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Article
Published: 2019-08-09

A new species of suckermouth catfish (Mochokidae: Chiloglanis) from the Rio Mongo in Equatorial Guinea

Biology Department, Randolph-Macon College, Ashland, VA 23005, USA Smithsonian Research Associate, National Museum of Natural History, Division of Fishes, Washington, DC 20560, USA
Wildlife Conservation Society, Equatorial Guinea. Edificio Candy Vista Mar Of. 208 Bata Litoral, Equatorial Guinea
Pisces Endemism specimen collection allometric correction biodiversity

Abstract

A recent expedition surveyed freshwater fishes throughout the continental portion of Equatorial Guinea (Rio Muni). This portion of the Lower Guinean ichthyoprovince is relatively unknown with very few collections occurring since the 1960s. Sampling in the Rio Mongo, a tributary to the Rio Wele, yielded two Chiloglanis species; one putatively ascribed to the widespread species C. cameronensis, and the other species having similarities with C. harbinger described from the Lokoundje River in Cameroon. Morphometric analyses between the specimens from Rio Mongo and paratypes of C. harbinger confirm that they are distinct species and should be described as such. Here we describe Chiloglanis mongoensis sp. nov., a narrow endemic species only known from one locality in the Rio Mongo. We provide measurements from paratypes of C. harbinger and emphasize the need for further expeditions in the area.

 

References

  1. Bart Jr., H.L., Schmidt, R.C., Nyingi, W.D. & Gathua, J. (2019) A new species of cyprinoid fish from the Tana River, Kenya (Actinopterygii: Danionidae). Zootaxa, in press.

    Boulenger, G.A. (1904) Descriptions of new West-African freshwater fishes. Annals and Magazine of Natural History (Series 7), 14 (79), 16–20.

    https://doi.org/10.1080/03745480409442961

    Chakona, A., Swartz, E.R. & Gouws, G. (2013) Evolutionary drivers of diversification and distribution of a southern temperate stream fish assemblage: Testing the role of historical isolation and spatial range expansion. PLoS ONE, 8 (8), e70953.

    https://doi.org/10.1371/journal.pone.0070953

    Cope, E.D. (1867) Supplement on some new species of American and African fishes. Transactions of the American Philosophical Society, 13 (3), 400–407.

    Friel, J.P. & Vigliotta, T.R. (2011) Three new species of African suckermouth catfishes, genus Chiloglanis (Siluriformes: Mochokidae), from the lower Malagarasi and Luiche rivers of western Tanzania. Zootaxa, 3063 (1), 1–21.

    https://doi.org/10.11646/zootaxa.3063.1.1

    Hayes, M.M. & Armbruster, J.W. (2017) The taxonomy and relationships of the African small barbs (Cypriniformes: Cyprinidae). Copeia, 105 (2), 348–362.

    https://doi.org/10.1643/CI-15-348

    IUCN (2019) The IUCN Red List of Threatened Species. Version 2019-1. Available from: http://www.iucnredlist.org (accessed 28 May 2019)

    Lasso, C., Castelo, R. & Rial, A. (1998) Peces del parquet nacional de Monte Alen, Cuenca del Rio Uoro (Rio Muni), Guinea Ecuatorial, Number 11, Publicaciones de la asociacion de amigos de Donana, Sevilla, Spain. 32 p

    Mipounga, H.K., Cutler, J., Mve Beh, J.H., Adam, B. & Sidlauskas, B.L. (2019) Enteromius pinnimaculatus sp. nov. (Cypriniformes: Cyprinidae) from southern Gabon. Journal of fish biology, 2019, 1–16.

    https://doi.org/10.1111/jfb.13995

    Morris, J., Ford, A.G., Ali, J.R., Peart, C.R., Bills, R. & Day, J.J. (2016) High levels of genetic structure and striking phenotypic variability in a sexually dimorphic suckermouth catfish from the African Highveld. Biological journal of the Linnaean Society, 117 (3), 528–546.

    https://doi.org/10.1111/bij.12650

    Pappenheim, P. (1911) Zoologische Ergebnisse der Expedition des Herrn G. Tessmann nach Süd-Kamerun und Spanisch-Guinea. Fische. Mitteilungen aus dem Zoologischen Museum in Berlin, 5 (3), 505–528.

    https://doi.org/10.1002/mmnz.4830050312

    Roberts, T.R. (1989) Systematic revision and description of new species of suckermouth catfishes (Chiloglanis, Mochokidae) from Cameroun. Proceedings of the California Academy of Natural Sciences, 46 (6), 151–178.

