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Issue: Vol. 1614 No. 1: 15 Oct. 2007
Type: Article
Published: 2007-10-15
DOI: 10.11646/zootaxa.1614.1.2
Page range: 17–29
Abstract views: 53
PDF downloaded: 35

Micralestes (Characiformes, Alestidae) of the lower Congo River, with a description of a new species endemic to the lower Congo River rapids in the Democratic Republic of Congo

American Museum of Natural History, Department of Ichthyology, Central Park West at 79th Street, New York, NY 10024, USA
Institut de Développement Rural, Université Marien Ngouabi, B.P. 69 Brazzaville, Republic of Congo
Characiformes Micralestes lower Congo River identification key new species

Abstract

A new dwarf alestid from the vicinity of Inga on the lower Congo River, Bas Congo Province, Democratic Republic of Congo is described. Assignment of the new taxon to the poorly defined genus, Micralestes, is discussed and justified on the basis of available morphological character data. With the recognition of Micralestes schelly sp. nov., a total of six Micralestes are now known to inhabit the 350 km stretch of the Congo River from Pool Malebo to Boma near the river’s estuary. These are Micralestes acutidens (Peters, 1852), Micralestes humilis Boulenger, 1899, Micralestes lualabae Poll, 1967, Micralestes holargyreus (Günther, 1873), Micralestes stormsi Boulenger, 1902, and the new species Micralestes schelly. Of these Micralestes schelly and Micralestes holargyreus are considered herein as restricted-range endemics of the lower Congo River. An illustrated key to Micralestes of the lower Congo River is provided.

References

  1. Géry, J. (1995) Description of a new or poorly known Alestinae (Teleostei : Characiformes : Alestidae) from Africa, with a note on the generic concept in the Alestinae. Aqua 1(4), 37–64.
    Leviton, A. E., Gibbs, R. H., Heal, J. E. & Dawson, C. E. (1985) Standards in herpetology ad ichthyology: Part 1. Standard symbolic codes for institutional resource collections in herpetology and ichthyology. Copeia, 1985, 802–832.
    Paugy, D. (1986) Révision systématique des Alestes et Brycinus africains (Pisces, Characidae). O.R.S.T.O.M. Etudes et Thèses, 1–296 .
    Paugy, D. & Schaefer, S.A. (in press). Alestidae. in Stiassny, M.L.J., Teugels, G.G. & Hopkins, C.D. (eds.) Fresh and Brackish Water Fishes of West Central Africa. IRD, MNHN, MRAC, Collection Faune et Flore Tropicale.
    Paugy, D., Lévêque, C. & Teugels, G. G. (2003) The fresh and brackish water fishes of West Africa. Volume 1. Faune et Flore tropicales 40. IRD, Paris, MNHN, Paris & MRAC, Tervuren, 1–457.
    Poll, M. (1967) Révision des Characidae nains africains. Annales Musée Royal de l’Afrique Centrale (ser. 8), 162, 1–158.
    Roberts, T. R. & Stewart, D. J. (1976) An ecological and systematic survey of fishes in the rapids of the lower Zaire or Congo River. Bulletin of the Museum of Comparative Zoology, 147, 239–317.
    Stiassny, M.L.J. & Schaefer, S.A. (2005) Rhabdalestes aeratis, new species (Characiformes: Alestidae): first occurrence of the genus from the Middle Congo River basin. Ichthyological Exploration of Freshwaters, 16 (3), 271–278.
    Taylor, W. R. & Van Dyke, G. C. (1985) Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage study. Cybium, 9, 107–109.
    Zanata, A.M. & Vari, R.P. (2005) The family Alestidae (Ostariophysi, Characiformes) : a phylogenetic analysis of a trans-Atlantic clade. Zoological Journal of the Linnean Society, 145, 1–144.