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The genus Dichopygina gen. n. (Diptera: Sciaridae)

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image of Insect Systematics & Evolution

The Northern Hemispheric sciarid species placed in the nigrohalteralis group of Corynoptera Winnertz are a monophyletic unit, which is described as a new genus Dichopygina gen. n. (type-species Bradysia (Chaetosciara) triseriata var nigrohalteralis Frey). The genus is Holarctic in distribution and includes the following species which are keyed and described: Dichopygina aculeata sp. n. (Holarctic), D. bernhardi sp. n. (Palaearctic), D. duplicis sp. n. (Nearctic), D. intermedia (Mohrig & Krivosheina) (Palaearctic), D. nigrohalteralis (Frey) (Holarctic), D. ramosa sp. n. (Palaearctic) and D. stricta sp. n. (Nearctic). Our previously published cladistic analysis suggests that the species now included in Dichopygina gen. n. are sister taxa to a large clade including the current Lycoriella Frey and elements of Corynoptera and Bradysia Winnertz. Corynoptera acanthostyla Tuomikoski and the New Zealand species referred to the Corynoptera nigrohalteralis group are excluded.


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