David Langor

Natural Resources Canada | NRCan · Northern Forestry Centre

The industrial footprint of oil and gas extraction in Alberta, Canada dissects the landscape in a network of linear and polygonal disturbances such as roads and well pads. The changes to biotic and abiotic factors beyond the boundaries of these disturbances into the adjacent ecosystem are called edge effects. A common assumption is that edge effect...

The Palaearctic ten-spotted lady beetle, Adalia decempunctata (Linnaeus), has been confirmed as established in North America, based on morphological characters and DNA barcodes. Its distribution currently appears limited to the Avalon Peninsula of the island of Newfoundland, Canada. Several characters, including the colour of the mesepimera, frons,...

Thirty species of Curculionoidea (28 Curculionidae and one each of Brentidae and Nemonychidae) are reported as new records from the Canadian province of Newfoundland and Labrador, most of them from the island of Newfoundland. As well, 13 species of Curculionidae and one of Brentidae previously recorded from Newfoundland are newly reported from Labr...

Post‐harvest recovery of biodiversity is one of important goals in modern forestry. A variable retention (VR) approach has been of particular interest in North America because it promotes rapid faunal recovery, while minimizing negative lasting impacts of logging on the natural fauna. We studied responses of rove beetles (Coleoptera: Staphylinidae)...

We studied responses of carabid beetles (Coleoptera: Carabidae) to clear-cutting and wildfire in lodgepole pine forests in the foothills of Alberta, Canada during 2013–2014 and compared the results with those from a similar study conducted in the same area during 1989–1990. Assemblages from stands regenerating 12–53 years after harvest gradually re...

The centipede fauna of Canada is reviewed based on information available in the literature and on examination of some material, and provincial and territorial distributions are provided. About 53 species are known from Canada, representing four orders: Scutigeromorpha (1), Scolopendromorpha (5), Geophilomorpha (19), and Lithobiomorpha (28). British...

Epigaeic beetle assemblages were surveyed using continuous pitfall trapping during the summers of 1992 and 1993 in six widely geographically distributed locations in Alberta’s aspen-mixedwood forests prior to initial forest harvest. Species composition and turnover (β-diversity) were evaluated on several spatial scales ranging from Natural Regions...

This is the sixth volume in a series of monographs in which we treat the adventive species of the insect order Coleoptera in Canada. The first volume provided an overview of all recorded species of adventive Coleoptera in eastern Canada (Klimaszewski et al. 2010), and the four subsequent volumes reviewed in detail the Canadian adventive species of...

We studied how carabid beetle assemblages in lodgepole pine stands have responded after clear-cut harvest and wildfires on an actively managed landscape ~20 km south of Hinton, Alberta, Canada. The work builds on and expands a previous study (Niemela et al. 1993) conducted 23-24 years earlier in many of the same stands sampled in the current study....

The currently documented fauna of described species of myriapods in Canada includes 54 Chilopoda, 66 Diplopoda, 23 Pauropoda, and two Symphyla, representing increases of 24, 23, 23, and one species, respectively, since 1979. Of the 145 myriapod species currently documented, 40 species are not native to Canada. The myriapods have not been well docum...

Based on data presented in 29 papers published in the Biota of Canada Special Issue of ZooKeys and data provided herein about Zygentoma, more than 44,100 described species of terrestrial arthropods (Arachnida, Myriapoda, Insecta, Entognatha) are now known from Canada. This represents more than a 34% increase in the number of described species repor...

Keys to genera and species of the tribe Athetini Casey are provided. A review of the species of Acrotona C.G. Thomson (6 spp.), Alevonota C.G. Thomson (1 sp.), Aloconota C.G. Thomson (2 spp.), Amischa C.G. Thomson (1 sp.), Atheta C.G. Thomson (71 spp.), Boreophilia Benick (5 spp.), Boreostiba Lohse (4 spp.), Callicerus Casey (2 spp.), Clusiota Case...

A checklist of eastern Canadian species of Aleocharinae is provided. The fauna currently accounts for 407 verified recorded species (including one new record) in 96 genera, and 16 tribes. The taxonomic arrangement reflects the latest knowledge of the classification of this group of beetles. Tribes are arranged in taxonomic order; genera are either...

Keys to genera and species of the tribe Oxypodini C.G. Thomson are provided. A review of the species of Alisalia Casey (3 spp.), Apimela Mulsant and Rey (2 spp.), Blepharhymenus Solier (1 sp.), Calodera Mannerheim (2 spp.), Cratarea C.G. Thomson (1 spp.), Devia Blackwelder (1 sp.), Dexiogyia C.G. Thomson (1 sp.), Gennadota Casey (1 sp.), Gnathusa F...

Keys to genera and species of the tribe Aleocharini Fleming are provided. A review of the 35 species of Aleochara Gravenhorst and four species of Amarochara C.G. Thomson recorded in eastern Canada is presented. The following is provided for each species: a morphological diagnosis, distribution, information about habitat and methods of collection, k...

Retention harvests may leave retention in aggregations evenly dispersed or in various combinations. Although the relative efficacy of aggregated and dispersed retention for biodiversity conservation is widely debated, there has been little study of combinations. We studied this question relative to saproxylic beetles that initially colonize horizon...

