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Behan-Pelletier V.M.,Agriculture and Agri Food Canada | Walter D.E.,Invertebrate Zoology
Zootaxa | Year: 2013

Species in the oribatid mite genus Tectoribates are primarily Palaearctic and Neotropical, with scattered, unidentified records from North America. Herein, we describe 3 new Tectoribates species from dry forest and prairie habitats in North America: T. alcecampestris sp. nov., from Alberta, T. borealis sp. nov., from southern Alberta and Ontario, both on the basis of adults and nymphs, and T. campestris sp. nov., from dry grassland habitats in Ontario and Kansas, on the basis of adults. We provide a revised and expanded diagnosis for adults of Tectoribates. We assess relationships of Tectoribates, using characters of adults and newly discovered apheredermous, plicate immatures. We include observations on Pseudotectoribates which is closely related to Tectoribates. The closest relatives of these genera are hypothesised to be among the Tegoribatidae (Achipterioidea) rather than among the Achipteriidae (Achipterioidea), Oribatellidae (Oribatelloidea), or Ceratozetoidea, as suggested in previous classifications. Finally, we give a key to adults of the world fauna of Tectoribates. © 2013 Magnolia Press. Source


Marshall S.A.,University of Guelph | Rohacek J.,Silesian Museum | Dong H.,Shenzhen Fairylake Botanical Garden | Buck M.,Invertebrate Zoology
Acta Entomologica Musei Nationalis Pragae | Year: 2011

The taxonomy and nomenclature of the family Sphaeroceridae (Diptera: Acalyptratae) is reviewed in the context of a world catalog and bibliography covering the last decade (2000-2010). Bispinicerca Su & Liu, 2009, syn. nov., is synonymized with Opacifrons Duda, 1918 and the following new combinations are given: Opacifrons liupanensis (Su & Liu, 2009), comb. nov., Pseudopterogramma annectens (Richards, 1964), comb. nov., Pseudopterogramma brevivenosum (Tenorio, 1967), comb. nov., and Pseudopterogramma conicum (Richards, 1946), comb. nov. Thirty genera and 211 species were added to the family between 2000 and 2010, giving a current total of 141 genera and 1,550 species. A gallery with 32 macrophotographs is provided, depicting 32 species of 30 genera representing 3 subfamilies of Sphaeroceridae. A world bibliography of Sphaeroceridae is supplemented with 306 references. Source


Cobb T.P.,Invertebrate Zoology | Morissette J.L.,University of Alberta | Jacobs J.M.,University of Alberta | Koivula M.J.,University of Alberta | And 2 more authors.
Conservation Biology | Year: 2011

In Canada and the United States pressure to recoup financial costs of wildfire by harvesting burned timber is increasing, despite insufficient understanding of the ecological consequences of postfire salvage logging. We compared the species richness and composition of deadwood-associated beetle assemblages among undisturbed, recently burned, logged, and salvage-logged, boreal, mixed-wood stands. Species richness was lowest in salvage-logged stands, largely due to a negative effect of harvesting on the occurrence of wood- and bark-boring species. In comparison with undisturbed stands, the combination of wildfire and logging in salvage-logged stands had a greater effect on species composition than either disturbance alone. Strong differences in species composition among stand treatments were linked to differences in quantity and quality (e.g., decay stage) of coarse woody debris. We found that the effects of wildfire and logging on deadwood-associated beetles were synergistic, such that the effects of postfire salvage logging could not be predicted reliably on the basis of data on either disturbance alone. Thus, increases in salvage logging of burned forests may have serious negative consequences for deadwood-associated beetles and their ecological functions in early postfire successional forests. © 2010 Society for Conservation Biology. Source


Behan-Pelletier V.M.,Agriculture and Agri Food Canada | Walter D.E.,Invertebrate Zoology
Zootaxa | Year: 2012

The oribatid mite genus Oribatella (Oribatellidae) includes 18 species known previously from North America. Herein, we describe 11 new Oribatella species from montane, subarctic, forest and prairie habitats in western North America: O. abmi sp. nov., O. banksi sp. nov., O. ewingi sp. nov., O. heatherae sp. nov., O. manningensis sp. nov., O. maryae sp. nov., O. oregonensis sp. nov., O. parallelus sp. nov., O. pawnee sp. nov., O. sintranslamella and O. yukonensis sp. nov. Descriptions of two species (O. heatherae and O. pawnee) include some developmental instars. That of O. yukonensis includes all instars; nymphs retain dorsocentral setae dm and dp, but the setal morphology changes between larva and nymphs. These immatures bear sclerotized areas on the hysterosoma. Adults of Oribatella oregonensis show distinct sexual dimorphism, with three notogastral setae arising from fused porose areas in the male. We provide new distribution records for Oribatella species previously known from North America, including O. arctica Thor, 1930, O. Canadensis Behan-Pelletier and Eamer, 2010, O. jacoti Behan-Pelletier, 2011 and O. reticulatoides Hammer, 1955, and remark on O. anomola Grabowski, 1970. We clarify description of the octotaxic system and the interlamellar region in species of Oribatella and discuss variability in hysterosomal sclerotization and setation in immatures. Finally, we give a key to adults of the 29 species of Oribatella now known from North America. © 2012 Magnolia Press All rights reserved. Source


Walter D.E.,Invertebrate Zoology | Proctor H.C.,University of Alberta
Acarologia | Year: 2010

We present a literature survey and analysis of the profile of mites (Acari, exclusive of Ixodida) in recent literature and on the World Wide Web, and compare their prominence to that of spiders (Araneae). Despite having approximately the same number of described species, spiders outshine mites on the Web, although the study of mites (Acarology) is better represented than the study of spiders (Araneology). Broad searches of scientific literature imply that publications on mites exceed those on spiders by 2-3x; however, this dominance was reversed when a smaller number of journals with broad readerships and no taxonomic orientation (e.g., Nature, Science) were surveyed. This latter analysis revealed that the topical content of mite and spider papers in these general-science journals differs significantly. A troubling leveling-off of taxonomic publications on mites also was discovered. We conclude by suggesting some strategies that acarologists and editorial boards might follow in order to raise mites to their proper status as exemplary models for ecological and evolutionary research. © 2009-2011 ACAROLOGIA. Source

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