Cardinal, S., J. Straka, & B.N. Danforth (2010). Comprehensive phylogeny of apid bees reveals the evolutionary origins and antiquity of cleptoparasitism. Proc. Natl. Acad. Sci. (USA) [pdf]
Cardinal, S., J. Straka, & B.N. Danforth (2010). Comprehensive phylogeny of apid bees reveals the evolutionary origins and antiquity of cleptoparasitism. Proc. Natl. Acad. Sci. (USA) [pdf]