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

A new apterous rove beetle genus (Coleoptera: Staphylinidae) from the Northern Andes with an assessment of its phylogenetic position

A remarkable new apterous genus of Xanthopygina beetles is described here as Ikaros gen. nov. The new genus includes three new species, I. apteros gen. et sp. nov. from Colombia, I. paramo gen. et sp. nov. from Colombia and I. polygonos gen. et sp. nov. from Venezuela. Phylogenetic analyses using molecular and morphological data were performed to assess the phylogenetic position of Ikaros gen. nov. and whether the three new taxa formed a monophyletic group. All analyses, including those with aptery-associated characters removed, strongly supported the monophyly of Ikaros gen. nov. The genus could not be confidently resolved as a member of any of the existing genus-group lineages, likely due to a lack of morphological signal in the backbone of the tree. Further analyses, ideally with molecular data, are needed to determine the position of Ikaros gen. nov

Ikaros polygonos Chatzimanolis & Brunke 2021, gen. et sp. nov.

<i>Ikaros polygonos</i> gen. et sp. nov. <p>urn:lsid:zoobank.org:act: D7581C8A-2D3A-4D1A-977B-F82E03BD07A7</p> <p>Figs 2C, 5</p> Diagnosis <p> <i>Ikaros polygonos</i> gen. et sp. nov. can be distinguished from other species in this genus by the presence of an arch-like carina on terga 3–5 (absent in the other two species); the stark polygon-shaped microsculpture on the dorsal surface of the head, thorax and elytra (absent in the other two species) and the long crownlike macrosetae (macrosetae at least twice as long as antennomeres) on the antennomeres (macrosetae much smaller in the other two species).</p> Etymology <p>The specific epithet is derived from the Greek word ‘πολύγωνος’ (‘polygon’) and refers to the stark polygon-shaped microsculpture of the head, thorax and elytra. It is treated here as a noun in apposition.</p> Type material <p> <b>Holotype</b> (here designated) VENEZUELA • ♂; “ Venezuela, Merida, Tabay, 7 km E. La Mucuy Station, Sierra Nevada Natl. Park, 2300–2700 m, 8°37′44″N 71°2′26″W, 24.v.1998, R. Anderson, VEN1A98 036B. ex: upper montane forest litter / SM0114364 [barcode label] / HOLOTYPE <i>Ikaros polygonos</i> Chatzimanolis and Brunke, des. Chatzimanolis and Brunke 2020”; MIZA.</p> Description <p> Forebody length 5.2 mm long. Coloration of body reddish brown, with head and pronotum having undertones of metallic green-brown. Head transverse, HW/HL ratio = 1.16. Epicranium with numerous large punctures, except impunctate centre; punctures not contiguous, distance between punctures typically width of 1–2 punctures; with stark polygon-shaped microsculpture. Labial palpus with palpomere 3 widest before apex. Antennomeres with crown-like macrosetae at least twice as long as antennomeres. Pronotum longer than wide, PW/PL ratio = 0.9; surface of pronotum with a median impunctate area as wide as 2–3 punctures; with 4–5 rows of punctures in addition to rows flanking impunctate centre; with stark polygon-shaped microsculpture. Elytra shorter than pronotum, EL/PL ratio = 0.8. Elytra with large, deep contiguous punctures and dense polygon-shaped microsculpture. Abdominal terga 3–5 with archlike carina. Male secondary sexual structures with shallow emargination on sternum 7; with shadow, small U-shaped emargination on sternum 8; borders of emargination on sternum 7 and 8 appearing ‘shaved’ (with no setae), but less so than in <i>I. apteros</i> gen. et sp. nov. Aedeagus as in Fig. 5; in dorsal view paramere slightly longer than median lobe; paramere broad, converging to broad, rounded tip; in lateral view paramere narrower apically. Median lobe in dorsal view becoming narrow to small apex; in lateral view median lobe concave, becoming narrower near curved apex, without subapical tooth.</p> Distribution <p>Known only from the type locality in Sierra Nevada National Park in Venezuela (Fig. 6).</p> Remarks <p>The holotype is currently in the collection of SEMC but due to the collecting permit requirements (R. Anderson pers. com.), it will be transferred to the MIZA collection in the near future.</p>Published as part of <i>Chatzimanolis, Stylianos & Brunke, Adam J., 2021, A new apterous rove beetle genus (Coleoptera: Staphylinidae) from the Northern Andes with an assessment of its phylogenetic position, pp. 67-82 in European Journal of Taxonomy 744</i> on pages 77-78, DOI: 10.5852/ejt.2021.744.1303, <a href="http://zenodo.org/record/4673914">http://zenodo.org/record/4673914</a&gt

