Abstract
A new species of Oligoxystre, Oligoxystre diamantinensis n. sp., is described from Brazil. Male can be distinguished from all other Oligoxystre species by the male palpal bulb lacking a small subapical keel on the embolus in conjunction with the embolus length (less than 2.5 times the tegulum length) and by the tibial spur being inserted in a perpendicular angle in relation to the tibia axis. Female can be distinguished by the spermathecae being much more longer than wide, lacking lateral lobes anda large terminal lobe with five smaller lobes around it. Additionally, males and females can be distinguished by the general blue metallic color pattern contrasting with the reddish setae on the abdomen. A key for all described Oligoxystre species is presented. The cladistic relationship of O. diamantinensis sp. n. with the other Oligoxystre species is discussed and data on its habitat is provided.
Highlights
The genus Oligoxystre Vellard, 1924 comprises six species of small theraphosids recorded in Brazil and Bolivia
From Catalão, State of Goiás, Brazil based on a single male and several juveniles (Vellard 1924)
Specimens are deposited in the Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil (MZSP) and Instituto Butantan, São Paulo, Brazil (IBSP)
Summary
The genus Oligoxystre Vellard, 1924 comprises six species of small theraphosids recorded in Brazil and Bolivia. In a recent herpetological survey carried out in the city of Diamantina, State of Minas Gerais, Brazil, a new species of Oligoxystre was discovered and is described. Oligoxystre bolivianum, 1 male, Brazil, State of Mato Grosso, Chapada dos Guimarães 15°27’S 55°44’W, 19 March 1992, D.
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