simanovsky, Sergey, Dmitry Medvedev, Fekadu Tefera, and Alexander Golubtsov. "Derived karyotypes in two elephantfish genera (Hyperopisus and Pollimyrus): lowest chromosome number in the family Mormyridae (Osteoglossiformes)." Comparative Cytogenetics 15, no. 4 (2021): 345–54. http://dx.doi.org/10.3897/compcytogen.v15.i4.67681.

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The African weakly electric elephantfish family Mormyridae comprises 22 genera and almost 230 species. Up-to-date cytogenetic information was available for 17 species representing 14 genera. Here we report chromosome number and morphology in Hyperopisus bebe (Lacepède, 1803) and Pollimyrus isidori (Valenciennes, 1847) collected from the White Nile system in southwestern Ethiopia. Both taxa displayed the diploid chromosome number 2n = 40, but they differed in fundamental numbers: FN = 66 in H. bebe and FN = 72 in P. isidori; previously the same diploid chromosome number 2n = 40 was reported in

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Simanovsky, Sergey, Dmitry Medvedev, Fekadu Tefera, and Alexander Golubtsov. "First cytogenetic information for five Nilotic elephantfishes and a problem of ancestral karyotype of the family Mormyridae (Osteoglossiformes)." Comparative Cytogenetics 14, no. 3 (2020): 387–97. http://dx.doi.org/10.3897/compcytogen.14i3.52727.

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The elephantfish family Mormyridae is the most diverse lineage of the primitive teleostean clade Osteoglossomorpha distributed in inland waters of all continents except Antarctica and Europe. The family Mormyridae is endemic to Africa and includes 22 genera and almost 230 species. The evolutionary radiation of mormyrids most probably should be attributed to their capability of both generating and receiving weak electric signals. Up-to-date cytogenetic studies have revealed substantial karyotype differentiation among the nine investigated elephantfish species and genera (a single species studie

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Nwadike, C. C., P. C. O. Ilozumba, E. C. Amaechi, et al. "Prevalence of helminth parasites in some commercially important fish species of River Anambra, Nigeria." Zoologist (The) 22, no. 1 (2024): 46–52. http://dx.doi.org/10.4314/tzool.v22i1.7.

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The demand for fish as a source of protein is on the increase. However, sustainable productivity by fish farmers is constrained by parasitic infections. Thus, an investigation was conducted on the prevalence of helminth parasites in some commercially important fish species of River Anambra, Nigeria. A total of 521 fishes belonging to 6 families (Claroteidae, Synodontidae, Mormyridae, Osteoglossidae, Bagridae, and Clariidae) and 20 species caught with hooks, nets, and local traps were examined using standard parasitological techniques. The overall prevalence was 23.80%. Fish samples belonging t

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Simanovsky, Sergey, Dmitry Medvedev, Fekadu Tefera, and Alexander Golubtsov. "First cytogenetic information for five Nilotic elephantfishes and a problem of ancestral karyotype of the family Mormyridae (Osteoglossiformes)." Comparative Cytogenetics 14, no. (3) (2020): 387–97. https://doi.org/10.3897/CompCytogen.14i3.52727.

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The elephantfish family Mormyridae is the most diverse lineage of the primitive teleostean clade Osteoglossomorpha distributed in inland waters of all continents except Antarctica and Europe. The family Mormyridae is endemic to Africa and includes 22 genera and almost 230 species. The evolutionary radiation of mormyrids most probably should be attributed to their capability of both generating and receiving weak electric signals. Up-to-date cytogenetic studies have revealed substantial karyotype differentiation among the nine investigated elephantfish species and genera (a single species studie

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Simanovsky, Sergey, Dmitry Medvedev, Fekadu Tefera, and Alexander Golubtsov. "Derived karyotypes in two elephantfish genera (Hyperopisus and Pollimyrus): lowest chromosome number in the family Mormyridae (Osteoglossiformes)." Comparative Cytogenetics 15, no. (4) (2021): 345–54. https://doi.org/10.3897/compcytogen.v15.i4.67681.