A revision of Haematodes Laporte and Weiserianum Bernhauer (Coleoptera: Staphylinidae: Staphylininae: Xanthopygina)

The species of poorly known but charismatic genera Haematodes Laporte, 1835 and Weiserianum Bernhauer, 1927 are revised. Weiserianum syn. nov. is considered a junior synonym of Haematodes, with Haematodes kuntzeni (Scheerpeltz, 1936) comb. nov. Weiserianum woltersi Bernhauer, 1927 syn. nov. is treated as a synonym of Haematodes tenuipes Kraatz, 1858. Haematodes myteros sp. nov., is described from Paraguay and Brazil. As the type series of Haematodes bicolor Laporte, 1835 is considered lost, a neotype, selected from the original type locality is designated. We also designate a lectotype for H. tenuipes Kraatz, 1858 to stabilize nomenclature for this species, which is similar to H. myteros. As far as known, Haematodes is restricted to the southern Neotropical region and may be nest parasites within Acromyrmex and Atta ant nests as are species of the related genus Scariphaeus, but no direct observations are yet available. We provide a key to the four known species of Haematodes and illustrate their diagnostic features

Ikaros paramo Chatzimanolis & Brunke 2021, gen. et sp. nov.

<i>Ikaros paramo</i> gen. et sp. nov. <p>urn:lsid:zoobank.org:act: 8FE14A94-3312-4BA8-901A-DAE9542DF2B4</p> <p>Figs 2B, 4</p> Diagnosis <p> Among species of <i>Ikaros</i> gen. nov. that lack arch-like carina on terga 3–5, <i>I. paramo</i> gen. et sp. nov. has punctures arranged in multiple rows, whereas <i>I. apteros</i> gen. et sp. nov. lacks any punctures on the pronotum, beyond the punctures along the median area.</p> Etymology <p>The specific epithet is derived from the name of the ecosystem (páramo) where the specimens were collected. It is treated here as a noun in apposition.</p> Type material <p> <b>Holotype</b> (here designated) COLOMBIA • ♂; “ Colombia: Boyacá, SFF Iguaque Qda. Los Francos, 5°25’N 73°27’W, 2860 m, Pitfall, 9–13.iii.2001, P. Reina Leg., M.1345 / SM0650483 [barcode label] / HOLOTYPE <i>Ikaros paramo</i> Chatzimanolis and Brunke, des. Chatzimanolis and Brunke 2020”; IAVH.</p> <p> <b>Paratypes</b> COLOMBIA • 1 ♂; “ Colombia: Boyacá, SFF Iguaque Qda. Los Francos, 5°25′N 73°27′W, 2850 m, Pitfall, 3–5.ix.2000, P. Reina Leg., M.756 / SM05500251 [barcode label]”; UTCI • 1 ♂; same collection data as for preceding; “SM05500250 [barcode label]”; SEMC • 1 ♀; “ Colombia: Boyacá, SFF Iguaque Cabanā Mamaramos, m4, 5°25′N 73°27′W, 2855 m, Malaise, 19.iv–6.v.2000, P. Reina Leg., M.55 / SM0548719 [barcode label]; SEMC • 1 ♀; “ Colombia: Boyacá, SFF Iguaque Cabanā Carrizal, 5°25′N 73°27′W, 2850 m, Pitfall, 9–13.iii.2001, P. Reina Leg., M.1346 / SM0645316 [barcode label]”; SEMC. All paratypes with label “PARATYPE <i>Ikaros paramo</i> Chatzimanolis and Brunke, des. Chatzimanolis and Brunke 2020”.</p> Description <p> Forebody length 5.3–5.9 mm long. Coloration reddish brown with head and mouthparts slightly darker brown. Head transverse, HW/HL ratio = 1.21. Epicranium with numerous large punctures, except impunctate centre; punctures not contiguous, distance between punctures varies; with faint polygonshaped microsculpture. Labial palpus with palpomere 3 widest apically, subparallel-sided.Antennomeres with crown-like macrosetae shorter than length of antennomere. Pronotum longer than wide, PW/PL ratio = 0.88; surface of pronotum with a median impunctate area as wide as 4–5 punctures; with 2–3 rows of disorganized punctures in addition to rows flanking impunctate centre; with faint polygonshaped microsculpture. Elytra shorter than pronotum, EL/PL ratio = 0.79. Elytra with large, deep punctures, distance between punctures equals to width of 0.5–1 punctures; elytra with faint polygonshaped microsculpture. Abdominal terga 3–5 without arch-like carina. Male secondary sexual structures with shallow emargination on sternum 7; with shallow, narrow U-shaped emargination on sternum 8; borders of emargination on sternum 7 and 8 appearing ‘shaved’ (with no setae), but less so than in <i>I. apteros</i> gen. et sp. nov. Aedeagus as in Fig. 4; in dorsal view paramere subequal to median lobe; paramere broad, converging to rounded tip; in lateral view paramere more or less straight. Median lobe in dorsal view broad, narrowing to rounded apex; in lateral view median lobe becoming narrower near apex, with small subapical tooth.</p> Distribution <p>This species is only known from Iguaque Fauna and Flora Sanctuary (SFF Iguaque) in the Boyacá Department of Colombia (Fig. 6).</p> Remarks <p>The holotype is currently in the collection of SEMC but due to the collecting permit requirements (Z. Falin pers. com.), it will be transferred to the IAVH collection in the near future.</p>Published as part of <i>Chatzimanolis, Stylianos & Brunke, Adam J., 2021, A new apterous rove beetle genus (Coleoptera: Staphylinidae) from the Northern Andes with an assessment of its phylogenetic position, pp. 67-82 in European Journal of Taxonomy 744</i> on pages 75-77, DOI: 10.5852/ejt.2021.744.1303, <a href="http://zenodo.org/record/4673914">http://zenodo.org/record/4673914</a&gt

