02237nas a2200253 4500008004100000022001400041245006600055210006300121260000800184300001200192490000600204520157300210653001701783653001201800653001701812653001001829653001201839653001301851653000901864100002601873700001601899700002501915856004301940 2021 eng d a1314-282800aRevision of the Exechia parva group (Diptera: Mycetophilidae)0 aRevision of the Exechia parva group Diptera Mycetophilidae csep a1–1220 v93 a

Exechia is a diverse genus of small fungus gnats, widespread in the Holarctic Region, while the fauna is largely unknown elsewhere, such as in the Afrotropical and Oriental Region. Members of Exechia can be arranged into several species groups, based on homologies in the male and female terminalia. The Exechia parva group is delimited, based on male terminalia possessing a pair of gonocoxal lobes on the apicoventral gonocoxal margin. Eight previously-described species can be placed in this group, of which six are from the Holarctic Region, while one is recorded each from the Oriental and the Afrotropical Regions.

 

The Exechia parva group was reviewed and found to include 33 species, of which 24 were described as new to science and six were re-described. Identification keys to 32 species for males and nine species for females are provided together with illustrations and photos of male and female terminalia. Species delimitations were based on morphological examination of 94 male and female specimens, as well as DNA barcodes obtained from 124 specimens. Molecular and morphological species delimitations were mostly congruent, except in two cases where two species were delimited within a single Barcode Index Number (BIN). We found that each species is only known from a single zoogeographical region and that several species complexes are largely congruent with zoogeographical divisions, indicating that intercontinental barriers may have a strong impact on the species diversity of the group.

10aDNA barcodes10aExechia10afungus gnats10aparva10arepanda10ataxonomy10a_pdf1 aLindemann, Jon, Peder1 aSøli, Geir1 aKjærandsen, Jostein uhttps://bdj.pensoft.net/article/67134/01637nas a2200229 4500008004100000022001400041245009500055210006900150260001200219300001100231490000600242520096800248653001601216653001601232653001701248653002101265653001301286100001901299700001901318700002201337856004801359 2016 eng d a1314-282800aNew and poorly known Holarctic species of Boletina Staeger, 1840 (Diptera, Mycetophilidae)0 aNew and poorly known Holarctic species of Boletina Staeger 1840  c01/2016 a1–280 v43 a

The genus Boletina is a species rich group of fungus gnats. Members of the genus are mainly known from temperate, boreal and arctic biomes. Phylogeny of the genus is still poorly resolved, dozens of species are insufficiently described and undescribed species are often discovered, especially from samples taken from the boreal zone. Four new species are described. Boletina valteri Salmela sp.n. (Finland), Boletina kullervoi Salmela sp.n. (Finland), B. hyperborea Salmela sp.n. (Finland, Norway, Sweden, Canada) and B. nuortti Salmela sp.n. (Finland). Boletina arctica Holmgren is redescribed and reported for the first time from the Canadian high arctic zone. Boletina borealis Zetterstedt and B. birulai Lundström are reported for the first time from Canada. Boletina subnitidula Sasakawa (syn. n.) is proposed as a junior synonym of B. pallidula Edwards.

10aarctic zone10aBoreal zone10afungus gnats10aspecies richness10ataxonomy1 aSalmela, Jukka1 aSuuronen, Anna1 aKaunisto, Kari, M uhttp://bdj.pensoft.net/articles.php?id=7218