Cytogenetics of three species of Brachistosternus Pocock from Argentina (Scorpiones, Bothriuridae)

RODRÍGUEZ-GIL SERGIO GUSTAVO; OJANGUREN-AFFILASTRO ANDRÉS ALEJANDRO; BARRAL LEONEL; SCIOSCIA CRISTINA LUISA; MOLA LILIANA MARÍA

JOURNAL OF ARACHNOLOGY

Allen Press

Año: 2009 vol. 37 p. 331 - 337

0161-8202

Meiotic studies on three phylogenetically distant species of genus Brachistosternus Pocock from Argentina were carried out. Brachistosternus ferrugineus Thorell 1876, belonging to subgenus Ministernus Francke 1985 and two species of subgenus Leptosternus Maury 1973: B. montanus Roig-Alsina 1977 (of the Andean group of species) and two morphologically different populations of B. pentheri Mello-Leitão 1931 (of the plain group of species) were analysed. Brachistosternus ferrugineus, B. montanus, and one population of B. pentheri have 2n=46, n=23. The typical populations of B. pentheri have n=21. All the species showed achiasmatic meiosis, absence of heteromorphic bivalents, and bibrachial and monobrachial chromosomes of different sizes.