Ronquist, F.; Rasnitsyn, A. P.; Roy, A.; Eriksson, K.; Lindgren, M. 1999. Phylogeny of the Hymenoptera: a cladistic reanalysis of Rasnitysn's (1988) data. Zoologica Scripta 28:13-50. PDF

Ross, K. G. 1997. Multilocus selection in fire ants: effects of selection, gene flow and recombination. Genetics 145:961-974.

Ross, K. G.; Gotzek, D.; Ascunce, M. S.; Shoemaker, D. D. 2010. Species delimitation: a case study in a problematic ant taxon. Systematic Biology 59:162-184. PDF

Ross, K. G.; Keller, L. 1998. Genetic control of social organization in an ant. Proceedings of the National Academy of Sciences of the United States of America 95:14232-14237.

Ross, K. G.; Krieger, M. J. B.; Shoemaker, D. D.; Vargo, E. L.; Keller, L. 1997. Hierarchical analysis of genetic structure in native fire ant populations: results from three classes of molecular markers. Genetics 147:643-655.

Ross, K. G.; Shoemaker, D. D. 2005. Species delimitation in native South American fire ants. Molecular Ecology 14:3419-3438. PDF

Ruano, F.; Tinaut, A.; Soler, J. J. 2000. High surface temperatures select for individual foraging in ants. Behavioral Ecology 11:396-404.

Rüger, M. H.; Heinze, J.; Foitzik, S. 2005. Polymorphic microsatellite loci in the ponerine ant, Hypoponera opacior (Hymenoptera, Formicidae). Molecular Ecology Notes 5:236-238. PDF

Radchenko, A.; Antonova, V. 2004. First record of Myrmica rugulososcabrinodis Karawajew, 1929 (Hymenoptera: Formicidae) from Bulgaria. Myrmecologische Nachrichten 6:19-21. PDF

Radchenko, A.; Czechowska, W.; Czechowski, W. 2004. Mrówki - Formicidae. Klucze do Oznaczania Owadów Polski 24(63):1-138. PDF

Radchenko, A.; Czechowska, W.; Czechowski, W.; Antonova, V.; Stankiewicz, A. 2005. Myrmica lacustris Ruzsky (Hymenoptera: Formicidae), an ant species new for Poland. Fragmenta Faunistica (Warsaw) 48:167-174.

Radchenko, A.; Czechowski, W. 1997. Doronomyrmex kutteri (Buschinger, 1965) (Hymenoptera, Formicidae) - a representative of a genus new to Poland. Fragmenta Faunistica (Warsaw) 40:47-51.

Radchenko, A.; Elmes, G. W.; Czechowska, W.; Stankiewicz, A.; Czechowski, W.; Sielezniew, M. 2003. First records of Myrmica vandeli Bondroit and M. tulinae Elmes, Radchenko et Aktaç (Hymenoptera: Formicidae) for Poland, with a key for the scabrinodis- and sabuleti-complexes. Fragmenta Faunistica (Warsaw) 46:47-57.

Radchenko, A.; Zhou, S. 2008. [Untitled. Myrmica weii Radchenko et Zhou, sp. nov.]. Pp. 779-781 in: Radchenko, A. G.; Zhou, S.; Elmes, G. W.; Rigato, F. 2008. Seven new Myrmica species (Hymenoptera: Formicidae) from China. Annales Zoologici (Warsaw) 58:767-784. PDF

Radchenko, A.; Zhou, S.; Elmes, G. W. 2008. [Untitled. Myrmica curiosa Radchenko, Zhou et Elmes, sp. nov.]. Pp. 769-770 in: Radchenko, A. G.; Zhou, S.; Elmes, G. W.; Rigato, F. 2008. Seven new Myrmica species (Hymenoptera: Formicidae) from China. Annales Zoologici (Warsaw) 58:767-784. PDF

Rajan, P. D.; Zacharias, M.; Mustak Ali, T. M. 2006. Insecta: Hymenoptera: Formicidae. Pp. 153-188 in: Director; Zoological Survey of India (ed.) 2006. Fauna of Biligiri Rangaswamy Temple Wildlife Sanctuary (Karnataka). [Conservation Area Series, 27.]. Kolkata: Zoological Survey of India, iv + 263 pp.

