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We establish new subjective synonyms for five Drunella species from the Nearctic, east Palearctic, and Oriental regions: Drunella cryptomeria (Imanishi, 1937) [=Ephemerella nM Imanishi, 1940, new synonym; = D. lepnevae (Tshernova, 1949), new synonym; = D. longipes (Tshernova, 1952), new synonym; = D. fusongensis Su and Gui, 1995, new synonym], D. ishiyamana Matsumura, 1931 [= E. latipes Tshernova, 1952, new synonym], D. lata (Morgan, 1911) [= D. cornuta (Morgan, 1911), new synonym, = E. depressa Ide, 1930, new synonym, = D. cornutella (McDunnough, 1931), new synonym, = D. longicornis (Traver, 1932), new synonym], D. submontana (Brodsky, 1930) [= E. svenhedini Ulmer, 1936, new synonym], and D. walkeri (Eaton, 1884) [= D. wayah (Traver, 1932), new synonym]. Morphology, phenotypic plasticity, and biology are discussed for these species and for D. allegheniensis and D. tuberculata, and new diagnoses are provided. The specific epithet of D. doddsii is corrected to its original orthography.
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Jacobus et al. (2004) studied this question.
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