The genus Brachistosternus (Scorpiones: Bothriuridae) in Chile, with Descriptions of Two New Species Author OJANGUREN AFFILASTRO, ANDRÉS A. Author MATTONI, CAMILO I. Author PRENDINI, LORENZO text American Museum Novitates 2007 2007-05-16 3564 1 1 44 http://www.bioone.org/perlserv/?request=get-abstract&doi=10.1206%2F0003-0082(2007)517%5B1%3ATGBSBI%5D2.0.CO%3B2 journal article 10.1206/0003-0082(2007)517[1:TGBSBI]2.0.CO;2 0003-0082 5387668 Brachistosternus ( L. ) sp. 2 figures 44 , 55 , 76 MATERIAL EXAMINED: CHILE : Region V ( Valparaiso ): Los Andes Province : between Río Blanco and Juncal [ 32 ° 54 9 S 70 ° 11 9 W ], 6.i.1984 , A. Roig Alsina , 1950 m , 13 (MACN-Ar 10767); Guardia Vieja [ 32 ° 54 9 S 70 ° 17 9 W ], 19.i.1984 , E. Maury , 1600 m , 1♀ , 1 juv. (MACN-Ar 10768); Juncal [ 32 ° 52 9 S 70 ° 10 9 W ], 5.i.1984 , E. Maury , 1950 m , 3♀ , 3 juv. (MACN-Ar 10769); 20 km from Portezuelo [ 32 ° 53 9 S 70 ° 13 9 W ], 13.ii.2005 , Ojanguren and Korob , 2100 m , 1 juv. (MACN-Ar 10770) . DIAGNOSIS: Brachistosternus sp. 2 is closely related to B. chilensis . Both species possess similar hemispermatophores, in which the distal lamina is shorter than or equal to the basal portion, the internal spines are absent, the basal spines well developed, the row of spines unbranched, and the basal triangle medium-sized. The pigmentation pattern of the tergites is also similar, displaying two welldeveloped spots laterally and a small spot medially that is often absent. Telson glands are absent in both species. The two species may be separated by means of pigmentation pattern. In B. chilensis , the VM stripe on metasomal segments I–IV is narrow and does not join the VL stripes ( fig. 56 ), whereas in Brachistosternus sp. 2 , it is broad and joins the VL stripes ( fig. 55 ). Additionally, B. chilensis exhibits a well-developed VM carina on metasomal segment V, which is absent in Brachistosternus sp. 2 ( fig. 44 ). DISTRIBUTION: Brachistosternus sp. 2 is the southernmost Andean species in Chile . It has been collected at intermediate altitudes ( 1600– 2100 m ) in the central Andes of the Valparaiso region ( fig. 76 ). These localities belong to the Andes Mediterraneos botanical subregion, of the Estepa altoandina botanical region ( Gajardo, 1993 ) . NOTES: A description of this species is in preparation by the first author and Cristina Scioscia.