@article {1731,
	title = {Identificaci{\'o}n de las {\textquotedblleft}abejas sociales{\textquotedblright} del g{\'e}nero Bombus (Hymenoptera, Apidae) presentes en la Argentina: clave pict{\'o}rica, diagnosis, distribuci{\'o}n geogr{\'a}fica y asociaciones florales},
	journal = {Revista de la Facultad de Agronom{\'{\i}a, La Plata},
	volume = {106},
	year = {2007},
	pages = {165-176},
	chapter = {165},
	abstract = {<p>En el presente trabajo se registran nueve especies de abejas sociales del g\&eacute;nero Bombus Latreille (Hymenoptera, Apidae) para Argentina; para su identificaci\&oacute;n se propone una clave pict\&oacute;rica sencilla y para cada una de las especies se incluye una diagnosis, la distribuci\&oacute;n geogr\&aacute;fica y sus asociaciones florales.</p>
},
	keywords = {Argentina., BOMBUS, clave ilustrada, identificaci{\'o}, polinizadores},
	issn = {0041-8676},
	url = {http://www.agro.unlp.edu.ar/uploads/R/106_165_176.pdf},
	author = {Alberto H Abrahamovich and Norma B. Diaz and Mariano Lucia}
}
@article { ISI:000246496000008,
	title = {The male of Megachile nivalis Friese, with an updated key to members of the subgenus Megachile s. str. (Hymenoptera : Megachilidae) in North America},
	journal = {JOURNAL OF HYMENOPTERA RESEARCH},
	volume = {16},
	number = {{1}},
	year = {2007},
	pages = {178-191},
	abstract = {{The previously unknown male of Megachile nivalis Friese is described. Males of this species are very similar to those of M. relativa Cresson and because of geographic overlap of the two species, many male specimens presently identified as M. relativa within collections may actually be M. nivalis. An identification key and illustrations of mandibles are provided for females and males of the subgenus Megachile s. str. of North America. Images of genitalia, selected sterna, the lower genal area, clypeus, and forewings for males of both M. relativa and M. nivalis are also provided for comparison and to facilitate differentiation of the two species. A tabular summary is also provided for species of Megachile in North America that are known from only one sex to encourage the search for possible additional synonyms or hitherto unknown sexes.}},
	issn = {1070-9428},
	author = {Sheffield, Cory S. and Westby, Sue M.}
}
@article {700,
	title = {Nesting habitats and rates of cell parasitism in some bee species of the genera Ancyloscelis, Centris, and Euglossa (Hymenoptera: Apidae) from Colombia},
	journal = {Bolet{\'{\i}n del Museo de Entomolog{\'{\i}a de la Universidad del Valle},
	volume = {8},
	year = {2007},
	chapter = {23-29},
	author = {Gonzalez, V.H. and Palacios, E. and Trujillo, E.}
}
@article {1446,
	title = {New enigmatic Andean bee species of Protandrena (Hymenoptera, Andrenidae, Panurginae)},
	journal = {Revista Brasileira de Entomologia},
	volume = {51},
	year = {2007},
	chapter = {397-403},
	author = {Gonzalez, V.H. and Ruz, L.}
}
@article {778,
	title = {A review of the North and Central American Megachile subgenus Argyropile Mitchell (Hymenoptera: Megachilidae)},
	journal = {Zootaxa},
	volume = {1461},
	year = {2007},
	author = {Gonzalez, V.H. and Griswold, T.}
}
@article {888,
	title = {Substrates and Materials Used for Nesting by North American Osmia Bees (Hymenoptera: Apiformes: Megachilidae)},
	journal = {ANNALS OF THE ENTOMOLOGICAL SOCIETY OF AMERICA},
	volume = {100},
	year = {2007},
	chapter = {350-358},
	author = {Cane, J. H. and Griswold, T. and Parker, F. D.}
}
@article {604,
	title = {Una especie nueva de Geotrigona (Hymenoptera: Apidae, Meliponini), con comentarios sobre el g{\'e}nero en Colombia},
	journal = {Acta Biologica Colombiana},
	volume = {12S},
	year = {2007},
	chapter = {103-108},
	keywords = {Apoidea, stingless bees, taxonomy},
	author = {Gonzalez, V.H. and Sep{\'u}lveda, P. A.}
}
@article {596,
	title = {Una especie nueva de Paratrigona (Hymenoptera: Apidae, Meliponini), con una sinopsis del genero en Colombia},
