A new species of the bee genus Ctenoplectrella in middle Eocene Baltic amber (Hymenoptera, Megachilidae)

Why do leafcutter bees cut leaves? New insights into the early evolution of bees

(2011) J. R. Litman et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Biogeographic and evolutionary implications of a diverse paleobiota in amber from the early Eocene of India

(2010) J. Rust et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Baltic amber Ibaliidae (Hymenoptera: Cynipoidea): a new genus with implications for the phylogeny and historical biogeography of the family

(2010) ZHIWEI LIU et al.   SYSTEMATIC ENTOMOLOGY

Systematic melittology: where to from here?

(2010) MICHAEL S. ENGEL   SYSTEMATIC ENTOMOLOGY

Direct and indirect fossil records of megachilid bees from the Paleogene of Central Europe (Hymenoptera: Megachilidae)

(2009) Sonja Wedmann et al.   NATURWISSENSCHAFTEN

New fossil evidence of the early diversification of bees:Paleohabropoda oudardifrom the French Paleocene (Hymenoptera, Apidae, Anthophorini)

(2009) Denis Michez et al.   ZOOLOGICA SCRIPTA