A new cryptic species of \u3ci\u3eAleochara\u3c/i\u3e Gravenhorst associated with \u3ci\u3eMarmota monax\u3c/i\u3e (Linnaeus) burrows and caves in North America (Coleoptera: Staphylinidae: Aleocharinae)

A new cryptic species, Aleochara (Xenochara) castaneimarmotae Klimaszewski, Webster, and Brunke, new species (Coleoptera: Staphylinidae: Aleocharinae), associated with Marmota monax (Linnaeus) burrows and caves in eastern North America, is described and illustrated. A key to Canadian species of subgenus Xenochara Mulsant and Rey and revised distributions of the taxonomically difficult fumata species group are provided. Aleochara quadrata Sharp is recorded from Washington and Oregon for the first time

A world generic revision of Quediini (Coleoptera, Staphylinidae, Staphylininae), part 1. Early diverging Nearctic lineages

Several phylogenetically isolated, early diverging lineages of rove beetle tribe Quediini, all endemic to the western Nearctic, have recently been revealed by phylogenomic systematics. These three lineages, currently treated as either Quedius (Raphirus) or Q. (Paraquedius) warrant recognition at the genus level in the ongoing effort to achieve reciprocal monophyly of genera in Quediini. The three lineages were each morphologically studied in detail, with the following results: Paraquedius Casey, stat. res. is re-elevated to genus rank, Quediellus Casey, stat. res. is resurrected from synonymy and redefined, and Iratiquedius gen. nov. is described for the species of the Amabilis and Prostans groups. A morphological diagnosis is provided for each genus at both the global and regional (Nearctic) level. Species level revisions, with keys, are provided for Iratiquedius, Paraquedius, and Quediellus with the following results: Iratiquedius uncifer sp. nov. and Paraquedius marginicollis sp. nov. are described, Quediellus nanulus Casey is treated as syn. nov. of Quediellus debilis (Horn), and I. amabilis (Smetana), I. mutator (Smetana), and P. puncticeps (Horn) are substantially redefined. Where possible, CO1 barcode sequence data are integrated with the morphological species concepts used herein and their clusters were found to be congruent

Dispersal of thermophilic beetles across the intercontinental Arctic forest belt during the early Eocene

Abstract Massive biotic change occurred during the Eocene as the climate shifted from warm and equable to seasonal and latitudinally stratified. Mild winter temperatures across Arctic intercontinental land bridges permitted dispersal of frost-intolerant groups until the Eocene-Oligocene boundary, while trans-Arctic dispersal in thermophilic groups may have been limited to the early Eocene, especially during short-lived hyperthermals. Some of these lineages are now disjunct between continents of the northern hemisphere. Although Eocene climate change may have been one of the most important drivers of these ancient patterns in modern animal and plant distributions, its particular events are rarely implicated or correlated with group-specific climatic requirements. Here we explored the climatic and geological drivers of a particularly striking Neotropical-Oriental disjunct distribution in the rove beetle Bolitogyrus, a suspected Eocene relict. We integrated evidence from Eocene fossils, distributional and climate data, paleoclimate, paleogeography, and phylogenetic divergence dating to show that intercontinental dispersal of Bolitogyrus ceased in the early Eocene, consistent with the termination of conditions required by thermophilic lineages. These results provide new insight into the poorly known and short-lived Arctic forest community of the Early Eocene and its surviving lineages

Coleoptera of Canada

The beetle fauna of Canada was assessed, including estimates of yet unreported diversity using information from taxonomists and COI sequence clusters in a BOLD (Barcode of Life Datasystems) COI dataset comprising over 77,000 Canadian records. To date, 8302 species of Coleoptera have been recorded in Canada, a 23% increase from the first assessment in 1979. A total of 639 non-native beetle species have become established in Canada, with most species in the Staphylinidae (153 spp.), Curculionidae (107 spp.), Chrysomelidae (56 spp.) and Carabidae (55 spp.). Based on estimates from the taxonomic community and our BOLD dataset, we estimate that slightly more than 1000 beetle species remain to be reported from Canada, either as new records or undescribed species. Renewed enthusiasm toward and financial support for surveys, especially in the central and western provinces of Canada will be critical for detecting, documenting and describing these species. The Barcode of Life database is still far from comprehensive for Canadian Coleoptera but substantial progress has been made and the number of Barcode Index Numbers (BINs) (as candidate species) has reached nearly 70% of the number of species reported from Canada. Comparison of BINs to observed species in a group of Canadian Staphylinidae suggests that BINs may provide a good estimate of species diversity within the beetles. Histeridae is a diverse family in Canada that is notably underrepresented in BOLD. Families such as Mordellidae, Scraptiidae, Latridiidae, Ptiliidae and Scirtidae are poorly known taxonomically in Canada and are represented in our BOLD dataset by many more BINs than recorded species

New relictual genera in Cyrtoquediini and Indoquediini (Coleoptera: Staphylinidae: Staphylininae)

