The region of Belém is one of the best known area of the Amazon Forest, given its scientific explorations since the 18th century. However much of the informations about the biological diversity of the region is scattered at several museums around the world, thus making it harder to access and to propose biogeographical hypothesis.. Aiming to contribute to the knowledge of lepidopterological diversity of the region, the present study lists 225 species of Hesperiidae present at Private Natural Reserve Klagesi registered during approximately 24 years of sporadically collecting, although more frequently on the past decade. One hundred and thirteen species not yet registered in endemism's region of Belém are added, which makes it the richest of all Amazonian endemism areas in Brazil. However, the Amazonian skippers are so poorly known that this richness index can only be used for effort comparisons instead of biogeographical or ecological inferences. Three of the endemism regions still lack information about their diversity (Xingú, Napo and Imeri), while others are known basically from one or a few inventories. Therefore, focused sampling at those unknown areas or gathering information at international museums are indispensable strategies to obtain a better knowledge of Amazonian butterfly diversity so they can be used for biogeographical studies and conservation management.
inventory; distribution; skippers; Amazon Forest
