Palaearctic Protosmia bees of the subgenus Chelostomopsis (Megachilidae, Osmiini): biology, taxonomy and key to species.

@article{Mller2017PalaearcticPB,
  title={Palaearctic Protosmia bees of the subgenus Chelostomopsis (Megachilidae, Osmiini): biology, taxonomy and key to species.},
  author={Andreas M{\"u}ller},
  journal={Zootaxa},
  year={2017},
  volume={4227 2},
  pages={
          zootaxa.4227.2.9
        }
}
Chelostomopsis represents a subgenus of the osmiine bee genus Protosmia (Megachilidae) containing three Palaearctic and one Nearctic species. Analysis of female pollen loads and literature data indicate that all Chelostomopsis species are broad pollen generalists exploiting the flowers of numerous plant families, such as Fabaceae, Asteraceae, Lamiaceae, Cistaceae and Brassicaceae. Preexisting linear cavities in dead wood or pine cones serve as nesting sites and pure resin is used to construct…