To cite this article: J. Géry (1972): Corrected and supplemented descriptions of certain characoid fishes described by Henry W. Fowler, with revisions of several of their genera , Studies on Neotropical Fauna, 7:1, 1-35
Laguna Negra (MG 5) (loc. 13) S., Montiel Potrero (MG 2) (loc. 38) Ao. Sombrero Piri (C. D.) (loc. 43) S., Rio Montelindo (C. D.) (loc. 45) S., Estero Patino (C. D.) (loc. 48) Rio Aguara-Guazu (C. D.) (loc. 50) 1 ex., 104 mm L. S., marécage du Rio Confuso (C. D.) (loc. 51) Rio Parana 1 ex., 200 mm L. S., Panchito Lopez (MG 2) (loc 72) Extra-territorial 1 ex., 190 mm L. S., sympatrique de Erythrinus erythrinus au sud de la Bolivie.Ces exemplaires paraissent assez courts (hauteur 3,3 à 3,9 dans la L. S., 4,6 chez un spécimen) et de coloration uniforme sur le corps; ils sont tout à fait conformes à la figure de Ringuelet et al. (loc. cit.: 255). Tête 3,0-3,2 dans la L. S., Sq. 3/33-35/3 1/2, 13 écailles prédorsales, 16 autour du pédicule caudal. D'après nos récoltes H. unitaeniatus représente un élément typique de la faune chacoenienne.
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