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1 August 2013 Meiotic studies in Brachistosternus alienus (Scorpiones; Bothriuridae)
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Brachistosternus Pocock 1893 is the most diverse genus of the scorpion family Bothriuridae. Only four species of the genus have been cytogenetically analyzed so far. We report herein the cytogenetic analysis of Brachistosternus alienus Lönnberg 1898 from Comallo (Río Negro province, Argentina). This species is widely distributed in the Monte phytogeographic province, located in central and northern Argentine Patagonia. Meiotic cells of B. alienus from Comallo show 23 homomorphic achiasmatic bivalents. The karyotype of this species contains scarce AT-rich regions that may be associated with the heterochromatin of centromeric regions. Giacomozzi (1977) reports n  =  14 for B. alienus from Chubut province. Unfortunately, it is not presently possible to determine if those specimens correspond to B. alienus or to a sympatric species, Brachistosternus angustimanus Ojanguren-Affilastro & Roig-Alsina 2001. These different chromosome numbers of the two populations analyzed may reflect the occurrence of a chromosomal polytypism in B. alienus, or they may characterize different species.

The American Arachnological Society
Renzo S. Adilardi, Andrés A Ojanguren-Affilastro, Sergio G. Rodríguez Gil, Cristina L. Scioscia, and Liliana M. Mola "Meiotic studies in Brachistosternus alienus (Scorpiones; Bothriuridae)," The Journal of Arachnology 41(2), 222-226, (1 August 2013).
Received: 11 September 2012; Published: 1 August 2013

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