Results 111 to 120 of about 504 (146)

Nicolai Revsneri Leorini Silesii Etesiae, siue Apinae Therinae

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A comparative study of the proventricular structure in corbiculate apinae (Hymenoptera, Apidae)

Micron, 2001
The present study compares the proventricular structure, analyzed under scanning electronic microscope (SEM), among tribes of corbiculate Apinae. Fifty-one species of stingless bees (Meliponini), one species of honeybee (Apini), three species of bumblebees (Bombini) and seven species of orchid bees (Euglossini), were analyzed as in-group, and one ...
JOSÉ Eduardo Serrao
exaly   +5 more sources

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Sex Determination in Bees (Apinae)

Journal of Apicultural Research, 1967
SUMMARYInbred lines of 7 species of social bees were studied, and checked for the presence of diploid male larvae: 7 lines of Apis mellifera, and 15 of Meliponini, representing 6 species. In 3 lines of Apis mellifera showing 50% viability, the non-surviving larvae were males, but diploid males could have some female-like characters. None of the species
Warwick E Kerr
exaly   +2 more sources

Sex determination in honey bees (Apinae and Meliponinae) and its consequences

Genetics and Molecular Biology, 1997
The first experiments on sex determination in bees began with Dzierzon, Meves, Nachtsheim, Paulcke, Petrunkewitsch, Manning. Whiting, (1943) found multiple alleles in Bracon xo that are the Rosetta stone of sex determination in Hymenoptera. Whiting also discovered that some species of microhymenoptera do not possess xo sex alleles.
Warwick Estevam Kerr, Kerr Warwick Estevam   +1 more
exaly   +4 more sources

Comparative Anatomy and Histology of the Alimentary Canal of Adult Apinae

Journal of Apicultural Research, 1967
SUMMARYThe alimentary canals of workers of 15 species of social bees, including Apis, Bombus and four genera of meliponids, were compared. The anatomical differences were greater than the histological ones, and were most noticeable in the most specialized parts of the alimentary canal. In some respects the meliponids formed a group distinct from Bombus
Carminda Da Cruz-Landim
exaly   +2 more sources

Foraging behavior of Melipona rufiventris Lepeletier (Apinae; Meliponini) in Ubatuba, SP, Brazil [PDF]

Brazilian Journal of Biology, 2007
This study describes how the foraging activity of Melipona rufiventris is influenced by the environment and/or by the state of a colony. Two colonies were studied in Ubatuba, SP (44° 48’ W and 23° 22’ S) from July/2000 to June/2001. These colonies were classified as strong (Colony 1) and intermediate (Colony 2) according to their general conditions ...
Kleinert Amp
exaly   +6 more sources

Phylogenetic relationships within the corbiculate Apinae (Hymenoptera) and the evolution of eusociality [PDF]

Journal of Evolutionary Biology, 1999
Abstract We provide a comparison of 520 base pairs of the mitochondrial cytochrome b gene from exemplars of the Meliponini, the Apini, the Bombini and the Euglossini to determine the phylogenetic relationships within the corbiculate Apinae.
null Koulianos, null Schmid-Hempel, null Roubik, null Schmid-Hempel   +3 more
exaly   +2 more sources

Meliponini neotropicais: o gênero Ptilotrigona Moure (Hymenoptera, Apidae, Apinae) [PDF]

Revista Brasileira De Entomologia, 2004
O gênero neotropical de abelhas sem ferrão, Ptilotrigona Moure, 1951, é revisado. Três espécies são reconhecidas: Ptilotrigona occidentalis (Schulz, 1904), endêmica do NW da América do Sul - do NW do Equador até o sul de Darién -, e com uma população isolada na Península de Osa - Costa Rica; P. pereneae (Schwarz, 1943), endêmica do oeste da Amazônia, e
João M F Camargo, Silvia R M Pedro, Pedro Silvia R M   +2 more
exaly   +5 more sources

Neotropical Meliponini: the genus Celetrigona Moure (Hymenoptera: Apidae, Apinae)

Zootaxa, 2009
Three new species of Celetrigona are described: C. euclydiana sp. nov., from Acre, Brazil, C. hirsuticornis sp. nov., from Rondônia, Brazil and C. manauara sp. nov., from the northern Amazon. Additional geographic records are provided for C. longicornis (Friese, 1903), the only previously known species; its nest and the male are described and ...
Camargo, João M. F., Pedro, Silvia R. M.   +1 more
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Ultrastructural characterization of spermatozoa in euglossine bees (Hymenoptera, Apidae, Apinae)

Insectes Sociaux, 2005
Euglossine spermatozoa are the longest described to date for the Hymenoptera. This cell includes a head and a flagellar region. In transverse sections, the acrosome is circular at the tip but has an oval contour along most of its length. The perforatorium penetrates into a deep cavity in the nuclear tip.
U. Zama, J. Lino-Neto, S. M. Mello, L. A. O. Campos, H. Dolder   +4 more
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