My name is Alejandro Serrano. I am a biologist (Nat. Univ. of San Juan and Nat. Univ. of Cuyo - Arg), formed as a plant physiologist but now turned into conservation biology. I am working in the El Impenetrable National Park (Chaco - Arg) and I am interested in knowing the biodiversity of arthropods and plants in that area. Since I am not a naturalist (yet?) I will suggest IDs only when I need some focused discussion and will appreciate any correction.