Cyanocharax alburnus ( Hensel, 1870 )

Malabarba, Luiz R. & Weitzman, Stanley H., 2003, Description Of A New Genus With Six New Species From Southern Brazil, Uruguay And Argentina, With A Discussion Of A Putative Characid Clade (Teleostei: Characiformes: Characidae), Comun. Mus. Ciênc. Tecnol. PUCRS 16 (1), pp. 67-151 : 141

Cyanocharax alburnus ( Hensel, 1870)

Figs. 50-51

Tetragonopterus alburnus Hensel, 1870: 85 . Type locality: Rio Cadea [rio Cadeia, tributary of rio Cai, Rio Grande do Sul, Brazil]. Holotype: ZMB 7477.

Bryconamericus alburnus . ‒ Eigenmann, 1910 (new combination).

Astyanax hasemani Eigenmann in Eigenmann, Henn & Wilson, 1914: 10. Type locality: Porto Alegre [Brazil]. Holotype: FMNH 56659 [ex CM 5476]. - Géry, 1977 (discussion of the generic position). - Malabarba, 1983 (Redescription, discussion of possible relationships and figures). - Malabarba, 1987 (placed as junior synonym of Astyanax alburnus (Hensel) ; holotype figured).

Astyanax alburnus . ‒ Malabarba, 1987: valid, placed as senior synonym of Astyanax hasemani Eigenmann.

Diagnosis. The presence of a complete series of 36-39 perforated scales in the lateral line differentiate C. alburnus from C. tipiaia , C. lepiclastus , C. alegretensis , and C. macropinna all of which have interrupted lateral lines. The unpigmented adipose fin of C. alburnus distinguishes it from C. itaimbe and C. dicropotamicus .

Description. A description of this species is given in Malabarba (1983) and it is not repeated here.

Figures

Figure 50. Cyanocharax alburnus, arroio Tipiáia, Júlio de Castilhos, Rio Grande do Sul, Brazil (MCP 26852).

Figure 51. Jaws and teeth of Cyanocharax alburnus (MCP 9100, 55.0 mm SL). A-D - Maxilla and detailed view of teeth; B-E ‒ Premaxilla and detailed view of teeth; C-F- Dentary and detailed view ofteeth.