Widespread polytypic species or complexes of local species? Revising bumblebees of the subgenus Melanobombus world-wide (Hymenoptera, Apidae, Bombus)Paul H. Williams, Michael C. Orr, Yanhui Zhao et al.|European Journal of Taxonomy|2020Cited by 32
When did bumblebees reach South America? Unexpectedly old montane species may be explained by Mexican stopover (Hymenoptera: Apidae)Paul H. Williams, Rémy Vandame, Elaine Françoso et al.|Systematics and Biodiversity|2022Cited by 15
Bumblebees with big teeth: revising the subgenus Alpigenobombus with the good, the bad and the ugly of numts (Hymenoptera: Apidae)Paul H. Williams, Michael C. Orr, Jiandong An et al.|European Journal of Taxonomy|2023Cited by 10
A taxonomic re-assessment of the widespread oriental bumblebee Bombus flavescens (Hymenoptera, Apidae)Chawatat Thanoosing, Paul H. Williams, Michael C. Orr et al.|Journal of Hymenoptera Research|2023Cited by 1
When did bumblebees reach South America? Unexpectedly old montane species may be explained by Mexican stopover (Hymenoptera: Apidae)Paul H. Williams, Rémy Vandame, Elaine Françoso et al.|Figshare|2022Cited by 0