Astyanax intermedius Eigenmann, 1908

de Brito, Victor & Buckup, Paulo Andreas, 2019, The fish fauna of the upper Piraí drainage, a transposed mountain river system in southeastern, Brazil, Check List 15 (1), pp. 235-247 : 238-239

publication ID 10.15560/15.1.235

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Astyanax intermedius Eigenmann, 1908


Astyanax intermedius Eigenmann, 1908

Figure 2C

Geographic distribution: Paraíba do Sul and Doce river basins and coastal rivers of Rio de Janeiro state

Figure 2. Fish species collected in upper Piraí river drainage. A. Astyanax giton, MNRJ 37986, 63.6 mm SL. B. Hypomasticus mormyrops, MNRJ 46698,128.6 mm SL. C. Astyanax intermedius, MNRJ 43805, 77.2 mm SL. D. Hoplias malabaricus, MNRJ 43830, 70.8 mm SL. E. Astyanax sp. aff. scabripinnis, MNRJ 36427, 71.8 mm SL. F. Characidium lauroi, MNRJ 43823, 57.3 mm SL. G. Brycon opalinus, MNRJ 47259, 116.6 mm SL. H. Characidium vidali, MNRJ 43807, 66.6 mm SL. I. Oligosarcus hepsetus, MNRJ 43812, 63.1 mm SL.

( Lezama et al. 2011).

Diagnosis: Astyanax intermedius differs from A. giton by body depth less than 41% of SL and abrupt reduction of tooth size posterior to the fifth dentary tooth ( Melo 2001a). Also, in contrast with A. giton , the posterior portion of pelvic fin in A. intermedius does not surpass the urogenital opening in this species. Astyanax intermedius can be distinguished from Astyanax sp. aff. scabripinnis, by the presence of 5 cusps in most dentary teeth and regular sized adipose fin.