Pathogens and Parasites
Interspecific geographic distribution and variation of the pathogens Nosema bombi and Crithidia species in United States bumble bee populations (with N. Cordes, F. Huang, James P. Strange, S. A. Cameron, J. D. Lozier, and L. F. Solter), Journal of Invetebrate Pathology (2012)
Taxonomy, systematics, biogeography
Phylogeny of the bee family Megachilidae (Hymenoptera: Apoidea) based on adult morphology (with V. H. Gonzalez, C. J. Praz, and B. N. Danforth), Systematic Entomology (2012)
The identity of the enigmatic Anthidium zonatum (Friese) (Hymenoptera, Megachilidae) (with V. H. Gonzalez), Entomofauna (2012)
Heriades tayrona n. sp., the first osmiine bee from South America (with V. H. Gonzalez), Journal of the Kansas Entomological Society (2011)
Leafcutter and mason bees of the genus Megachile Latreille (Hymenoptera: Megachilidae) in Canada and Alaska (with C. S. Sheffield, C. Ratti, and L. Packer), Canadian Journal of Arthropod Identification (2011)
New species of the Eastern Hemisphere genera Afroheriades and Noteriades (Hymenoptera, Megachilidae), with keys to species of the former (with V. H. Gonzalez), ZooKeys (2011)
Taxonomy, systematics, and biogeography
Taxonomic notes on the small resin bees Hypanthidioides subgenus Michanthidium (Hymenoptera, Megachilidae) (with V. H. Gonzalez), ZooKeys (2011)
The bees of Colorado (Hymenoptera: Apoidea: Anthophila) (with V. L. Scott, J. S. Ascher, and C. R. Nufio), Natural History Inventory of Colorado (2011)
DNA amplification from pin-mounted bumble bees (Bombus) in a museum collection: effects of fragment size and specimen age on successful PCR (with James P. Strange and J. Knoblett), Apidologie (2009)
Phylogeny and biogeography of bees of the tribe Osmiini (Hymenoptera: Megachilidae) (with C. J. Praz, A. Müller, B. N. Danforth, A. Widmer, and S. Dorn), Molecular Phylogenetics and Evolution (2008)
Taxonomic notes on some heriadines with descriptions of three new species, Journal of the Kansas Entomological Society (1994)
Taxonomy, Systematics, biogeography
Phylogeny of the bee family Megachilidae (Hymenoptera: Apoidea) based on adult morphology (with V. H. Gonzalez, C. J. Praz, and B. N. Danforth), Systematic Entomology (2012)
The identity of the enigmatic Anthidium zonatum (Friese) (Hymenoptera, Megachilidae) (with V. H. Gonzalez), Entomofauna (2012)
Heriades tayrona n. sp., the first osmiine bee from South America (with V. H. Gonzalez), Journal of the Kansas Entomological Society (2011)
Leafcutter and mason bees of the genus Megachile Latreille (Hymenoptera: Megachilidae) in Canada and Alaska (with C. S. Sheffield, C. Ratti, and L. Packer), Canadian Journal of Arthropod Identification (2011)
New species of the Eastern Hemisphere genera Afroheriades and Noteriades (Hymenoptera, Megachilidae), with keys to species of the former (with V. H. Gonzalez), ZooKeys (2011)
Pollination and foraging
Diversity and pollination value of insects visiting the flowers of a rare buckwheat (Eriogonum pelinophilum: Polygonaceae) in disturbed and “natural” areas (with Vincent J. Tepedino and W. R. Bowlin), Journal of Pollination Ecology (2011)
Decline in bee diversity and abundance from 1972-2004 on a flowering leguminous tree, Andira inermis in Costa Rica at the interface of disturbed dry forest and the urban environment (with G. W. Frankie, M. Rizzardi, and S. B. Vinson), Journal of the Kansas Entomological Society (2009)
Yellow star-thistle on Santa Cruz Island and Lesvos: Where have the honey bees gone? (with J. F. Barthell, M. L. Clement, D. S. Song, A. N. Savitski, J. M. Hranitz, T. Petanidou, R. W. Thorp, A. M. Wenner, and H. Wells), Uludag Bee Journal (2009)
Bumble bees influence berry size in commercial Vaccinium spp. cultivation in British Columbia (with C. M. Ratti, H. A. Higo, and M. L. Winston), Canadian Entomologist (2008)
Orchard pollination in Capitol Reef National Park, Utah USA. Honey bees or native bees? (with Vincent J. Tepedino, G. Alston, B. A. Bradley, and T. R. Toler), Biodiversity Conservation (2007)
Natural history
Substrates and materials used for nesting by North American Osmia bees (with James H. Cane and Frank D. Parker), Annals of the Entomological Society of America (2007)
Nesting substrates and construction materials are compared for 65 of North America's 139 described native...
Biological Notes on Nomia heteropoda Say (Hymenoptera: Halictidae) (with Frank D. Parker and Joanne H. Botsford), The Pan-Pacific Entomologist (1986)
Notes on the nesting biology of Protosmia (Chelostomopsis) rubifloris (Cockerell), The Pan-Pacific Entomologist (1986)
Biological notes on Andrena (Callandrena) haynesi Viereck and Cockerell (Hymenoptera: Andrenidae) (with Frank D. Parker), The Pan-Pacific Entomologist (1982)
Ecology & conservation
Pollinator nesting guilds respond differently to urban habitat fragmentation in an oak-savannah ecosystem (with L. A. Neame and E. Elle), Insect Conservation and Diversity (2012)
Global invasion by Anthidium manicatum (Linnaeus) (Hymenoptera: Megachilidae): assessing potential distribution in North America and beyond (with James P. Strange, J. B. Koch, V. B. Gonzalez, and L. Nemelka), Biological Invasions (2011)
Patterns of widespread decline in North American bumble bees (with S. A. Cameron, J. D. Lozier, J. P. Strange, J. B. Koch, N. Cordes, and L. F. Solter), Proceedings of the National Academy of Sciences (2011)
Specialist and generalist bee-visitors of an endemic beardtongue (Penstemon caryi: Plantaginaceae) of the Big Horn Mountains, Wyoming (with Vincent J. Tepedino, J. E. Freilich, and P. Shephard), Western North American Naturalist (2011)
Reproductive biology, hybridization, and flower visitors of rare Sclerocactus taxa in Utah’s Uintah Basin (with Vincent J. Tepedino and W. Bowlin), Western North American Naturalist (2010)
No subject area
Patterns of widespread decline in North American bumble bees (with Sidney A. Cameron, Jeffrey D. Lozier, James P. Strange, Jonathan B. Koch, Nils Cordes, and Leellen F. Solter), Publications from USDA-ARS / UNL Faculty (2011)
Bumble bees (Bombus) are vitally important pollinators of wild plants and agricultural crops worldwide. Fragmentary...
Sampling bee communities (Hymenoptera: Apiformes) in a desert landscape: Are pan traps sufficient? (with J. S. Wilson and O. J. Messinger), Journal of the Kansas Entomological Society (2008)
Orchard pollination in Capitol Reef National Park, Utah, USA. Honey bees or native bees? (with Vincent J. Tepedino, Diane Gail Alston, Trent R. Toler, and Brosi A. Bradley), Publications from USDA-ARS / UNL Faculty (2007)
Capitol Reef National Park in central Utah, USA surrounds 22 managed fruit orchards started over...