Pitts, J. P.; McHugh, J. V.; Ross, K. G. 2005. Cladistic analysis of the fire ants of the Solenopsis saevissima species-group (Hymenoptera: Formicidae). Zoologica Scripta 34:493-505. PDF

Poinar, G., Jr.; Archibald, B.; Brown, A. 1999. New amber deposit provides evidence of early Paleogene extinctions, paleoclimates, and past distributions. Canadian Entomologist 131:171-177. PDF

Poinar, G.; Baroni Urbani, C.; Brown, A. 2000. The oldest ants are Cretaceous, not Eocene: reply. Canadian Entomologist 132:695-696.

Pontin, A. J. 1996. British Formica rufibarbis F. (Hym., Formicidae) is not a hopeless case yet. Entomologist's Monthly Magazine 132:290.

Pontin, A. J. 1997. Intraspecific nest spacing and the diversity of species in an ant community. Entomologist's Monthly Magazine 133:1-8.

Poole, R. W. 1996. Nomina insecta nearctica. A check list of the insects of North America. Volume 2. Hymenoptera, Mecoptera, Megaloptera, Neuroptera, Raphidioptera, Trichoptera. Rockville, Maryland: Entomological Information Services, 793 pp.

Popp, M. P.; Grisshammer, R.; Hargrave, P. A.; Smith, W. C. 1996. Ant opsins: sequences from the Saharan silver ant and the carpenter ant. Invertebrate Neuroscience 1:323-329.

Porter, S. D. 1998. Accessing "FORMIS: a master bibliography of ant literature" on the World Wide Web. [Abstract.]. P. 377 in: Schwarz, M. P.; Hogendoorn, K. (eds.) 1998. Social insects at the turn of the millennium. Proceedings of the XIII International Congress of IUSSI. Adelaide, Australia. 29 December 1998 - 3 January 1999. Adelaide: XIII Congress of IUSSI, 535 pp.

Prince, A. J.; Boyce, D. C. 2001. An important new site for Tapinoma erraticum (Latreille) (Hym., Formicidae) in Britain. Entomologist's Monthly Magazine 137:143.

Punttila, P. 1996. Succession, forest fragmentation, and the distribution of wood ants. Oikos 75:291-298.

Punttila, P.; Haila, Y.; Tukia, H. 1996. Ant communities in taiga clearcuts: habitat effects and species interactions. Ecography 19:16-28.

Pusch, K.; Heinze, J.; Foitzik, S. 2006. The influence of hybridization on colony structure in the ant species Temnothorax nylanderi and T. crassispinus. Insectes Sociaux 53:439-445. PDF

Pusch, K.; Seifert, B.; Foitzik, S.; Heinze, J. 2006. Distribution and genetic divergence of two parapatric sibling ant species in Central Europe. Biological Journal of the Linnean Society 88:223-234. PDF

Quek, S. P.; Davies, S. J.; Itino, T.; Pierce, N. E. 2002. Did Crematogaster and Macaranga cospeciate? The phylogenesis of host association in a wetern Malesian ant-plant mutualism. [Abstract.]. P. 194 in: Billen, J. P. J. 2002. XIV International Congress of IUSSI. The Golden Jubilee Proceedings. 27 July - 3 August 2002, Hokkaido University, Sapporo, Japan. Sapporo: XIV International Congress of IUSSI, 233 pp.

Quek, S.-P.; Davies, S. J.; Itino, T.; Pierce, N. E. 2004. Codiversification in an ant-plant mutualism: stem texture and the evolution of host use in Crematogaster (Formicidae: Myrmicinae) inhabitants of Macaranga (Euphorbiaceae). Evolution 58:554-570. PDF

Quiran, E. M. 2007. El género neotropical Brachymyrmex Mayr (Hymenoptera: Formicidae) en la Argentina. III: Redescripción de las especies: B. aphidicola Forel, de B. australis Forel y B. constrictus Santschi. Neotropical Entomology 36:699-706. PDF

Quiroz-Robledo, L. N. 2003. Primer registro del género Cylindormyrmex Mayr (Hymenoptera: Formicidae: Cerapachyinae) para México. Folia Entomologica Mexicana 42:295-296.

