Phylogeny, diversification patterns and historical biogeography of euglossine orchid bees (Hymenoptera: Apidae)
A comprehensive molecular phylogenetic analysis based on ∼4.0 kb of DNA from four loci across the entire tribe Euglossini indicates that the cleptoparasitic genus Exaerete is sister to the remaining orchid bee genera, and divergence time estimates indicate that extant orchid bees lineages shared a most recent common ancestor at 27–42 Mya.
ESTABLISHMENT OF THE NEOTROPICAL ORCHID BEE EUGLOSSA VIRIDISSIMA (HYMENOPTERA: APIDAE) IN FLORIDA
Influence of Geographical Distribution and Floral Traits on Species Richness of Bees (Hymenoptera: Apoidea) Visiting Echium Species (Boraginaceae) of the Canary Islands
In this study, widespread species of Echium were visited by a larger fraction of EChium‐visiting bee taxa than were rare species, suggesting plant commonness per se may act as a strong attractant of bees.
Description of a new species of Euglossa (Hymenoptera: Apidae: Euglossini) with notes on comparative biology
The species closely resemble E. asarophora Moure & Sakagami, which can be distingui shed by the red color of the h ind tibia, and biological information for both species is summarized.
Development of fewer tumor colonies in lungs of athymic nude mice after intravenous injection of tumor cells.
The formation of tumor colonies was compared in the lungs of athymic nude and normal littermate mice after an iv injection of transplantable syngeneic tumor cells. Each of 5 tumors tested formed…
Cellular immunity to Leishmania donovani. I. The effect of T cell depletion on resistance to L. donovani in mice.
It is suggested that small numbers of thymus-dependent cells which survive irradiation and thymectomy or which may be present in the bone marrow may be sufficient to mount an immune response to L. donovani in mice, and that T cells play an important role in acquired resistance to the parasite.
Cellular immunity to Leishmania donovani. II. Evidence for synergy between thymocytes and lymph node cells in reconstitution of acquired resistance to L. donovani in mice.
Limiting dilution experiments showed that constant minimal numbers of LNC combined with graded numbers of thymocytes, or vice versa, conferred greater protection than expected from the additive effect of both cell types acting independently.
Description of a nest of Euglossa heterosticta from Peru, with taxonomic notes (Hymenoptera: Apidae)
The nest of Euglossa ( Eug Lossa ) heterosticta Moure is described as the first aerial nest in the otherwise cavity-nesting purpurea -group, and taxonomic notes are provided for the heretofore unknown female.