On the subspecies of <i>Gerris costae</i> (Herrich-Schaeffer, 1850) (Heteroptera, Gerromorpha: Gerridae) in Uzbekistan

Based on a new material, the boundaries of the ranges of Gerris costae fieberi Stichel and G. costae sahlbergi Distant in Uzbekistan have been clarified; the distribution area of the latter subspecies has been expanded to the west. A natural barrier has been identified that separates the ranges of the two subspecies. The ecological features of the habitats of these water striders are discussed. Data on the vertical distribution of the subspecies and their altitudinal limits are provided.

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