Requested reference
Utochkin, A. S. (1981). [Contribution to the systematics of the spider genus Tibellus in the fauna of the USSR]. In: Fauna and ecology of insects. University of Perm, pp. 8-20. 
-- Show included taxa
Utochkin, A. S. (1981). [Contribution to the systematics of the spider genus Tibellus in the fauna of the USSR]. In: Fauna and ecology of insects. University of Perm, pp. 8-20. -- Show included taxa