Ikaros Chatzimanolis & Brunke 2021, gen. nov.

<p> <i>Key to the species of Ikaros gen. nov.</i></p> <p> 1. Arch-like carina present on terga 3–5; stark polygon-shaped microsculpture present on the dorsal surface of the head and thorax; long (macrosetae at least twice as long as antennomeres) crown-like macrosetae on antennomeres................................................................. <i>I. polygonos</i> gen. et sp. nov.</p> <p>– Arch-like carina absent on terga 3–5; without stark polygon-shaped microsculpture on the dorsal surface of the head and thorax; crown-like macrosetae on antennomeres not as long, shorter than antennomeres.................................................................................................................................... 2</p> <p> 2. Disc of pronotum with only the few punctures of the dorsal row.............. <i>I. apteros</i> gen. et sp. nov.</p> <p> – Disc of pronotum with multiple rows of punctures................................... <i>I. paramo</i> gen. et sp. nov.</p>Published as part of <i>Chatzimanolis, Stylianos & Brunke, Adam J., 2021, A new apterous rove beetle genus (Coleoptera: Staphylinidae) from the Northern Andes with an assessment of its phylogenetic position, pp. 67-82 in European Journal of Taxonomy 744</i> on page 78, DOI: 10.5852/ejt.2021.744.1303, <a href="http://zenodo.org/record/4673914">http://zenodo.org/record/4673914</a&gt

Ikaros apteros Chatzimanolis & Brunke 2021, gen. et sp. nov.

