First personal record of each species by Tadeo Cosso (lifers)
Species by Date 1 to 10 of 10
| Group | Species | Place | Date | Detail | |
 | Insectos | (Xyleus discoideus) | Gualeguay, Entre Ríos, Argentina | 01/01/2015 |  |
| | Insectos | (Calligrapha polyspila) | Gualeguay, Entre Ríos, Argentina | 12/31/2014 | |
| | Insectos | (Strymon eurytulus) | Gualeguay, Entre Ríos, Argentina | 12/28/2014 | |
| | Insectos | (Rutela lineola) | Gualeguay, Entre Ríos, Argentina | 12/08/2014 | |
| | Aves | Chalk-browed Mockingbird (Mimus saturninus) | Gualeguay, Entre Ríos, Argentina | 11/29/2014 | |
| | Anfibios | Argentine Toad (Rhinella arenarum) | Gualeguay, Entre Ríos, Argentina | 11/09/2014 | |
| | Insectos | (Paromoeocerus barbicornis) | Gualeguay, Entre Ríos, Argentina | 11/06/2014 | |
| | Insectos | (Xylocopa augusti) | Gualeguay, Entre Ríos, Argentina | 06/22/2014 | |
| | Reptiles | Yellow bellied Snake (Erythrolamprus poecilogyrus) | Gualeguay, Entre Ríos, Argentina | 05/03/2014 | |
| | Insectos | (Coryacris angustipennis) | Gualeguay, Entre Ríos, Argentina | 02/13/2014 | |
Species by Date 1 to 10 of 10