Mawdsley, J. R. “Cladistic Analysis and Evolutionary Relationships of <i>Xylocopa</i> Latreille, 1802, Subgenus <i>Xylocopoides</I> Michener, 1954, a New World Lineage of Large Carpenter Bees (Insecta: Hymenoptera: Apidae)”. Tropical Zoology, vol. 30, no. 3, Aug. 2017, pp. 135-43, https://www.pagepress.org/biology/tz/article/view/54.