Parthenogenesis confirmed for Tityus stigmurus

Luc Ross has published a study confirming parthenogenesis in the medical important species Tityus stigmurus (Thorell, 1876) (Buthidae). This is important knowledge as this species has large populations in urbanized areas in several regions in Brazil. T. stigmurus is considered among the three most toxic species in the genus and the presence of parthenogenetic populations allows rapid colonization, dispersion and population growth, making this an important factor in public health.

Abstract:
Parthenogenesis (asexuality) or reproduction of viable offspring without fertilization by a male gamete is confirmed for the medically significant, synanthropic scorpion Tityus (Tityus) stigmurus (Thorell, 1876) (Buthidae), based on the litters of four virgin females (62.3–64.6 mm) reared in isolation in the laboratory since birth. Mature females were capable of producing initial litters of 10–21 thelytokous offspring each; 93–117 days post-maturation. While Tityus stigmurus has been historically considered a parthenogenetic species in the pertinent literature, the present contribution is the first to demonstrate and confirm thelytokous parthenogenesis in this species.

Reference:
Ross LK. Confirmation of parthenogenesis in the medical significant, synthropic scorpion Tityus stigmurus (Thorell, 1876) (Scorpiones: Buthidae). Revista Iberica de Arachnologia. 2010;18:115-21.

Thanks to Luc Ross for sending me this paper!

Family Buthidae