	journal = {Bolet{\'{\i}n del Museo de Entomolog{\'{\i}a de la Universidad del Valle},
	volume = {8},
	year = {2007},
	chapter = {9-13},
	abstract = {<p>We describe Paratrigona uwa sp. nov., species apparently endemic to the cordillera Oriental of Colombia. We also provide new geographical records and a synopsis of the 10 species of Paratrigona that occur in Colombia. We did not find specimens of P. impuntacta and P. ornaticeps in the examined insect collections; therefore, it is likely that previous records of these species for Colombia are misidentified specimens.</p>
},
	keywords = {Andes, Apoidea, taxonomy},
	author = {Gonzalez, V.H. and V{\'e}lez, D.}
}
@article { ISI:000255098000011,
	title = {Diversity of cavity-nesting bees (Hymenoptera : Apoidea) within apple orchards and wild habitats in the Annapolis Valley, Nova Scotia, Canada},
	journal = {CANADIAN ENTOMOLOGIST},
	volume = {140},
	number = {{2}},
	year = {2007},
	month = {MAR-APR},
	pages = {235-249},
	abstract = {Solitary cavity-nesting bees, especially trap-nesting Megachilidae, have great potential as commercial pollinators. A few species have been developed for crop pollination, but the diversity, abundance, and potential pollination contributions of native cavity-nesting bees within agricultural systems have seldom been assessed. Our objectives were to compare the diversity and fecundity of cavity-nesting bees in Nova Scotia in natural ecosystems with those in apple orchards under three levels of management, using trap nests, and to determine whether any native bees show promise for development as pollinators. Our results show that species richness and numbers of bees reared from trap nests in commercially managed orchards, abandoned orchards, and natural habitats were similar, and species{\textquoteright} compositional patterns were not unique to specific habitats. Trap nests can be used to increase and maintain cavity-nesting bee populations within Nova Scotia apple orchards. Osmia tersula Cockerell (Megachilidae), which accounted for almost 45\% of all bees captured and was the most abundant species nesting in all habitats evaluated, should be assessed for potential as a commercial pollinator of spring-flowering crops. The influence of natural cavities on bee species richness in trap-nesting surveys is also discussed.},
	issn = {0008-347X},
	author = {Sheffield, Cory S. and Kevan, Peter G. and Westby, Sue M. and Smith, Robert F.}
}
@inbook {1583,
	title = {Floral specialization by bees: analytical methods and a revised lexicon for oligolecty},
	booktitle = {Plant-Pollinator Interactions: From Specialization to Generalization},
	year = {2007},
	month = {2007///},
	pages = {99 - 122},
	publisher = {Univ. Chicago},
	organization = {Univ. Chicago},
	address = {Chicago, Illinois USA},
	keywords = {Apoidea, METHODS, OLIGOLECTY, POLLEN, POLLEN LOAD- BEE, POLLEN- ANALYSIS},
	author = {Cane, J. H. and Sipes,S.},
	editor = {Waser,N.M. and Ollerton,J.}
}
@article {1624,
	title = {Foraging behavior, pollinator effectiveness, and management potential of the new world squash bees Peponapis pruinosa and Xenoglossa strenua (Apidae: Eucerini)},
	volume = {42},
	year = {2007},
	month = {2007///},
	pages = {459 - 459},
	keywords = {ANTHOPHORIDAE, BEHAVIOR-FORAGING, CUCURBITACEAE, OLIGOLECTY, POLLINATION, POLLINATION EFFICIENCY, POLLINATOR},
	url = {ISI:000246456600143},
	author = {Sampson,B.J. and Knight,P.R. and Cane, J. H. and Spiers,J.M.}
}
@article {1599,
	title = {Importance of pollinators in changing landscapes for world crops},
	journal = {Proceedings of the Royal Society B: Biological Sciences},
	volume = {274},
	year = {2007},
	month = {2007///},
	pages = {303 - 313},
