Do we know what we are conserving? Fishes from Parque Nacional Aconquija, Tucumán, Northwestern Argentina Author Saravia, Alejandro Nicolás Author Mettola, Víctor Ezequiel Author Aguilera, Gastón Author Cano, Paula Daniela Author Terán, Guillermo Enrique text Acta Zoológica Lilloana 2023 2023-12-07 67 2 327 347 http://dx.doi.org/10.30550/j.azl/1804 journal article 299024 10.30550/j.azl/1804 23b81975-ae39-472d-828b-baaac3cb0956 1852-6098 11645144 Corydoras longipinnis Knaack 2007 Material examined. 2 exemplars; 40.0 mm - 48.7 mm SL. Cl FML 7925 , 2 ex, 27°12’ 36.21”S ; 65°37’ 22.80”W Pueblo Viejo River . Figure 4. Siluriformes : A. Corydoras longipinnis CI FML 7925, 48.7 mm SL. B. Heptapterus qenqo CI FML 7926, 73.9 mm SL. C. Pimelodella laticeps CI FML 7821, 62.7 mm SL. D. Hypostomus paranensis CI FML 7922, 124.4 mm SL. E. Rineloricaria catamarcensis CI FML 7834, 74.9 mm SL. F. Trichomycterus alterus CI FML 7942, 34.6 mm SL. G. Trichomycterus barbouri CI FML 7849, 68.7 mm. SL. H. Trichomycterus corduvensis CI FML 7935, 60.1 mm SL. Figura 4. Siluriformes : A. Corydoras longipinnis CI FML 7925, 48,7 mm SL. B. Heptapterus qenqo CI FML 7926, 73,9 mm SL. C. Pimelodella laticeps CI FML 7821, 62,7 mm SL. D. Hypostomus paranensis CI FML 7922, 124,4 mm SL. E. Rineloricaria catamarcensis CI FML 7834, 74,9 mm SL. F. Trichomycterus alterus CI FML 7942, 34,6 mm SL. G. Trichomycterus barbouri CI FML 7849, 68,7 mm. SL. H. Trichomycterus corduvensis CI FML 7935, 60,1 mm SL. Identification. Body completely covered with 2 longitudinal rows of plates on the flanks; number of plates in the upper row of the dorsal base 20-21; number of plates in the lower row of the ventral base 18-20; short barbels that do not reach the base of the pectoral fins; short snout 43.5-52.6 % in head length (HL); dorsal and pectoral fin elongated in males; anterior region of the dorsal fin with black spots or bars ( Knaack, 2007 ; Tencatt et al., 2016 ).