Diacheila
Motschulsky, 1844
Diacheila is a of in the , Elaphrinae. The genus comprises at least four described , including one extinct species. Members are distributed across Holarctic regions, with some species restricted to Central Asia. The genus is notable for its and Subarctic specialization, particularly the well-studied D. polita, which exhibits -driven timing.
Pronunciation
How to pronounce Diacheila: /di.aˈkaɪ.la/
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Images
Habitat
Forest-tundra, southern tundra, and typical tundra bioclimatic zones in Subarctic and regions.
Distribution
Holarctic distribution: North Europe, West Siberia, Kazakhstan, Kyrgyzstan, and China. Records from Norway (NO) and Sweden (SE).
Seasonality
activity from late June to early September, with peak activity in August. Activity driven by rather than temperature.
Life Cycle
Obligate- late summer . Newly emerged and appear June to early July. Mature adults recorded from late June. present mid-July to early August in tundra zones. Maturation synchronized with daylight reduction to 17–15 hours (typical tundra) or 16–15 hours (forest-tundra and southern tundra).
Behavior
Seasonal activity depends on daylight duration, not temperature. Mature females show greater synchronization than males.