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Neotropical Ichthyology

versão impressa ISSN 1679-6225

Resumo

VARELLA, Henrique R.; KULLANDER, Sven O.  e  LIMA, Flávio C. T.. Crenicichla chicha, a new species of pike cichlid (Teleostei: Cichlidae) from the rio Papagaio, upper rio Tapajós basin, Mato Grosso, Brazil. Neotrop. ichthyol. [online]. 2012, vol.10, n.2, pp.233-244. ISSN 1679-6225.  http://dx.doi.org/10.1590/S1679-62252012000200002.

Crenicichla chicha, new species, occurs in clear, fast-running waters with rocky substrates in the rio Papagaio and tributaries. It is distinguished from all other Crenicichla species by the combination of two character states: infraorbitals 3 and 4 co-ossified (vs. separated) and 66-75 scales in the row immediately above to that containing the lower lateral line (E1 row scales). Crenicichla chicha shares a smooth preopercular margin, co-ossification of infraorbitals 3 and 4, and some color features with C. hemera from the adjacent rio Aripuanã drainage, rio Madeira basin. It differs from Crenicichla hemera in more E1 scales (66-75 vs. 58-65) and presence of a conspicuous black narrow stripe running from infraorbital 3 obliquely caudoventrad toward the preopercular margin vs. a rounded and faint suborbital marking present on infraorbitals 3-4. Examination of the type series and additional material from the rio Aripuanã confirms that Crenicichla guentheri Ploeg, 1991 is a junior subjective synonym of C. hemera Kullander, 1990.

Palavras-chave : Crenicichla guentheri; Crenicichla hemera; Jacundá; Osteology; Rio Juruena.

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