Results 131 to 140 of about 488 (152)
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Neotropical Entomology, 2013
The division of labor is a central theme in the study of social insects. In bees and wasps, this activity is regulated by age polyethism. Important physiological and morphological changes have been widely studied in the polyethism of honeybee workers. In contrast, this is a relatively unexplored subject in social vespids.
Garcia, Z. J., Noll, F. B.
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The division of labor is a central theme in the study of social insects. In bees and wasps, this activity is regulated by age polyethism. Important physiological and morphological changes have been widely studied in the polyethism of honeybee workers. In contrast, this is a relatively unexplored subject in social vespids.
Garcia, Z. J., Noll, F. B.
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Insectes Sociaux, 2004
In the Epiponini, queen number may vary from many to few during the colonial cycle. This cyclical oligogyny may be important for the maintenance of high genetic relatedness found in several taxa of epiponines. Even though queen reduction in accord with the colony cycle has either been demonstrated or inferred for many taxa, the factors responsible for ...
R Zucchi, F S Nascimento
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In the Epiponini, queen number may vary from many to few during the colonial cycle. This cyclical oligogyny may be important for the maintenance of high genetic relatedness found in several taxa of epiponines. Even though queen reduction in accord with the colony cycle has either been demonstrated or inferred for many taxa, the factors responsible for ...
R Zucchi, F S Nascimento
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Insectes Sociaux, 2002
In neotropical swarm-founding wasps, caste differences can be arranged along a spectrum ranging from taxa in which queens and workers are externally similar, to others with fairly distinct caste attributes. In this study, queen-worker differences progressively increase during colony development in Protopolybia exigua and Chartergus globiventris.
F. B. Noll, R. Zucchi
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In neotropical swarm-founding wasps, caste differences can be arranged along a spectrum ranging from taxa in which queens and workers are externally similar, to others with fairly distinct caste attributes. In this study, queen-worker differences progressively increase during colony development in Protopolybia exigua and Chartergus globiventris.
F. B. Noll, R. Zucchi
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Revision and Cladistic Analysis of the Nocturnal Social Wasp Genus, Apoica Lepeletier (Hymenoptera: Vespidae; Polistinae, Epiponini) [PDF]
American Museum Novitates, 2007 Abstract A revision of the nocturnal social wasp genus, Apoica, is presented. The revision is based on a cladistic analysis of morphological, behavioral, and molecular characters of the nine nominal species. The subgenera Deuterapoica and Apoica are consistent with the phylogenetic results, and are thus retained.
John Wenzel
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Toxicon, 2007
In a previous study, we showed that the Polybia paulista wasp venom causes strong myonecrosis. This study was undertaken to characterize the myotoxic potency of mastoparan (Polybia-MPII) isolated from venom (0.25 microg/microl) and injected in the tibial anterior (TA) muscle (i.m.) of Balb/c mice.
Rocha T +3 more
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In a previous study, we showed that the Polybia paulista wasp venom causes strong myonecrosis. This study was undertaken to characterize the myotoxic potency of mastoparan (Polybia-MPII) isolated from venom (0.25 microg/microl) and injected in the tibial anterior (TA) muscle (i.m.) of Balb/c mice.
Rocha T +3 more
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Journal of Natural History, 2009
A cladistic analysis of the swarm‐founding neotropical social wasp genus Charterginus is presented. A single cladogram resulted from the analysis of 31 morphological characters and six nest characters, with relationships among the species as follows: ((C. fulvus + C. xanthura) + (C. weyrauchi + (C. nevermanni + (C. carinatus + C. zavattarii)))).
Andena, Sergio R. +2 more
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A cladistic analysis of the swarm‐founding neotropical social wasp genus Charterginus is presented. A single cladogram resulted from the analysis of 31 morphological characters and six nest characters, with relationships among the species as follows: ((C. fulvus + C. xanthura) + (C. weyrauchi + (C. nevermanni + (C. carinatus + C. zavattarii)))).
Andena, Sergio R. +2 more
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A NEW SPECIES OF PAPER WASP FROM COSTA RICA (HYMENOPTERA: VESPIDAE; POLISTINAE, EPIPONINI)
Journal of the New York Entomological Society, 2002Abstract.-Polybia selvana, a new species of paper wasp from Costa Rica, is described. The social wasp genus Polybia is the one of the largest and most commonly encountered paper wasp genera in the Neotropics. Presently, there are 58 species recognized, with another 19 subspecies (Richards, 1978; Cooper, 1993; Carpenter et al., 2000; Raw, 2000).
James M. Carpenter, Jun-Ichi Kojima
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Insectes Sociaux, 1995
Colonies and nests ofApoica pallens in the llanos region of Venezuela range from small foundress nests to large mature colonies. Nests are sited on small diameter, near-horizontal branches in a variety of shrub and tree species. During the day, adult wasps cluster on the face of the nest in an array that seems to be determined by orientation to gravity;
J. H. Hunt, R. L. Jeanne, M. G. Keeping
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Colonies and nests ofApoica pallens in the llanos region of Venezuela range from small foundress nests to large mature colonies. Nests are sited on small diameter, near-horizontal branches in a variety of shrub and tree species. During the day, adult wasps cluster on the face of the nest in an array that seems to be determined by orientation to gravity;
J. H. Hunt, R. L. Jeanne, M. G. Keeping
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Entomological Science, 2009
AbstractThe thermal characteristics of a colony of Apoica flavissima, an epiponine wasp, were examined. The nest, with a diameter of slightly less than 30 cm, was built on a twig of an orange tree. The temperature of the roof surface fluctuated greatly, ranging between 19.1 and 41.5°C.
Sôichi YAMANE +4 more
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AbstractThe thermal characteristics of a colony of Apoica flavissima, an epiponine wasp, were examined. The nest, with a diameter of slightly less than 30 cm, was built on a twig of an orange tree. The temperature of the roof surface fluctuated greatly, ranging between 19.1 and 41.5°C.
Sôichi YAMANE +4 more
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