Browsing by Author "Sedivy, Claudio."
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Item Nests, floral preferences, and immatures of the bee Haetosmia vechti (Hymenoptera, Megachilidae, Osmiini). (American Museum novitates, no. 3808)(American Museum of Natural History., 2014-07-21) Gotlieb, Ariella.; Pisanty, Gideon.; Rozen, Jerome G., Jr. (Jerome George), 1928-; Müller, Andreas (Biologist); Röder, Gregory.; Sedivy, Claudio.; Praz, Christophe J.Herein we describe the nests (including structure, closure, orientation, and depth of cells) of the bee Haetosmia vechti Peters found nesting in Rehovot, Israel. The nesting biology of H. vechti mirrors the ancestral nesting biology within the Osmia group of the Osmiini. Nests in sandy soil consist of an excavated burrow, ending below in a small cluster of vertical cells. The cells possess firm walls of masticated leaf pulp of Centaurea procurrens Spreng. and Heliotropium suaveolens M. Bieb., and are covered with pebbles and sand grains. The last larval instar and pupa of Haetosmia vechti are described, as is its cocoon. The immature stages exhibit the basic features of megachilid bees, but tend to have a thinner body vestiture compared to other studied taxa. In addition, we report new information on and review published accounts concerning the pollen collecting behavior of the genus Haetosmia Popov, which contains three species. Pollen taken from scopal hairs of 68 females collected at 17 sites in Turkestan, Morocco, Israel, and the United Arab Emirates was identified as originating solely from Heliotropium L. (Boraginaceae), which strongly suggests that all three Haetosmia species are narrowly oligolectic on this plant genus. In females of all three species, the second segment of the labial palpus is densely covered with rather long, apically curved and capitate bristles, an adaptation to collect Heliotropium pollen from anthers that are hidden inside the narrow corolla tube. Similar pollen-harvesting bristles specifically adapted to exploit flowers of Heliotropium seem to have evolved independently a number of times on different continents, in bees of four families.Item Nests, petal usage, floral preferences, and immatures of Osmia (Ozbekosmia) avosetta (Megachilidae, Megachilinae, Osmiini), including biological comparisons with other osmiine bees. (American Museum novitates, no. 3680)(New York, NY : American Museum of Natural History., 2010) Rozen, Jerome G., Jr. (Jerome George), 1928-; Özbek, Hikmet.; Ascher, John S.; Sedivy, Claudio.; Praz, Christophe J.; Monfared, Alireza.; Müller, Andreas (Biologist)Herein we describe the nests (including construction, closure, orientation, and depth of cells) of the bee Osmia (Ozbekosmia) avosetta Warncke found nesting near Antalya, Turkey, and Sepidan, Iran. Cells are unusual in that they are lined by two layers of colorful flower petals that sandwich a thin middle layer of mud. Analyses of pollen taken from scopal hairs of specimens from the Turkish site were identified as solely from Onobrychis viciifolia Scop. (Fabaceae) whereas those from the Iranian site were from a related plant, Hedysarum elymaiticum Boiss. and Hausskn. These facts coupled with analyses of scopal pollen from 11 other sites in Turkey, Jordan, and Syria strongly suggest that this bee is oligolectic with respect to the plant tribe Hedysareae. The egg and last larval instar of Osmia avosetta are described. The presence of an egg taken from a cell and provisionally identified as belonging to Sapyga pulcherrima Morawitz suggests that this cleptoparasite may have this bee as one of its hosts. In addition, we report new information on and review published accounts concerning the use of whole petals or large petal pieces in the construction of cell walls of osmiine bees. Only Osmia (Ozbekosmia) avosetta and species of Osmia (Tergosmia) have three-layered cell walls with the middle layer made of mud. Recorded also are the similarities and differences exhibited in pollen and petal preferences and nest characteristics of species in these two related subgenera.