Tatia jaracatia Pavanelli & Bifi, 2009

Almirón, Adriana, Casciotta, Jorge, Azpelicueta, Mercedes, Aichino, Danilo, Benítez, Mauricio, Piálek, Lubomír, Doubnerová, Klára & Říčan, Oldřich, 2014, First record of the genus Tatia (Siluriformes: Auchenipteridae) in freshwaters of Argentina., Ichthyological Contributions of PecesCriollos 27, pp. 1-5 : 2

Tatia jaracatia Pavanelli & Bifi, 2009

( figs. 1-3 )

Material examined

All from: Argentina, Misiones Province, río Iguazú basin, arroyo Deseado (25º40’15.7” S - 53º55’58.7” W): MLP 10608 , 1 ex. 45 mm SL, coll: Almirón, Casciotta & Azpelicueta, February 2001. MLP 10609 , 1 ex., 53.6 mm SL, coll: Casciotta, Říčan, Piálek, November, 2007

Description

Tatia jaracatia is clearly recognizable from its congeners by its colour pattern showing dark flanks with large whitish or pale yellow rounded or oval dots ( figs. 1-3 ). This colour pattern distinguishes this species from T. neivai , the other species inhabiting freshwater environments of Argentina. Morphometric data are presented in table 1 .

Habitat

The depth of arroyo Deseado was variable, averaging about 80 cm. The bottom was composed of mud, sand and mainly gravel. The stream has falls and pools with clear, rapidly flowing water. The pools had scarce submerged vegetation. One specimen was collected above a fall and the other in a large pool below ( fig. 4 ).

Distribution

Tatia jaracatia is restricted to the río Iguazú basin above the Iguazú falls ( Pavanelli & Bifi, 2009). The specimens collected herein come from arroyo Deseado in Misiones Province ( fig. 7 ).

Figures

fig. 1. Tatia jaracatia in live fig. 2. Tatia jaracatia colour in life upon capture

fig. 3. Tatia jaracatia, male. Arroyo Deseado, rio Paraná basin, Misiones, Argentina (MLP 10609)

fig. 4. collecting site ofTatia jaracatiá: Arroyo Deseado, río fig. 5. Juveniles of Tatia neivai: at top 29.3 mm SL; at bottom Iguazú basin, Misiones Province, Argentina 27.5 mm SL

fig. 7. Map showing the collecting sites of Tatia jaracatia (red circle) and T. neivai (white circles) in Argentina: 1. arroyo Deseado | 2. arroyo Piray Guazú | 3. arroyo Garuhapé | 4. arroyo Tabay | 5. arroyo Garupá | 6. río Paraná at Puerto Nemesio Parma | 7. río Paraná at Ituzaingó