AntCat
Rohe, W.; Heller, G. 1990b. Vorschlag für eine Rote Liste der Ameisen in Rheinhessen, der Pfalz und dem Naheraum (Hymenoptera, Formicidae). Mainzer Naturwissenschaftliches Archiv 28:143-157.
Rohlfien, K. 1979. Aus der Geschichte der entomologischen Sammlungen des ehemaligen Deutschen Entomologischen Instituts. III. Die Hymenopterensammlung. Beiträge zur Entomologie 29:415-438.

Notes: Collection has 162 genera and 1360 species of Formicidae, 190 of the latter with types.

Rojas Fernández, P. 1996. Formicidae (Hymenoptera). Pp. 483-500 in: González Soriano, E. (ed.) 1996. Biodiversidad, taxonomía y biogeografía de artrópodos de México: hacia una síntesis de su conocimiento. Mexico: Universidad Nacional Autónoma de México, xvi + 660 pp.
Rojas Fernández, P. 2001. Las hormigas del suelo en México: diversidad, distribución e importancia (Hymenoptera: Formicidae). Acta Zoológica Mexicana (n.s.)1(número especial):189-238.
Rojas-Fernández, P. 2009. El género Thaumatomyrmex Mayr 1887 en México (Hymenoptera: Formicidae). Acta Zoológica Mexicana (n.s.)25:61-70. PDF
Rojas-Fernández, P.; Fragoso, C. 1994. The ant fauna (Hymenoptera: Formicidae) of the Mapimi Biosphere Reserve, Durango, Mexico. Sociobiology 24:47-75.
Rojas, P.; Fragoso, C. 2000. Composition, diversity, and distribution of a Chihuahuan desert ant community (Mapimí, México). Journal of Arid Environments 44:213-227.
Roma, G. C.; Bueno, O. C.; Camargo Mathias, M. I. 2005. Comparative study of the fat body in some genera of the Attini tribe (Hymenoptera: Formicidae). Sociobiology 45:449-462. PDF
Romiguier, J.; Borowiec, M. L.; Weyna, A.; Helleu, Q.; Loire, E.; La Mendola, C.; Rabeling, C.; Fisher, B. L.; Ward, P. S.; Keller, L. 2022. Ant phylogenomics reveals a natural selection hotspot preceding the origin of complex eusociality. Current Biology 32:2942-2947. 10.1016/j.cub.2022.05.001 PDF
Romiguier, J.; Rolland, J.; Morandin, C.; Keller, L. 2018. Phylogenomics of palearctic Formica species suggests a single origin of temporary parasitism and gives insights to the evolutionary pathway toward slavemaking behaviour. BMC Evolutionary Biology 18:40. 10.1186/s1186/s12862-018-1159-4 PDF
Ronchetti, G. 1961. Secretergati in popolazioni di formiche del gruppo Formica rufa. Collana Verde 7:61-74.
Ronchetti, G. 1963. Il gruppo Formica rufa in Lombardia (Italia settentrionale). Symposia Genetica et Biologica Italica 12:200-213.
Ronchetti, G. 1965. Il gruppo Formica rufa in Piemonte, Val d'Aosta e Liguria (Italia settentrionale). Collana Verde 16:341-354.
Ronchetti, G. 1966. Le formiche del gruppo Formica rufa sulle Alpi orientali italiane. Bollettino della Società Entomologica Italiana 96:123-137. PDF
Ronchetti, G. 1978a. Distribution of ants of the Formica rufa group in Europe (5 maps). Distribution des fourmis du groupe Formica rufa en Europe (5 cartes). Verbreitung der Ameisen der Gruppe Formica rufa in Europa (5 Karten). Distribuzione delle formiche del gruppo Formica rufa in Europa (5 carte). Pavia: Istituto di Entomologia dell'Università di Pavia, 11 pp., 5 maps.

Notes: Presented at a meeting of the Organisation Internationale de Lutte Biologique contre les Animaux et les Plants Nuisible, Section Regionale Ouest Paléarctique, in Varenna, August 28 - September 2 1978.

Ronchetti, G. 1978b. Distribution of ants of the Formica rufa group in Italy (5 maps). Distribution des fourmis du groupe Formica rufa en Italie (5 cartes). Verbreitung der Ameisen der Gruppe Formica rufa in Italien (5 Karten). Distribuzione delle formiche del gruppo Formica rufa in Italia (5 carte). Pavia: Istituto di Entomologia dell'Università di Pavia, 1 p., 5 maps.
Ronchetti, G. 1980. Distribution des fourmis du groupe Formica rufa en Europe (5 cartes). Deuxième édition. Pavia: Istituto di Entomologia dell'Università di Pavia, 5 maps.
Ronchetti, G. 1981. Distribuzione delle formiche del gruppo Formica rufa in Europa. Collana Verde 59:225-236.
Roncin, E. 2002. Two new Tetramorium species (Hymenoptera: Formicidae) from Vietnam with a discussion of the mixtum, tonganum, and scabrosum groups. Sociobiology 40:281-292. PDF
Roncin, E.; Deharveng, L. 2003. Leptogenys khammouanensis sp. nov. (Hymenoptera: Formicidae). A possible troglobitic species of Laos, with a discussion on cave ants. Zoological Science (Tokyo) 20:919-924. PDF
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
Room, P. M. 1971. The relative distributions of ant species in Ghana's cocoa farms. Journal of Animal Ecology 40:735-751.
Room, P. M. 1975. Diversity and organization of the ground foraging ant faunas of forest, grassland and tree crops in Papua New Guinea. Australian Journal of Zoology 23:71-89.
Roonwal, M. L. 1976. Plant-pest status of root-eating ant, Dorylus orientalis, with notes on taxonomy, distribution and habits (Insecta: Hymenoptera). Journal of the Bombay Natural History Society 72:305-313.
Roques, L.; Torossian, C. 1976 ("1975"). Étude par microscopie électronique à balayage de la morphologie céphalique des ouvrières de fourmis du groupe Formica rufa. Bulletin de la Société d'Histoire Naturelle de Toulouse 111:322-336.
Roques, L.; Torossian, C. 1977 ("1976"). Étude par microscopie électronique à balayage de la morphologie du thorax des ouvrières de fourmis du groupe Formica rufa. (2e note.). Bulletin de la Société d'Histoire Naturelle de Toulouse 112:314-326.
Ros, J.; Olivella, I.; Gili, J. M. (eds.) 1984. Els sistemes naturals de les illes Medes. Arxius de la Secció de Ciències, LXXIII. Barcelona: Institut d'Estudis Catalana, 828 pp.
Rosciszewski, K. 1994. Rostromyrmex, a new genus of myrmicine ants from peninsular Malaysia (Hymenoptera: Formicidae). Entomologica Scandinavica 25:159-168. PDF
Rosciszewski, K.; Maschwitz, U. 1994. Prey specialization of army ants of the genus Aenictus in Malaysia. Andrias 13:179-187.
Rosenblatt, J. S.; Hinde, R. A.; Beer, C.; Busnel, M.-C. (eds.) 1978. Advances in the study of behavior. Volume 8. New York: Academic Press, xiv + 261 pp.