Ramos Lacau, L. de S.; Villemant, C.; Bueno, O. C.; Delabie, J. H. C.; Lacau, S. 2008. Morphology of the eggs and larvae of Cyphomyrmex transversus Emery (Formicidae: Myrmicinae: Attini) and a note on the relationship with its symbiotic fungus. Zootaxa 1923:37-54. PDF

Rastogi, N.; Nair, P.; Kolatkar, M.; William, H.; Gadagkar, R. 1997. Ant fauna of the Indian Institute of Science campus - survey and some preliminary observations. Journal of the Indian Institute of Science 77:133-140.

Ratchford, J. S.; Wittman, S. E.; Jules, E. S.; Ellison, A. M.; Gotelli, N. J.; Sanders, N. J. 2005. The effects of fire, local environment and time on ant assemblages in fens and forests. Diversity and Distributions 11:487-497. PDF

Ratsirarson, H.; Robertson, H. G.; Picker, M. D.; van Noort, S. 2002. Indigenous forest versus exotic eucalypt and pine plantations: a comparison of leaf-litter invertebrate communities. African Entomology 10:93-99.

Reichel, H. 1998. Systematics and evolution of the ant genus Rhytidoponera (Ponerinae). [Abstract.]. P. 390 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.

Reichel, H.; Andersen, A. N. 1996. The rainforest ant fauna of Australia's Northern Territory. Australian Journal of Zoology 44:81-95.

Reis, Y. T.; Delabie, J. H. C. 1999. Estudo de uma comunidade de Pseudomyrmecinae usando armadilhas de Malaise numa reserva de mata Atlântica em Porto Seguro, Bahia. Naturalia (São Paulo) 24:119-120.

Reyes López, J.; Luque García, G. 2001. Nuevos datos sobre el género Cardiocondyla (Hym., Formicidae) en Andalucía (en el Sur de la Península Ibérica). Boletín de la Asociación Española de Entomologia 25(3/4):125-126.

Reyes, J. L. 2005. Inventario de la colección de hormigas (Hymenoptera: Formicidae) del Centro Oriental de Ecosistemas y Biodiversidad, Santiago de Cuba, Cuba. Boletín de la Sociedad Entomológica Aragonesa 36:279-283. PDF

Reyes, J.; Espadaler, X. 2005. Tres nuevas especies foráneas de hormigas para la Península Ibérica (Hymenoptera, Formicidae). Boletín de la Sociedad Entomológica Aragonesa 36:263-265. PDF

Ribas, C. R.; Schoereder, J. H. 2004. Determining factors of arboreal ant mosaics in cerrado vegetation (Hymenoptera: Formicidae). Sociobiology 44:49-68.

Ríos-Casanova, L.; Valiente-Banuet, A.; Rico-Gray, V. 2004. Las hormigas del Valle de Tehuacán (Hymenoptera: Formicidae): una comparación con otras zonas áridas de México. Acta Zoológica Mexicana (n.s.)20:37-54. PDF

Rabeling, C.; Cover, S. P. 2007. [Untitled. Trachymyrmex pomonae Rabeling & Cover, new species.]. Pp. 14-16 in: Rabeling, C.; Cover, S. P.; Johnson, R. A.; Mueller, U. G. 2007. A review of the North American species of the fungus-gardening ant genus Trachymyrmex (Hymenoptera: Formicidae). Zootaxa 1664:1-53. PDF

Rabeling, C.; Verhaagh, M.; Engels, W. 2007. Comparative study of nest architecture and colony structure of the fungus-growing ants, Mycocepurus goeldii and M. smithii. Journal of Insect Science 7: Article 40 (available online: insectscience.org/7.40).