A Dataset of Pipunculidae and Psilidae (Diptera) in Some Regions of European Russia

This dataset presents results of a study on Pipunculidae and Psilidae (Diptera) conducted in 2018–2024 across eight regions of European Russia. A total of 87 localities were surveyed. In total, 1358 specimens were reliably identified, including 1122 Pipunculidae and 236 Psilidae, representing 102 species (79 and 23 species, respectively). Of these, 397 specimens were females (29.2%). For most of the studied regions, all recorded species represent new records for their faunas. In the Republic of Mordovia, 68 species of Pipunculidae and 18 species of Psilidae are reported as new to the regional fauna. These data supplement previously published species lists for these families. Dorylomorpha clavipes and Dorylomorpha sachalinensis are recorded for the first time in the European part of Russia and in Europe as a whole. Previously, Dorylomorpha clavipes had been reported only from the southern Russian Far East, while Dorylomorpha sachalinensis was known exclusively from Sakhalin Island. The highest abundance among the examined material was observed for four species: Tomosvaryella minuscula (Pipunculidae)—288 specimens; Tomosvaryella sylvatica (Pipunculidae)—216; Dasydorylas holosericeus (Pipunculidae)—116; and Chamaepsila nigricornis (Psilidae)—102. Yellow pan traps were used at 69 localities and yielded 63 species and 590 specimens. Malaise traps were deployed at 11 localities and yielded 72 species based on 721 specimens. The highest species richness and specimen abundance were recorded in edge habitats of pine forests and in forest glades along lake shores.