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O estudo de alguns escorpioes do genero Bothriurus, coletados na regiao de Grajau no estado do Maranhao, Brasil, permite identifica-los como uma especie proxima de Bothriurus rochai Mello-Leitao. Tomando-se em conta as diferencas existentes entre o meio-ambiente arido da Caatinga onde ocorre a forma tipica de Bothriurus rochai e aquele bem mais umido da regiao de Grajau, uma nova sub-especie geografica e proposta a presente. A descoberta dessa nova localidade para o genero Bothriurus e importante porque ela amplia a area de distribuicao do genero bem mais para oeste dessa regiao do Brasil, situando dessa maneira os Bothriuridae praticamente dentro da regiao Amazonica global definida por EITEN (1974). ABSTRACT The study of some scorpions belonging to the genus Bothriurus, collected in the region of Grajau in the state of Maranhao, Brazil, showed that they are, closely allied to the species Bothriurus rochai Mello- Leitao. Taking into account the environmental differences between the very arid « Caatinga » type formation inhabited by the typical form of Bothriurus rochai, and the rather humid conditions in the area of Grajau, a new geographical sub-species is proposed here. The discovery of this new locality for the genus Bothriurus is important because it represents a western extension of the range of distribution of the genus in this region of Brazil, thus placing the bothriurids within the global Amazonian region as defined by EITEN (1974). RESUME Letude de quelques scorpions appartenant au genre Bothriurus, collectes dans la region de Grajau dans lEtat du Maranhao au Bresil, a permis de les identifier comme une espece tres voisine de Bothriurus rochai Mello-Leitao. Compte tenu des differences existantes entre lenvironnement tres aride, type Caatinga, ou habite la forme typique de Bothriurus rochai, et celui bien plus humide de la region de Grajau, une nouvelle sous-espece geographique est proposee. La decouverte de cette nouvelle station pour le genre Bothriurus est importante car elle etend la repartition du genre beaucoup plus a lOuest dans cette region du Bresil, et place finalement les Bothriuridae pratiquement a linterieur de la region amazonienne globale au sens DEITEN (1974).

Sobre uma nova sub-espécie geográfica para Bothriurus rochai Mello-Leitão (Scorpiones, Bothriuridae)