File:Osten, T. 2007. 11.18 Hymenoptera bees, wasps and ants (10.1017@CBO9780511535512).pdf

Summary
Osten, T. 2007. 11.18 Hymenoptera: bees, wasps and ants. Pp. 350-365 in: Martill, D. M., Bechly, G., Loveridge R. F. (eds.) 2007. The Crato Fossil Beds of Brazil: Window into an Ancient World. Cambridge: Cambridge University Press, 625 pp..