Oligosarcus itau Mirande, Aguilera & Azpelicueta 2011

Cancino, Fabiana, Ramallo, Geraldine & Terán, Guillermo, 2024, First record of Oligosarcus itau (Characiformes: Characidae) outside the type locality, and second after the description, Acta Zoológica Lilloana 68 (1), pp. 141-147 : 143

Oligosarcus itau Mirande, Aguilera & Azpelicueta 2011 .

Figures 2 , 3 .

Argentina, Jujuy CI-FML 8079 1 ex., 49.7 mm SL. El Carmen Department, Las Pavas River (24º26’37.7’’S, 65º13’01.3”W) ( Figure 4 ). Bermejo River basin. Coll. F. Cancino and G. Ramallo. March 2022 . CI-FML 8080 11 ex. 55.21 – 42.5 mm SL. El Carmen Department, La Ciénaga dam (24°25’50.10’’S, 65°16’41.0’’W) ( Figure 5 ). Bermejo River basin. Coll. F. Cancino and G. Ramallo. November 2022 .

The specimens collected in Jujuy province, present the following diagnostic characters: a) presence of two well-distinct rows of premaxillary teeth; b) presence of pentacuspidate dentary teeth c) presence of 8–13 maxillary teeth; d) 21–23 branched anal-fin rays; e) 18–19 circumpeduncular scales; f) 41–42 lateral-line scales; g) transverse scale: 9/5–7. This combination of characters allow the identification of these specimens as Oligosarcus itau .

Figures

Figure 2. Specimens of Oligosarcus itau reported herein. CI-FML 8080 (first and second) CI-FML 8079 (below). 49.7- 51.7 mm SL.

Figure 3. Jaws, palatine and ectopterygoid of Oligosarcus itau CI-FML 8080. 49.8 mm SL. Anterior to left. Lateral view.

Figure 4. Las Pavas River at 24º26’37.7’’S, 65º13’01.3”W, El Carmen Department, Jujuy Province.

Figure 5. La Ciénaga dam 24°25’50.10’’S, 65°16’41.0’’W. El Carmen Department, Jujuy Province.