Evidence for multiple introductions of an invasive wild bee species currently under rapid range expansion in Europe

摘要

Sex dimorphism of Megachile sculpturalis: a males have a three-toothed mandible and shiny yellow hair on their supraclypeal plate, and lack a metasomal scopa. b females are bigger, with a largely black metasomal scopa except for the first two sternites where hairs are yellow. c As a protandric species, male larvae are positioned at the front in the nests and emerge earlier than females