The pollination ecology of Eremosparton songoricum (Litv.) Vass., a rare desert species endemic to central Asia, was examined by a series of observational studies and manipulative experiments in two natural populations during 2007–2008. Results showed that the duration of flowering lasted 21 and 23 days, respectively, in Populations A and B from late May to late June in 2008. Anthesis of a sing...

The nests used in this study were obtained from trap-nests (tubes of cardboard and cut bamboo stems) placed on Santa Carlota Farm (Itaoca Section-IS, Santana Section-SS and Cerrado-Ce), Cajuru, SP, Brazil. The number of nests and corresponding species obtained were as follows: 516 nests of T. curvitarsis, 104 of T. rugulosa, 399 of T. diversipes and 98 of T. gamfaloi. The most abundant species ...

Comments on the phylogenetic relationships and taxonomy of American leafcutter bees of the genus Megachile Latreille subgenus Chrysosarus Mitchell are provided. The South American subgenera Austrosarus Raw, Stelodides Moure, and Zonomegachile Mitchell are newly synonymized under Chrysosarus (new synonymies). 1 Department of Biological Sciences, 100 Campus Drive, Southwestern Oklahoma State Univ...