    Rocha, L.A., Aleixo, A., Allen, G., Almeda, F., Baldwin, C.C., Barclay, M.V., ... & Berumen, M.L. (2014) Specimen collection: An essential tool. Science, 344 (6186), 814–815.

    https://doi.org/10.1126/science.344.6186.816-a

    Román, B. (1971) Peces de Río Muni, Guinea Ecuatorial:(Aguas dulces y salobres). Fundacion La Salle de Ciencias Naturales, Barcelona, Spain, 295 p

    Sabaj, M.H. (2016) Standard symbolic codes for institutional resource collections in herpetology and ichthyology: an Online Reference. Version 6.5. American Society of Ichthyologists and Herpetologists, Washington, DC. Available from: http://www.asih.org/ (accessed 16 August 2016)

    Schmidt, R.C., Bart Junior, H.L., Nyingi, D.W. & Gichuki, N.N. (2014) Phylogeny of suckermouth catfishes (Mochokidae: Chiloglanis) from Kenya: The utility of Growth Hormone introns in species level phylogenies. Molecular Phylogenetics and Evolution, 79, 415–421.

    https://doi.org/10.1016/j.ympev.2014.07.011

    Schmidt, R.C., Bart Junior, H.L. & Nyingi, W.D. (2015) Two new species of African suckermouth catfishes, genus Chiloglanis (Siluriformes: Mochokidae), from Kenya with remarks on other taxa from the area. Zootaxa, 4044 (1), 45–64.

    https://doi.org/10.11646/zootaxa.4044.1.2

    Schmidt, R.C., Bart Jr, H.L. & Pezold, F. (2016) High levels of endemism in suckermouth catfishes (Mochokidae: Chiloglanis) from the Upper Guinean forests of West Africa. Molecular Phylogenetics and evolution, 100, 199–205.

    https://doi.org/10.1016/j.ympev.2016.04.018

    Schmidt, R.C., Bart Jr., H.L. & Nyingi, W.D. (2017a) Multi-locus phylogeny reveals instances of mitochondrial introgression and unrecognized diversity in Kenyan barbs (Cyprininae: Smiliogastrini). Molecular Phylogenetics and Evolution, 111, 35–43.

    https://doi.org/10.1016/j.ympev.2017.03.015

    Schmidt, R.C., Bart Jr, H.L., Pezold, F. & Friel, J.P. (2017b) A biodiversity hotspot heats up: Nine new species of suckermouth catfishes (Mochokidae: Chiloglanis) from Upper Guinean forest streams in West Africa. Copeia, 105 (2), 301–338.

    https://doi.org/10.1643/CI-16-474

    Schmidt, R.C., Dillon, M.N., Kuhn, N.M., Bart Jr, H.L. & Pezold, F. (2019) Unrecognized and imperiled diversity in an endemic barb (Smiliogastrini, Enteromius) from the Fouta Djallon highlands. Zoologica Scripta, 00, 1–9.

    https://doi.org/10.1111/zsc.12362

    Sidlauskas, B.L., Mol, J.H. & Vari, R.P. (2011). Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname. Zoological Journal of the Linnean Society, 162 (1), 103–130.

    https://doi.org/10.1111/j.1096-3642.2010.00677.x

    Stiassny, M.L., Teugels, G.G. & Hopkins, C.D. (2007) Fresh and brackish water fishes of Lower Guinea, West-Central Africa (Vol. 42). IRD Editions.

    Sullivan, J.P., Peng, Z., Lundberg, J.G., Peng, J. & He, S. (2008) Molecular evidence for diphyly of the Asian catfish family Amblycipitidae (Teleostei: Siluriformes) and exclusion of the South American Aspredinidae from Sisoroidea. Proceedings of the Academy of Natural Sciences of Philadelphia, 157 (1), 51–66.

    https://doi.org/10.1635/0097-3157(2008)157[51:MEFDOT]2.0.CO;2

    Warton, D.I., Wright, I.J., Falster, D.S. & Westoby, M. (2006) Bivariate line-fitting methods for allometry. Biological Reviews, 81 (2), 259-291.

    https://doi.org/10.1017/S1464793106007007