A new species of the genus Dorytomus Germar, 1817 (Coleoptera, Curculionidae) from Rovno amber

A new species, Dorytomus mikhailovi sp. n., from late Eocene Rovno amber is described and illustrated. The new species is similar to D. groehni Bukejs et Legalov, 2019 from Baltic amber but differs in the shorter rostrum, dorsum covered with denser decumbent hairs and erect to semierect scale-like setae, and smaller body sizes. It is distinguished from D. bukejsi Legalov, 2020 from Baltic amber by the densely punctate pronotum, longer rostrum and wide elytral interstriae. The new species differs from D. vlaskini Legalov et al., 2019 from Rovno amber by the elytral interstriae covered with decumbent hairs and erect to semierect scale-like setae, shorter rostrum and coarsely punctuate pronotum. It is the first named curculionid beetle from the Olevsk amber locality, and the eleventh amber species reported from the Zhitomyr region. The presence of seven species of Dorytomus suggests a rather high diversity of Salicaceae in the late Eocene amber forests of Europe. It corresponds well with other principal Holarctic species in European amber biotas.

Integrative taxonomy of Nearctic and Palaearctic Aleocharinae: new species, synonymies, and records (Coleoptera, Staphylinidae)

A long tradition of separate Nearctic and Palaearctic taxonomic studies of the diverse aleocharine rove beetles (Coleoptera: Staphylinidae) has obscured the recognition of Holarctic species and detection of adventive species in both regions. Recently, integrated study of the two regions through detailed morphological comparisons and development of an authoritatively identified DNA barcode reference library has revealed the degree to which these two aleocharine faunas are interconnected, both naturally and through human activity. Here this approach is adopted to recognize new species, reveal Holarctic species, and recognize adventive species in both North America and Europe. The following new species are described: Isoglossa triangularis Klimaszewski, Brunke & Pentinsaari, sp. nov. from British Columbia; Gnypeta impressicollis Klimaszewski, Brunke & Pentinsaari, sp. nov., from Ontario, Maryland and North Carolina; Aloconota pseudogregaria Klimaszewski, Brunke & Pentinsaari, sp. nov., from Ontario and Virginia; and Philhygra pseudolaevicollis Klimaszewski, Brunke & Pentinsaari, sp. nov. from eastern Canada. Dasygnypeta velata and Philhygra angusticauda are revealed to be Holarctic species, resulting in the following synonymies: Dasygnypeta velata (Erichson, 1839) = Gnypeta minuta Klimaszewski & Webster, 2008, syn. nov. and Philhygra angusticauda (Bernhauer, 1909) = Atheta (Philhygra) pinegensis Muona, 1983, syn. nov. The Nearctic species Hylota ochracea (and genus Hylota), Thecturota tenuissima, and Trichiusa robustula are newly reported from the Palaearctic region as adventive, resulting in the following synonymies: Hylota ochracea Casey, 1906 = Stichoglossa (Dexiogyia) forticornis Strand, 1939, syn. nov.; Thecturota tenuissima Casey, 1893 = Atheta marchii Dodero, 1922, syn. nov.; and Trichiusa robustula Casey, 1893 = T. immigrata Lohse, 1984, syn. nov. The Palaearctic species Amarochara forticornis, Anomognathus cuspidatus, Oligota pumilio, and Parocyusa rubicunda are newly confirmed from the Nearctic region as adventive, resulting in the following synonymies: Parocyusa rubicunda (Erichson, 1837) = Chilopora americana Casey, 1906, syn. nov. and Anomognathus cuspidatus (Erichson, 1839) = Thectura americana Casey, 1893, syn. nov. The genus Dasygnypeta, sensu nov. is newly reported from North America, Paradilacra is newly reported from eastern North America, and Haploglossa is newly reported from Canada, resulting in the following synonymy: Paradilacra densissima (Bernhauer, 1909) = Gnypeta saccharina Klimaszewski & Webster, 2008, syn. nov. Native Cyphea wallisi is newly reported from across Canada and C. curtula is removed from the Nearctic fauna. The status of both Gyrophaena affinis and Homalota plana is uncertain but these species are no longer considered to be adventive in North America. Three new combinations are proposed: Dasygnypeta baranowskii (Klimaszewski, 2020) and D. nigrella (LeConte, 1863) (both from Gnypeta) and Mocyta scopula (Casey, 1893) (from Acrotona). Dolosota Casey, 1910, syn. nov. (type species Eurypronota scopula Casey), currently a subgenus of Acrotona, is therefore synonymized with Mocyta Mulsant & Rey, 1874. Additionally, four new Canadian records and 18 new provincial and state records are reported.

