Any colour you like: new records of ornamental livebearers (Poeciliidae: Cyprinodontiformes) from freshwaters of Argentina. Author Terán, Guillermo E. Fundación Miguel Lillo, Unidad Ejecutora Lillo (CONICET-FML), Miguel Lillo 251, 4000 San Miguel de Tucumán guilloteran@gmail.com Author Koerber, Stefan Independent researcher. Friesenstr. 11, 45476 Muelheim, Germany. pecescriollos @ koerber-germany. de pecescriollos@koerber-germany.de Author Stazzonelli, Juan Carlos Fundación Miguel Lillo, Miguel Lillo 251, 4000 San Miguel de Tucumán, Argentina Author Aguilera, Gastón Fundación Miguel Lillo, Unidad Ejecutora Lillo (CONICET-FML), Miguel Lillo 251, 4000 San Miguel de Tucumán Author Mirande, J. Marcos Fundación Miguel Lillo, Unidad Ejecutora Lillo (CONICET-FML), Miguel Lillo 251, 4000 San Miguel de Tucumán text Ichthyological Contributions of PecesCriollos 2022 2022-03-15 80 1 8 journal article 298606 10.5281/zenodo.11558417 d37631a4-f113-42bf-abd6-10f034777748 1868-3703 11558417 Poecilia reticulata - first record from the Salí river basin figs. 16-19 CI-FML 7808, 12 ex. ( 6 males , 6 females ), 14.2-22.43 mm SL. Bajo Hondo stream in Parque Guillermina , Salí river basin, Tucumán . 26°49’21”S , 65°15’30”W . coll.: J.C. Stazzonelli & G. Rodriguez , Sep.2020 . The specimens collected present the characteristics which are diagnostic of this species: polychromatic and polymorphic colouration pattern in males; gonopodial palp extending beyond gonopodium tip (figs. 19-20); absence of retrorse hook on tip of gonopodial ray 3a; presence of retrorse hook on tip of gonopodial ray 5; gonopodial ray 3 with series of ventral serrae; scales around caudal peduncle 14; and females with 9 anal-fin rays and 6-7 dorsalfin rays. Also, the conspicuous reticulate pattern along the females flank and the absence of a humeral blotch (following Poeser et al. 2005 ; Bragança et al. 2020 ).