	abstract = {The extent of our reliance on animal pollination for world crop production for human food has not previously been evaluated and the previous estimates for countries or continents have seldom used primary data. In this review, we expand the previous estimates using novel primary data from 200 countries and found that fruit, vegetable or seed production from 87 of the leading global food crops is dependent upon animal pollination, while 28 crops do not rely upon animal pollination. However, global production volumes give a contrasting perspective, since 60\% of global production comes from crops that do not depend on animal pollination, 35\% from crops that depend on pollinators, and 5\% are unevaluated. Using all crops traded on the world market and setting aside crops that are solely passively self-pollinated, wind-pollinated or parthenocarpic, we then evaluated the level of dependence on animal-mediated pollination for crops that are directly consumed by humans. We found that pollinators are essential for 13 crops, production is highly pollinator dependent for 30, moderately for 27, slightly for 21, unimportant for 7, and is of unknown significance for the remaining 9. We further evaluated whether local and landscape-wide management for natural pollination services could help to sustain crop diversity and production. Case studies for nine crops on four continents revealed that agricultural intensification jeopardizes wild bee communities and their stabilizing effect on pollination services at the landscape scale.},
	keywords = {COMMUNITIES, DIVERSITY, POLLINATION, POLLINATOR, SEED, SEED PRODUCTION},
	url = {http://dx.doi.org/10.1098/rspb.2006.3721},
	author = {Klein,A.M. and Vassiere,B.E. and Cane, J. H. and Steffan-Dewenter,I. and Cunningham,S. and Kremen,C. and Tscharntke,T.}
}
@article {1582,
	title = {Substrates and materials used for nesting by North American Osmia bees},
	journal = {Annals of the Entomological Society of America},
	volume = {100},
	year = {2007},
	month = {2007///},
	pages = {350 - 358},
	abstract = {Nesting substrates and construction materials are compared for 65 of North America{\textquoteright}s 139 described native species of Osmia bees. Most accounts report Osmia bees nesting in preexisting cavities in dead wood or pithy stems such as elderberry (Sambucus spp.), with cell partitions and plugs made from a pulp of finely masticated leaf tissue. Mud is widely used by species constructing free-form clumps of nest cells against stone surfaces. Some Osmia bees adopt abandoned nests of other Hymenoptera, particularly those of mud dauber wasps (Sceliphron spp.) and larger ground-nesting bees (e.g., Anthophora spp.). Reports of subterranean nesting by Osmia species are uncommon but possibly under-represent the habit, because subterranean nests are obscure and likely to be scattered. Ground- or surface-nesting habits are suspected for species that are absent from intensive trap-nesting programs in their native ranges but that otherwise have been commonly taken at flowers. The range of nesting habits and materials of European species are largely comparable, although records indicate that far more European species may nest in empty snail shells},
	keywords = {BEHAVIOR-NESTING, Megachilidae, OSMIA, SOIL},
	author = {Cane, J. H. and Griswold, T. and Parker, F. D.}
}
@article {798,
	title = {Abejas Chilicola (Hylaeosoma) Ashmead (Colletidae: Xeromelissinae) del Grupo megalostigma: una Especie Nueva de Colombia y Clave para las Especies},
	journal = {Neotropical Entomology},
	volume = {36},
	year = {2007},
	chapter = {910-913.},
	author = {Smith-Pardo, A and Gonzalez, V.H.}
}
@article {1433,
	title = {First record of Eufriesea bare Gonz{\'a}lez \& Gaiani and notes on the distribution of three species of orchid bees pertaining to the genus Euglossa Latreille (Apidae: Euglossini) in Colombia},
	journal = {Revista de la Academia Colombiana de Ciencias Naturales},
	volume = {31},
	year = {2007},
	chapter = {415-423},
	author = {Parra-H, A. and Nates-Parra, G.}
}