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The African weakly electric elephantfish family Mormyridae comprises 22 genera and almost 230 species. Up-to-date cytogenetic information was available for 17 species representing 14 genera. Here we report chromosome number and morphology in Hyperopisus bebe (Lacepède, 1803) and Pollimyrus isidori (Valenciennes, 1847) collected from the White Nile system in southwestern Ethiopia. Both taxa displayed the diploid chromosome number 2n = 40, but they differed in fundamental numbers: FN = 66 in H. bebe and FN = 72 in P. isidori; previously the same diploid chromosome number 2n = 40 was reported in

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Scheffel, Andreas, and Bernd Kramer. "Electrocommunication and Social Behaviour in Marcusenius senegalensis (Mormyridae, Teleostei)." Ethology 103, no. 5 (2010): 404–20. http://dx.doi.org/10.1111/j.1439-0310.1997.tb00156.x.

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Crawford, John D., Mary Hagedorn, and Carl D. Hopkins. "Acoustic communication in an electric fish,Pollimyrus isidori (Mormyridae)." Journal of Comparative Physiology A 159, no. 3 (1986): 297–310. http://dx.doi.org/10.1007/bf00603976.

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Moritz, T., and K. E. Linsenmair. "The air-breathing behaviour of Brevimyrus niger (Osteoglossomorpha, Mormyridae)." Journal of Fish Biology 71, no. 1 (2007): 279–83. http://dx.doi.org/10.1111/j.1095-8649.2007.01473.x.

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Olopade, Olaniyi Alaba. "Preliminary Observations on the Family Mormyridae in Oyan Dam Lake (Nigeria)." Transylvanian Review of Systematical and Ecological Research 15, no. 1 (2013): 33–48. http://dx.doi.org/10.2478/trser-2013-0004.

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ABSTRACT This study was carried out to investigate the abundance, distribution, diversity and condition factor of Mormyrids in Oyan Dam lake, Abeokuta North Local Government Area of Ogun State, Nigeria. The fish were sampled from the catches of the fishermen in Oyan Dam lake, which used gillnets of 30-80 mm laterally stretched mesh size. The fish were sampled monthly between February and September 2011, at two different sites (Imala and Ibaro). The results revealed that a total number of 100 fishes of six species belonging to the family Mormyridae were collected. Numerically, catches were domi

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Stell, S. K., and P. Moller. "Anal-fin ray morphology indicates sexual maturity inBrevimyrus niger(Teleostei, Mormyridae)." Journal of Fish Biology 90, no. 1 (2016): 147–55. http://dx.doi.org/10.1111/jfb.13163.

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Crockett, David P. "Agonistic behavior of the weakly electric fish, Gnathonemus petersii (Mormyridae, Osteoglossomorpha)." Journal of Comparative Psychology 100, no. 1 (1986): 3–14. http://dx.doi.org/10.1037/0735-7036.100.1.3.

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Sullivan, John P., Carl D. Hopkins, Stacy Pirro, et al. "Mitogenome recovered from a 19th Century holotype by shotgun sequencing supplies a generic name for an orphaned clade of African weakly electric fishes (Osteoglossomorpha, Mormyridae)." ZooKeys 1129 (November 16, 2022): 163–96. http://dx.doi.org/10.3897/zookeys.1129.90287.

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Heteromormyrus Steindachner, 1866, a genus of Mormyridae (Teleostei: Osteoglossomorpha), has been monotypic since the description of Heteromormyrus pauciradiatus (Steindacher, 1866) from a single specimen. No type locality other than “Angola” was given and almost no specimens have been subsequently identified to this species. In order to investigate the relationship of this taxon to fresh specimens collected in Angola and elsewhere, whole genome paired-end sequencing of DNA extracted from the holotype specimen of Heteromormyrus pauciradiatus was performed and a nearly complete mitogenome assem

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Sullivan, John P., Carl D. Hopkins, Stacy Pirro, et al. "Mitogenome recovered from a 19 th Century holotype by shotgun sequencing supplies a generic name for an orphaned clade of African weakly electric fishes (Osteoglossomorpha, Mormyridae)." ZooKeys 1129 (November 16, 2022): 163–96. https://doi.org/10.3897/zookeys.1129.90287.