The depth at which pitfall traps were sunk into the ground and the resulting catches of epigaeic Carabidae (Coleoptera) and Staphylinidae (Coleoptera) assemblages in subhygric to hydric ecosites with very deep organic soil layers was investigated in the upper foothills ecoregion of Alberta, Canada. Traps were installed at seven sites, with six surf...

Saproxylic (i.e., deadwood-associated) insects are important functional components of biological diversity in forest ecosystems; however, they depend on microhabitats associated with dying, dead, and decaying wood that are dramatically altered by industrial forestry. Habitat loss and fragmentation by activities, such as clear-cutting, salvage loggi...

Keys to genera and species of the tribe Falagrini Mulsant and Rey are provided. A review of the species of Aleodorus Say (2 spp.), Borboropora Kraatz (1 sp.); Cordalia Jacobs (1 sp.), Falagria Leach (2 spp.), Myrmecocephalus MacLeay (3 spp.), and Myrmecopora Saulcy (1 sp.) recorded in eastern Canada is presented. The following is provided for each...

Keys to genera and species of the tribe Lomechusini Fleming are provided. A review of Drusilla Leach (1 sp.), Myrmedonota Cameron (1 sp.), Myrmoecia Mulsant and Rey (1 sp.), Pella Stephens (6 spp.), Platyusa Casey [removed from fauna of Canada], Zyras Stephens (2 spp.), and Xenodusa Wasmann (2 spp.) recorded in eastern Canada is presented. The foll...

The Aleocharinae fauna of eastern Canada is analyzed for geographic affiliation. Only 4.9–5.9% of the fauna is Holarctic but 11.3% of species are adventive and are of Palaearctic origin. The number of species remaining to be discovered in eastern Canada as a whole and in each of its jurisdictions was estimated using simple calculations. At least 70...

Information is presented on format, abbreviations, diagnostic features including external body structures and genital structures important for identification (e.g. aedeagus, parameres, spermatheca, and terminal segments of abdomen), microdissection and preparation of genital structures for examination and diagnostics, image production, DNA barcodin...

One species of Diglotta Champion of the tribe Diglottini Jakobson, is treated herein. The following is provided for the species: a morphological diagnosis, distribution, information about habitat and methods of collection, key references, colour images of the habitus, and black and white images of the genitalia (median lobe of the aedeagus, spermat...

Keys to genera and species of the tribe Tachyusini C.G. Thomson are provided. A review of the species of Brachyusa Mulsant and Rey (1 sp.), Gnypeta Thomson (10 spp.), and Tachyusa Erichson (4 spp.) recorded in eastern Canada is presented. The following is provided for each species: a morphological diagnosis, distribution, information about habitat...

Keys to genera and species of the tribe Hypocyphtini Laporte are provided. A review of one species of Cypha Leach and five species of Oligota Mannerheim recorded in eastern Canada is presented. The following is provided for each species: a morphological diagnosis, distribution, information about habitat and methods of collection, key references, co...

Keys to genera and species of the tribe Hoplandriini Casey are provided. A review of the four species of Hoplandria Kraatz and one species of Platandria Casey recorded in eastern Canada is presented. The following is provided for each species: a morphological diagnosis, distribution, information about habitat and methods of collection, key referenc...

One species of Halobrecta C.G. Thomson, of the tribe Taxicerini Lohse is treated herein. The following is provided: a morphological diagnosis, distribution, information about habitat and methods of collection, key references, colour images of the habitus, and black and white images of the genitalia (median lobe of the aedeagus, spermatheca) and ter...

A first comprehensive synopsis of all aleocharine rove beetle species (Coleoptera, Staphylinidae) recorded from eastern Canada, from Ontario to the Maritime Provinces inclusively, is presented. Four hundred and seven species in 96 genera, and 16 tribes are presented and discussed.Tribes and subtribes are arranged in presumably phylogenetic order as...

One species of the tribe Boreocyphini Klimaszewski and Langor recorded in eastern Canada is presented. The following is provided for the species: a morphological diagnosis, distribution, information about habitat and methods of collection, key references, colour images of the habitus, and black and white images of the genitalia (median lobe of the...

Keys to genera and species of the tribe Placusini Mulsant and Rey are provided. A review of one species of Euvira Sharp and seven species of Placusa Erichson recorded in eastern Canada is presented. The following is provided for each species: a morphological diagnosis, distribution, information about habitat and methods of collection, key reference...

Keys to genera and species of the tribe Homalotini Heer are provided. A review of the species of Agaricochara Kraatz (1 sp.); Agaricomorpha Ashe (1 sp.), Anomognathus Solier (1 sp.), Cyphea Fenyes (1 sp.), Eumicrota Casey (2 spp.), Gyrophaena Mannerheim (32 spp.), Homalota Mannerheim (1 sp.), Leptusa Kraatz (9 spp.), Neotobia Casey (1 sp.), Phanero...