<i>Ikaros apteros</i> gen. et sp. nov. <p>urn:lsid:zoobank.org:act: 2FB02118-DAD8-4812-AFFE-2ADA3356F97B</p> <p>Figs 2A, 3</p> Diagnosis <p> Among species of <i>Ikaros</i> gen. nov. that lack arch-like carina on terga 3–5, <i>I. apteros</i> gen. et sp. nov. lacks any punctures on the pronotum, beyond the punctures along the median area, whereas <i>I. paramo</i> gen. et sp. nov. has punctures arranged in multiple rows.</p> Etymology <p>The specific epithet is derived from the Greek word ‘άπτερος’ (‘without wings’) and refers to the lack of hind wings. It is treated here as a noun in apposition.</p> Type material <p> <b>Holotype</b> (here designated) COUNTRY UNKNOWN • ♂; “Nov. Gran. [Nova Granada], L.F.S / coll. Kraatz / Xanthopygina ref. <i>Xanthopygus</i> det. A. Brunke 2012 / HOLOTYPE <i>Ikaros apteros</i> Chatzimanolis and Brunke, des. Chatzimanolis and Brunke 2020”; SDEI.</p> <p> <b>Paratype</b> COLOMBIA • ♀; “ Colombia, Cundinamarca, PNN Chingaza Charrascalles, 4°31′ N 73°45′ W, 2990 m, Winkler, 19–21.vi.2002, F. Guzmán Leg., M3239 / SM0548722 [barcode label] / PARATYPE <i>Ikaros apteros</i> Chatzimanolis and Brunke, des. Chatzimanolis and Brunke 2020”; SEMC.</p> Description <p>Forebody length 7.1 mm long. Coloration reddish brown with head and mouthparts slightly darker brown. Head transverse, HW/HL ratio = 1.18. Epicranium mostly impunctate, with few large punctures posteriorly, medially and around margin of head and eye; with faint polygon-shaped microsculpture. Labial palpus with palpomere 3 widest apically, subparallel-sided. Antennomeres with crown-like macrosetae shorter than length of antennomere. Pronotum longer than wide, PW/PL ratio = 0.91; surface of pronotum impunctate except two punctures on each side of median area and few punctures around margin; with faint polygon-shaped microsculpture. Elytra shorter than pronotum, EL/PL ratio = 0.75. Elytra with large, deep contiguous punctures and dense polygon-shaped microsculpture.Abdominal terga 3–5 without arch-like carina. Male secondary sexual structures with shallow but broad emargination on sternum 7; with deep, broad V-shaped emargination on sternum 8; borders of emargination on sternum 7 and 8 appearing ‘shaved’ (with no setae). Aedeagus as in Fig. 3; in dorsal view paramere longer than median lobe; converging to elongate, narrow tip; apex of paramere with small emargination; in lateral view paramere concave, becoming narrower. Median lobe in dorsal view narrowing to rounded apex; in lateral view median lobe becoming narrower near flattened apex, with no subapical tooth.</p> Distribution <p>Known from the National Park Chingaza in the department of Cundinamarca, Colombia (Fig. 6). The holotype was collected in the Republic of New Granada (1831–1858), which refers to a region that included primarily Colombia and Panama, and smaller areas from the countries of Brazil, Costa Rica, Ecuador, Peru and Venezuela.</p>Published as part of <i>Chatzimanolis, Stylianos & Brunke, Adam J., 2021, A new apterous rove beetle genus (Coleoptera: Staphylinidae) from the Northern Andes with an assessment of its phylogenetic position, pp. 67-82 in European Journal of Taxonomy 744</i> on pages 74-75, DOI: 10.5852/ejt.2021.744.1303, <a href="http://zenodo.org/record/4673914">http://zenodo.org/record/4673914</a&gt

A new apterous rove beetle genus (Coleoptera: Staphylinidae) from the Northern Andes with an assessment of its phylogenetic position

A remarkable new apterous genus of Xanthopygina beetles is described here as Ikaros gen. nov. The new genus includes three new species, I. apteros gen. et sp. nov. from Colombia, I. paramo gen. et sp. nov. from Colombia and I. polygonos gen. et sp. nov. from Venezuela. Phylogenetic analyses using molecular and morphological data were performed to assess the phylogenetic position of Ikaros gen. nov. and whether the three new taxa formed a monophyletic group. All analyses, including those with aptery-associated characters removed, strongly supported the monophyly of Ikaros gen. nov. The genus could not be confidently resolved as a member of any of the existing genus-group lineages, likely due to a lack of morphological signal in the backbone of the tree. Further analyses, ideally with molecular data, are needed to determine the position of Ikaros gen. nov.</p