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Heteromormyrus Steindachner, 1866, a genus of Mormyridae (Teleostei: Osteoglossomorpha), has been monotypic since the description of Heteromormyrus pauciradiatus (Steindacher, 1866) from a single specimen. No type locality other than "Angola" was given and almost no specimens have been subsequently identified to this species. In order to investigate the relationship of this taxon to fresh specimens collected in Angola and elsewhere, whole genome paired-end sequencing of DNA extracted from the holotype specimen of Heteromormyrus pauciradiatus was performed and a nearly complete mitogenome assem

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Mahamba, B.R., K.V. Kangela, B.A. Kankonda, A.P.J. Ulyel, and J.C. Micha. "Etude des peuplements ichtyologiques des rivières Yoko et Biaro (Réserve de Yoko, Province Tshopo, R.D. Congo)." Revue Scientifique et Technique Forêt et Environnement du Bassin du Congo 11 (October 1, 2018): 49–65. https://doi.org/10.5281/zenodo.1437214.

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<strong>Résumé</strong> L’étude sur l’ichtyofaune dans deux rivières forestières Yoko et Biaro à Ubundu de septembre 2008 à août 2009, avait pour but de caractériser les peuplements des poissons  et déterminer les facteurs responsables de leur répartition spatio-temporelle. Plusieurs techniques ont été utilisées pour la récolte des poissons : filets maillants,  palangres et nasses. La caractérisation des habitats a été faite selon une fiche de suivi

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Shabani, Ekyamba, Ernest Lukusha Tambwe, Oscar Ndeo Wembo, Alain Bolonga Bolonga, Roger Bolaya Lingofo, and Alidor Busanga Kankonda. "Ichthyofauna in the Lomami National Park and Its Hinterlands, Democratic Republic of the Congo." Asian Journal of Fisheries and Aquatic Research 25, no. 3 (2023): 166–84. http://dx.doi.org/10.9734/ajfar/2023/v25i3676.

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This investigation deals with freshwater fish populations in thirteen sampling rivers of Lomami National Park (LNP) and its hinterlands. The study aimed to inventory the ichthyofauna in freshwater bodies of LNP and its hinterlands; determine fish species with high economic value according to preference by riparian communities; and assess the conservation status of fish species. Intensive fish sampling was conducted thirteen rivers of LNP and its hinterlands using gill nets with stretched mesh sizes of 9.5, 10, 12, 15 and 20 mm in 2016. A survey questionnaire was administered to fishermen in or

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Mambo Baba, Taylor, Tchalondawa Kisekelwa, Célestin Danadu Mizani, Eva Decru, and Emmanuel Vreven. "Hidden species diversity in Marcusenius moorii (Teleostei: Mormyridae) from the Congo Basin." Journal of Fish Biology 96, no. 5 (2020): 1100–1122. http://dx.doi.org/10.1111/jfb.14226.

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Lewis, J. W., A. N. Kay, and N. S. Hanna. "Responses of the electric fishGnathonemus tamandua(family mormyridae) to changes in ph." Environmental Technology 13, no. 8 (1992): 701–5. http://dx.doi.org/10.1080/09593339209385201.

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Lewis, J. W., A. N. Kay, and N. S. Hanna. "Responses of electric fish (family mormyridae) to inorganic nutrients and triubinryltin oxide." Chemosphere 31, no. 7 (1995): 3753–69. http://dx.doi.org/10.1016/0045-6535(95)00250-c.

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