Progress on the study of aleocharine beetles in eastern Canada during the 26 years since the first Canadian checklist was published is discussed and the accumulation of recorded species during this period is graphically illustrated. The fauna of New Brunswick has gone from nearly unknown (19 species) in 1991 to the most diverse in Canada with 299 s...

One species, Autalia rivularis (Gravenhorst), of the tribe Autaliini C.G. Thomson, is treated herein. The following is provided for the species: a morphological diagnosis, distribution, information about habitat and methods of collection, key references, colour images of the habitus, and black and white images of the genitalia (median lobe of the a...

Keys to genera and species of the tribe Gymnusini Heer are provided. A review of the seven species of Gymnusa Gravenhorst and four species of Deinopsis Matthews recorded in eastern Canada is presented. The following is provided for each species: a morphological diagnosis, distribution, information about habitat and methods of collection, key refere...

A diagnosis of the subfamily Aleocharinae is provided, as well as a key to the 16 tribes of eastern Canadian Aleocharinae.

A key to the species of Myllaena Erichson of the tribe Myllaenini Ganglbauer is provided. A review of nine species of Myllaena Erichson recorded in eastern Canada is presented. The following is provided for each species: a morphological diagnosis, distribution, information about habitat and methods of collection, key references, colour images of th...

Grylloblatta campodeiformis campodeiformis Walker (Grylloblattodea: Grylloblattidae) was commonly collected during summer from trees killed by the mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae), in subalpine forests of Alberta, Canada. Gut content analysis revealed that the grylloblattids fed on subcortical invert...

Low-impact seismic (LIS) techniques were developed to reduce the environmental footprint of oil exploration. Though relatively narrow (∼2–3 m) and constructed with light-weight equipment, these lines cause forest fragmentation, and with their high density and potential edge influence extending into adjacent forest, their impact may be considerably...

Ecological Messages: -Small retention patches (0.46 ha or less) of white spruce do not function well as lifeboats for saproxylic beetles associated with old forests when they are embedded within clear-cuts, but do retain many of these species when embedded within 20% and 50% dispersed reten on harvests. -Dispersed retention acts as a windbreak for...

A synopsis of adventive species of the Coleoptera superfamilies Scarabaeoidea, Scirtoidea, Buprestoidea, Byrrhoidea, Elateroidea, Derodontoidea, Bostrichoidea, and Cleroidea in Canada is presented. Of the 1611 species of those superfamilies recorded from Canada, 106 species in 74 genera and 18 families are reported as adventive, constituting 6.6% o...

Retention of living trees in harvested stands is widely promoted as a way to conserve forest biodiversity; however, the quantity, quality and distribution of retention required to best meet biodiversity conserva- tion goals are uncertain. We compared saproxylic beetle assemblages in dead white spruce among two sizes of retention patches (0.20 ha an...

An understanding of mating systems and fine-scale spatial genetic structure is required to effectively manage forest pest species such as Dendroctonus ponderosae (mountain pine beetle). Here we used genome-wide single-nucleotide polymorphisms to assess the fine-scale genetic structure and mating system of D. ponderosae collected from a single stand...

Ecological Messages: White spruce retention patches maintained saproxylic beetle assemblages similar to those of intact forests, but assemblages in the harvested matrix were very different. Negative edge effects were evident in small and medium patches, especially for predatory and fungus-feeding beetles. Retention patches larger than 3.3 ha better...

The Ecosystem Management Emulating Natural Disturbances (EMEND) project tests the hypothesis that varying levels of green tree retention maintain and retain forest biodiversity better than conventional clear-cutting. We studied epigaeic spiders to assess biodiversity changes two, five and ten years following a range of partial retention harvests (c...

Two new species, Atheta pseudovestita Klimaszewski & Langor, sp. n., Silusa prettyae Klimaszewski & Langor, sp. n., are described, and 16 new provincial records, including one new country record, of aleocharine beetles are presented for the province of Newfoundland and Labrador. Diagnostics, images of habitus and genital structures, distribution, b...

Examination of museum specimens, unpublished collection data, and field surveys conducted between 2010 and 2014 resulted in records for 22 species of sawflies new to Washington State, seven of which are likely to be pest problems in ornamental landscapes. These data highlight the continued range expansion of exotic species across North America. The...

A new species, Anomognathus athabascensis Klimaszewski, Hammond & Langor, sp. n., and nine new provincial records including one new country record of aleocharine beetles are presented for the province of Alberta. Diagnostics, images of habitus and genital structures, distribution, natural history information and new locality data are provided for t...

A new species, Anomognathus athabascensis Klimaszewski, Hammond & Langor, sp. n., and nine new provincial records including one new country record of aleocharine beetles are presented for the province of Alberta. Diagnostics, images of habitus and genital structures, distribution, natural history information and new locality data are provided for t...

Fourteen species of Liogluta Thomson are reported from Canada and Alaska. Three of these are described as new to science: Liogluta castoris Klimaszewski & Webster, sp. n.; Liogluta microgranulosa Klimaszewski & Webster, sp. n.; and Liogluta pseudocastoris Klimaszewski & Webster, sp. n. The previously unknown male of Liogluta gigantea Klimaszewski &...