Sundaquedius gen. nov. (Cyrtoquediini) and Fluviphirus gen. nov. (Indoquediini) are described from southeast Asia and western North America, respectively, resulting in the new combinations Sundaquedius nigropolitus (Cameron) and Fluviphirus elevatus (Hatch). Sundaquedius abbreviatus sp. nov. is described from Vietnam. The phylogenetic positions of these genera within Staphylininae are supported by morphology and recently published phylogenomic evidence. New keys to the world genera of Cyrtoquediini and Indoquediini are provided. A new country record for Alesiella lineipennis (Cameron) is provided for Thailand, based on the first available specimen in more than 100 years

A revision of the Oriental species of Bolitogyrus Chevrolat (Coleoptera, Staphylinidae, Staphylininae)

The Oriental species of the relictual genus Bolitogyrus are revised based on 200 specimens. An updated description of the genus is provided, including additional putative synapomorphies. Fifty valid Oriental species are diagnosed herein and the following nineteen are described as new to science: B. concavus sp. n.; B. confusus sp. n.; B. himalayicus sp. n.; B. khasiensis sp. n.; B. luteus sp. n.; B. mulayitensis sp. n.; B. nanus sp. n.; B. nokrek sp. n.; B. pecki sp. n.; B. pederseni sp. n.; B. phukhieo sp. n.; B. rougemonti sp. n.; B. sepilok sp. n.; B. schillhammeri sp. n.; B. smetanai sp. n.; B. solodovnikovi sp. n.; B. temburong sp. n.; B. tigris sp. n.; and B. tumidus sp. n. The following synonymies are proposed: Cyrtothorax borneensis Cameron, 1942, syn. n. = Cyrtothorax caesareus Bernhauer, 1915; Cyrtothorax octomaculatus Cameron, 1937 syn. n. = Quedius ornatipennis Wendeler, 1927. Quedius (Raphirus) ornatipennis is moved to Bolitogyrus as B. ornatipennis (Wendeler), comb. n. A lectotype is designated for Cyrtothorax rufipennis Cameron, 1937. Several species are named in recognition of conservation efforts to protect tropical primary forests in Asia that are important to the survival of many Bolitogyrus species. All available bionomic and distributional data for Oriental Bolitogyrus are summarized, and an identification key is provided

Revision of rove beetle genus Bolitogyrus Chevrolat (Staphylininae, Cyrtoquediini). Supplement 1

Bolitogyrus is a moderately diverse genus of 78 species that are widely disjunct in the subtropical and tropical forests of the Neotropical and Oriental regions. Following recent revisions of both the Neotropical and Oriental species, this study provides new distributional data, a revised species concept for Bolitogyrus strigifrons (Wendeler) sensu nov., and the description of B. pseudostrigifrons sp. nov. and B. nigropolitoides sp. nov., bringing the total number of Bolitogyrus species to 80. Several keys are updated to reflect the newly available data and new species

First detection of the adventive large rove beetle Ocypus nitens (Schrank) in Canada and an update of its Nearctic distribution using data generated by the public

The adventive rove beetle Ocypus nitens (Staphylinidae: Staphylininae) is newly recorded in Canada (Ontario) and the state of Vermont, and additional range expansion is documented. The updated distribution of this large, conspicuous species is based mostly on data from digital photographs posted by users of the online community BugGuide. All available data are summarized and made available as a DarwinCore dataset, and an updated distribution map is provided. Citizen-generated distributional data continues to be a valuable ally in the detection of adventive insects and the study of their distributional dynamics

A new cryptic species of \u3ci\u3eAleochara\u3c/i\u3e Gravenhorst associated with \u3ci\u3eMarmota monax\u3c/i\u3e (Linnaeus) burrows and caves in North America (Coleoptera: Staphylinidae: Aleocharinae)

A new cryptic species, Aleochara (Xenochara) castaneimarmotae Klimaszewski, Webster, and Brunke, new species (Coleoptera: Staphylinidae: Aleocharinae), associated with Marmota monax (Linnaeus) burrows and caves in eastern North America, is described and illustrated. A key to Canadian species of subgenus Xenochara Mulsant and Rey and revised distributions of the taxonomically difficult fumata species group are provided. Aleochara quadrata Sharp is recorded from Washington and Oregon for the first time

Quedius (Raphirus) muscicola Cameron 1932

Quedius (Raphirus) muscicola Cameron, 1932 Fig. 3B Quedius (Raphirus) muscicola Cameron, 1932: 295. Quedius (Raphirus) dohertyi Cameron, 1932: 297 (synonymized by Smetana (1988)). Quedius (Raphirus) heterogaster Cameron, 1944: 14 (synonymized by Smetana (1988)). Quedius (Raphirus) kambaitiensis Scheerpeltz, 1965: 287 syn. nov. Diagnosis Among members of the Muscicola group in the Oriental region, Quedius muscicola may be distinguished by a combination of: pronotum no more than moderately narrowed anteriad; elytra with fine and dense punctation; legs entirely pale; abdominal tergites with sparsely punctate to impunctate areas at middle of apical half; tergite VII with palisade fringe; median lobe in ventral view with arcuate, broadly rounded apex. A dorsal habitus is given in Fig. 3B.Published as part of Brunke, Adam James, 2023, Review of Quedius (Coleoptera, Staphylinidae) described from the 1934 expedition by R. Malaise to Myanmar, pp. 117-145 in European Journal of Taxonomy 864 on page 140, DOI: 10.5852/ejt.2023.864.2093, http://zenodo.org/record/787217