02398nas a2200337 4500008004100000245006000041210005700101300001300158490000700171520152000178653001201698653001701710653001601727653001701743653001201760653001201772653001001784653000901794653001901803653001301822653000901835653001301844653000901857100001901866700001801885700002001903700001701923700002201940700001501962856008301977 2021 eng d00aRevision of Finnish Chaoboridae (Diptera, Culicomorpha)0 aRevision of Finnish Chaoboridae Diptera Culicomorpha a67–1270 v683 a

The 11 Finnish species of phantom midges (Chaoboridae) are revised. The study included nationwide field sampling, targeted investigations, DNA barcoding, examination of museum specimens and an extensive literature survey. The regional fauna now consists of all European taxa, with Mochlonyx triangularis Klink reported here for the first time from Fennoscandia. An illustrated key is provided to fourth instar larvae, pupae and adult males of all species. Chaoborus flavicans (Meigen) is noted as the only truly lake-dwelling species, whilst Ch. albipes (Johannsen) may also occasionally be present in ponds that contain fish populations, all other species are deemed inhabitants of fishless ponds. Among the pond-dwelling species, Ch. obscuripes (Van der Wulp) is dominant, both in terms of numbers of ponds and abundance. The number of chaoborid species in a given pond varies from one to six, with 1–2 taxa found universally. The number of Chaoborus species is most often from one to two and the presence of ≥3 Chaoborus species in a pond is quite rare. Reasons for the observed patterns are likely caused by niche differences, biotic interactions, depth and pond permanence. A total of 251 journal articles, reports or academic theses were found to include records on Finnish Chaoboridae. Chaoborus flavicans was the most often cited taxon (74 % of the studies), whilst the pond-dwelling species (20 %) were cited far more rarely.

10aaquatic10abiodiversity10aChaoboridae10aCulicomorpha10adiptera10aFinland10aflies10alake10aphantom midges10aplankton10apond10apredator10atrue1 aSalmela, Jukka1 aAhola, Janika1 aHärmä, Oskari1 aLaine, Erkka1 aPaasivirta, Lauri1 aRinne, Aki uhttp://www.entomologi.no/journals/nje/2021-1/pdf/nje-vol68-no1-2021-67-127.pdf01927nas a2200193 4500008004100000245011300041210006900154300001400223490000900237520131000246653001801556653002101574653001901595653001301614100001901627700002001646700002101666856004601687 2021 eng d00aChaoborus flavicans Meigen (Diptera, Chaoboridae) is a complex of lake and pond dwelling species: a revision0 aChaoborus flavicans Meigen Diptera Chaoboridae is a complex of l a151–1960 v49273 a

Chaoborus flavicans (Meigen) is a widespread and much studied lacustrine phantom midge. As larvae, these insects are important aquatic predators. Based on the available type material, morphology of immature stages and adults, their aquatic habitat, and DNA barcodes, C. flavicans is shown to be a composite of at least four species, with three of these named here. Chaoborus flavicans is primarily a lake-dwelling species with a Holarctic range. Chaoborus albipes (Johannsen, 1903 stat. rev.) and C. posio Salmela sp. n. are pond-dwelling Holarctic and north European species, respectively. The position of the larval subordinate mandibular tooth at the vertex of the second and fourth teeth is a synapomorphy of the Chaoborus flavicans species complex. We present an identification key to fourth instar larvae, pupae, and adult males. We also designate the lectotype and paralectotypes of Sayomyia rotundifolia Felt, 1904 (syn. nov. of C. albipes). We hypothesize that a fourth species of the species complex is present in Japan. Our revision indicates that Holarctic shallow ponds contain a hidden diversity of predators (C. albipes and C. posio sp. n.).

10aDNA barcoding10aHolarctic region10aphantom midges10ataxonomy1 aSalmela, Jukka1 aHärmä, Oskari1 aTaylor, Derek, J uhttps://doi.org/10.11646/zootaxa.4927.2.1