Quiroz-Robledo, L. N.; Valenzuela-González, J. 2003. Las hormigas ponerinas y cerapaquinas (Formicidae: Ponerinae y Cerapachyinae) de la Estación Biología Tropical "Los Tuxtlas", Veracruz, México. Folia Entomologica Mexicana 42:381-395.

Quiroz-Robledo, L. N.; Valenzuela-González, J.; Alemán-Castrejón, G. 2004. Pseudomyrmecine ants (Hymenoptera: Formicidae) from the state of Morelos, Mexico. Sociobiology 43:233-253.

Quiroz-Robledo, L. N.; Valenzuela-González, J.; Suárez-Landa, T. 2002. Las hormigas ecitoninas (Formicidae: Ecitoninae) de la Estación Biología Tropical "Los Tuxtlas", Veracruz, México. Folia Entomologica Mexicana 41:261-281.

Orr, M. R.; Seike, S. H.; Benson, W. W.; Dahlsten, D. L. 2001. Host specificity of Pseudacteon (Diptera: Phoridae) parasitoids that attack Linepithema (Hymenoptera: Formicidae) in South America. Environmental Entomology 30:742-747.

Ortius-Lechner, D. 2002. Phylogeography of the genus Epimyrma (Hymenoptera; Formicidae). [Abstract.]. P. 139 in: Billen, J. P. J. 2002. XIV International Congress of IUSSI. The Golden Jubilee Proceedings. 27 July - 3 August 2002, Hokkaido University, Sapporo, Japan. Sapporo: XIV International Congress of IUSSI, 233 pp.

Ortiz, G.; Camargo-Mathias, M. I. 2003. Morphohistological study of the venom gland in workers of the ant Pachycondyla striata F. Smith (Hymenoptera: Ponerinae). Sociobiology 42:103-116.

Palacio, E. E. 2003. Subfamilia Ecitoninae. Pp. 281-285 in: Fernández, F. (ed.) 2003. Introducción a las hormigas de la región Neotropical. Bogotá: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, xxvi + 424 pp.

Palacio, E. E.; Fernández, F. 2003. Claves para las subfamilias y géneros. Pp. 233-260 in: Fernández, F. (ed.) 2003. Introducción a las hormigas de la región Neotropical. Bogotá: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, xxvi + 424 pp.

Pang, G.-F.; Qin, F.; Zhou, S.-Y.; Qin, X.-M. 2009. Molecular phylogenetic research on some species of Camponotus (Hymenoptera: Formicidae). Journal of Guangxi Normal University (Natural Science Edition) 27:62-66.

Parker, J. D. 2004. A major evolutionary transition to more than two sexes? Trends in Ecology and Evolution 19:83-86. PDF

Parker, J. D.; Dowling, T. E.; Johnson, R. A.; Rissing, S. W. 1998. Evolutionary origins of the ant social parasites of the North American seed harvester ants Pogonomyrmex. [Abstract.]. P. 361 in: Schwarz, M. P.; Hogendoorn, K. (eds.) 1998. Social insects at the turn of the millennium. Proceedings of the XIII International Congress of IUSSI. Adelaide, Australia. 29 December 1998 - 3 January 1999. Adelaide: XIII Congress of IUSSI, 535 pp.

Parker, J. D.; Rissing, S. W. 2002. Molecular evidence for the origin of workerless social parasites in the ant genus Pogonomyrmex. Evolution 56:2017-2028. PDF

Parr, C. L.; Bond, W. J.; Robertson, H. G. 2002. A preliminary study of the effect of fire on ants (Formicidae) in a South African savanna. African Entomology 10:101-111.