Parachartergus apicalis - known to form mutualistic relationships with treehoppers. The male genitalia are noted for their movements of "startling complexity".
^ abHunt, James H.; Carpenter, James M. (October 2004). "Intra-specific Nest Form Variation in Some Neotropical Swarm-founding Wasps of the Genus Parachartergus (Hymenoptera: Vespidae: Epiponini)". Journal of the Kansas Entomological Society. 77 (4): 448–456. doi:10.2317/E-26.1.
^Brito, E. L. S.; Aragão, M.; Santos, G. M. M. (16 May 2018). "Colony defensive behavior by the swarm-founding wasp Parachartergus pseudoapicalis: increase on investment predicts the intensity of nest defense". Insectes Sociaux. 65 (3): 411–417. doi:10.1007/s00040-018-0627-6.
^Mateus, Sidnei; Noll, Fernando Barbosa; Zucchi, Ronaldo (1997). "Morphological Caste Differences in the Neotropical Swarm-Founding Polistine Wasps: Parachartergus smithii (Hymenoptera: Vespidae)". Journal of the New York Entomological Society. 105 (3/4): 129–139. JSTOR25010237.