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Issue: Vol. 465 No. 1: 16 Mar. 2004
Type: Article
Published: 2004-03-16
DOI: 10.11646/zootaxa.465.1.1
Page range: 1–12
Abstract views: 85
PDF downloaded: 4

Rivulus uakti sp. n. and R. amanapira sp. n. (Teleostei: Cyprinodontiformes:Rivulidae): two new species from the upper Rio
Negro, Brazilian Amazon

Laboratório de Ictiologia Geral e Aplicada, Departamento de Zoologia, Universidade Federal do Rio de Janeiro, Caixa Postal 68049, CEP 21944-970, Rio de Janeiro, Brasil
Pisces Fish Cyprinodontiformes Rivulidae Rivulus Neotropica Amazon systematics taxo-nomy new species

Abstract

Rivulus uakti, new species, and R. amanapira, new species, from the upper rio Negro drainage, Amazonian basin, northern Brazil, are described. Both species are members of an assemblage, herein denominated R. atratus species group, that includes R. atratus, R. ornatus, R. rectocaudatus, R. romeri and R. tecminae, and is diagnosed by a unique pattern of frontal squamation and a derived color pattern of infraorbital region. The two new species seems to be closely related to R. romeri and R. tecminae by the absence of dermosphenotic and preopercular canal. Rivulus uakti is similar to R. tecminae and R. altivelis by having long pelvic fins, and differs from them by the fewer scales on the longitudinal series and a distinct female color pattern. Rivulus amanapira, similar to R. tecminae and R. rectocaudatus by having a truncate caudal fin in males, is diagnosed by the higher number of scales on the longitudinal series and unique color pattern of males.

References

  1. Costa, W.J.E.M. (1991) Description of two new species of the genus Rivulus (Cyprinodontiformes: Rivulidae) from eastern South American coastal plains. Revue Suisse de Zoologie, 98, 581– 587.

    Costa, W.J.E.M. (1995a) Revision of the Rivulus punctatus species-complex (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters, 6, 207–226.

    Costa, W.J.E.M. (1995b) Pearl killifishes — the Cynolebiatinae: systematics and biogeography of the neotropical annual fish subfamily. TFH, Neptune City, 128 pp.

    Costa, W.J.E.M. (1998) Phylogeny and classification of Rivulidae revisited: evolution of annualism and miniaturization in rivulid fishes (Cyprinodontiformes: Aplocheiloidei). Journal of Comparative Biology, 3, 33–92.

    Costa, W.J.E.M. (2001) The neotropical annual fish genus Cynolebias (Cyprinodontiformes: Rivulidae): phylogenetic relationships, taxonomic revision and biogeography. Ichthyological Exploration of Freshwaters, 12, 333–383.

    Costa, W.J.E.M. (2003a) Family Rivulidae (South American annual fishes). In: Reis, R.E., Kullander, S.O. & Ferraris, C.J., Jr. (eds) Check list of the freshwater fishes of South and Central America. Edipucrs, Porto Alegre, pp 526–548

    Costa, W.J.E.M. (2003b) Rivulus paracatuensis n. sp. (Cyprinodontiformes: Rivulidae): a new rivuline species from the Rio São Francisco basin, Brazil. Aqua Journal of Ichthyology and Aquatic Biology, 7, 39–43.

    Costa, W.J.E.M. (2003c) A new miniature rivuline fish from the upper Negro river basin, northern Brazil (Teleostei, Cyprinodontiformes, Rivulidae). Arquivos do Museu Nacional Rio de Janeiro, 61, 175–178.

    Costa, W.J.E.M. (in press) Relationships and redescription of Fundulus brasiliensis (Cyprinodontiformes: Rivulidae), with description of a new genus and notes on the classification of the Aplocheiloidei. Ichthyological Exploration of Freshwaters.

    Hoedeman, J.J. (1958) Rivulid fishes of the Antilles. Studies on the Fauna of Curaçao and other Caribbean Islands, 32, 112–127.

    Huber, J.H. (1992) Review of Rivulus: ecobiogeografia — relationships. Cybium, Société Française d’Ichtyologie, Paris, 572 + 13 pp.

    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.

    Wallace, A.R. (2002) Peixes do Rio Negro/Fishes of the Rio Negro. EDUSP, São Paulo, 517 pp.