A taxonomic revision of the genus Linycus Cameron, 1903 from Japan

The Japanese species of the genus Linycus Cameron are examined with two species recognized. A Holarctic species, L. exhortator (Fabricius) is newly collected from Japan [Hokkaido, Honshû, Shikoku, Kyûshû], and a new species, L. kyoheii sp. nov., is described from Yamanshi Pref., Honshû. The two Japanese species can be distinguished by a white spot on scutellum (present in L. kyoheii vs. absent in L. exhorator), and sculpture of area between gastrocoeli (weakly rugose-punctate in L. kyoheii vs. clearly rugose in L. exhortator). We also compared the Cytochrome c oxidase subunit I (CO1) of Japanese L. exhortator with European L. exhortator. The p-distances between Japanese and European subspecies exhortator were about 2%, whereas between Japanese and Nearctic ssp. thoracius (Cresson) were about 5%. Here we provisionally treat Japanese L. exhorator as nominotypical subspecies. The intra-specific DNA barcode divergence and allopatric color variations are discussed.

First record of Platypsyllus castoris Ritsema, 1869 (Coleoptera: Leiodidae) from Siberia

Holarctic species Platypsyllus castoris Ritsema, 1869 previously noted in Palaearctic only Europe and European part of Russia is found in Siberia (Russia, Altai Krai) for the first time. This species was collected on Eurasian beaver (Castor fiber Linnaeus, 1758).

To the study of hemipteran assemblages (Insecta: Heteroptera) of aquatic and near-aquatic biotopes of the Meshchera National Park

This paper presents the results of a study of hemipteran assemblages in aquatic and semiaquatic biotopes of the Meshchera National Park. The insect fauna, which includes 80 species of 21 families, includes eurytopic species, polyphytophages, and broad oligophytophages, inhabiting biotopes with an herbaceous cover and a wide range of humidity. The fauna is mainly represented by Trans-Palearctic, Superatlantic and Holarctic species. The greatest faunistic similarity is characteristic of hemipteran associations of floodplain meadows with areas of sedge-forb shores (ICS = 29.1%) and sedge shores (I CS = 21.4%); in addition, the hemipteran assemblages of rivers and ditches are very similar (ICS = 14.8%).

A new species of Pima Hulst, 1888 from China (Lepidoptera, Pyralidae, Phycitinae), with a key to Holarctic species

Pima tristriatasp. nov. is described as new to science based on specimens collected from the Ningxia Hui Autonomous Region, China, and P. boisduvaliella (Guenée, 1845) is also treated here for comparison. DNA barcodes of the two species are provided, together with a neighbor-joining tree for species delimitation. A key to the Holarctic species and a distribution map of the Chinese species are presented.

A review of the genera Georthocladius Strenzke, 1941 and Parachaetocladius Wülker, 1959 (Chironomidae, Orthocladiinae): new species descriptions, and keys based on the morphological characters of adult male

A systematic revision of the genera Georthocladius Strenzke, 1941 and Parachaetocladius Wülker, 1959, and a key to adult males is presented. Two new Holarctic species are diagnosed and described based on morphological characters of the adult male: Parachaetocladius pyrenaeus sp. n. (Palaearctic region) and Parachaetocladius broankerothurrie sp. n. (Nearctic region). Additional taxonomic notes on related genera of Orthocladiinae and synonymies for four species from Japan are also provided, which include: Parachaetocladius kuramasingularis (Sasa, 1989), Parachaetocladius kamiovatus (Sasa & Hirabayashi, 1993), and Parachaetocladius sunabaabeus (Tanaka & Sasa, 2001) being the junior synonyms of Parachaetocladius akanoctavus Sasa & Kamimura, 1987. An updated checklist of both Georthocladius and Parachaetocladius species with taxonomic remarks, ecology, discussions and a provisional key for adult male are also provided.

Pagastia (P.) donoliveri sp. nov.—a new Nearctic alpine stream chironomid species (Diptera: Chironomidae: Diamesinae) from the Beartooth Mountains, Wyoming, U.S.A.

An illustrated description of the adult male of Pagastia (P.) donoliveri sp. nov. from the Beartooth Mountains, Wyoming, of North America is provided. An updated key to the determination of all known Holarctic species of Pagastia Oliver for males is also provided.