Fig 1.
Trichomycterus ytororo, holotype, CI–FML 7240, 94.2 mm SL; Argentina, Misiones Province, Jardín América, Tabay stream, Paraná River basin.
Fig 2.
Trichomycterus ytororo, live specimens (A). holotype CI–FML 7241, 94.2 mm. (B–D). paratype CI–FML 7241, 60.9 mm SL.
Argentina, Misiones, Jardín América, Tabay stream, Paraná River basin.
Fig 3.
Left lateral view of the caudal peduncle of Trichomycterus ytororo.
Paratype c&s specimen, CI–FML 7241, 67.3 mm SL. Abbreviations: DPR: dorsal procurrent caudal-fin rays, PH+H1+2 = lower caudal plate comprised by co-ossification of parhypural and hypurals 1 and 2; H4+5 = plate comprised by co-ossification of hypurals 4 and 5; pu1 + u1 = preural centrum 1 and ural centrum 1, pu2 = preural centrum 2; PS: pleurostile, VPR: ventral procurrent caudal-fin rays.
Table 1.
Comparative characters among the species assigned to the Trichomycterus stawiarski group and its possible sister taxon T. perkos.
Table 2.
Morphometric data for Trichomycterus ytororo: holotype and paratypes (n = 12).
SD: standard deviation. Range, Mean and SD include holotype.
Fig 4.
Geographic distribution of the species assigned to the Trichomycterus stawiarski group: T. crassicaudatus (green symbols), T. igobi (white symbols), T. stawiarski (yellow symbols) and T. ytororo (red symbol).
Stars represent the type localities. Some triangles symbols represent more than one collection locality. Numbers 1, 2, 3 indicate the Paraguay, Paraná and Iguazú Rivers, respectively.
Fig 5.
Type locality of Trichomycterus ytororo; Tabay waterfalls, Tabay stream, Jardín América, Misiones, Argentina.