Booher, D. B. 2021. The ant genus Strumigenys Smith, 1860 (Hymenoptera: Formicidae) in western North America north of Mexico. Zootaxa 5061 (2):201-248. 10.11646/zootaxa.5061.2.1 PDF

Ito, F.; Hashim, R.; Mizuno, R.; Billen, J. 2022. Notes on the biology of Protanilla sp. (Hymenoptera, Formicidae) collected in Ulu Gombak, Peninsular Malaysia. Insectes Sociaux 69:13-18. 10.1007/s00040-021-00839-z PDF

Notes: Published "online early" 27 Oct 2021, without volume number or final pagination.

Wetterer, J. K. 2021. Ants (Hymenoptera, Formicidae) of Saint Vincent, West Indies. Sociobiology 68 (2):5pp. e6725. 10.13102/sociobiology.v68i2.6725 PDF

Ulysséa, M. A. 2021. [Untitled. New species of Hylomyrma attributed to M.A. Ulysséa.]. Pp. 19-21, 37-39, 52-58, 63-83, 86-88, 94-96, 123-135 in: Ulysséa, M. A.; Brandão, C. R. F. 2021. Taxonomic revision of the Neotropical ant genus Hylomyrma Forel, 1912 (Hymenoptera: Formicidae: Myrmicinae), with the description of fourteen new species. Zootaxa 5055 (1):1-137. PDF

Ulysséa, M. A.; Brandão, C. R. F. 2021. Taxonomic revision of the Neotropical ant genus Hylomyrma Forel, 1912 (Hymenoptera: Formicidae: Myrmicinae), with the description of fourteen new species. Zootaxa 5055 (1):1-137. 10.11646/zootaxa.5055.1.1 PDF

Borowiec, L.; Salata, S. 2021. Notes on ants (Hymenoptera: Formicidae) from Western Greece. Annals of the Upper Silesian Museum, Entomology 005:1-23. 10.5281/zenodo.5571258 PDF

Borowiec, L.; Wieczorek, K.; Salata, S. 2021. Review of ants (Hymenoptera: Formicidae) of the Dodecanese Archipelago, Greece. Annals of the Upper Silesian Museum (Entomology) 006:1-33. 10.5281/zenodo.5571270 PDF

Zhuang, Y.; Ran, H.; Li, X.; Feng, C.; Liu, Y. 2022. A new species of the iron maiden ant based on an alate female from mid-Cretaceous Burmese amber (Hymenoptera: Formicidae: †Zigrasimecia). Cretaceous Research 130:105056 (5 pp.). 10.1016/j.cretres.2021.105056 PDF

Adams, R. M. M.; Larsen, R. S.; Stylianidi, N.; Cheung, D.; Qiu, B.; Murray, S. K.; Zhang, G.; Boomsma, J. J. 2021. Hairs distinguish castes and sexes: identifying the early ontogenetic building blocks of a fungus-farming superorganism (Hymenoptera: Formicidae). Myrmecological News 31:201-216. 10.25849/myrmecol.news_031:201 PDF

Pettit, M. J.; Andersen, A. N. 2021. A new species of Epopostruma (Hymenoptera: Formicidae) from monsoonal Australia. Zootaxa 5048 (1):141-144. 10.11646/zootaxa.5048.1.9 PDF

Igodawa, N.; Dobata, S. 2018. Colony structure and life history of Lioponera daikoku (Formicidae: Dorylinae). Asian Myrmecology 10:10 pp. e010006. 10.20362/am.010006 PDF

Borowiec, M. L.; Cover, S. P.; Rabeling, C. 2021. The evolution of social parasitism in Formica ants revealed by a global phylogeny. Proceedings of the National Academy of Sciences of the United States of America 118 (38):10 pp. e2026029118. 10.1073/pnas.2026029118 PDF

Oliveira, A. M.; Powell, S.; Feitosa, R. M. 2021. A taxonomic study of the Brazilian turtle ants (Formicidae: Myrmicinae: Cephalotes). Revista Brasileira de Entomologia 65 (3):52 pp. e20210028. [online early] 10.1590/1806-9665-RBENT-2021-0028 PDF

Boudinot, B. E.; Moosdorf, O. T. D.; Beutel, R. G.; Richter, A. 2021. Anatomy and evolution of the head of Dorylus helvolus (Formicidae: Dorylinae): Patterns of sex- and caste-limited traits in the sausagefly and the driver ant. Journal of Morphology 282:1616-1658. 10.1002/jmor.21410 PDF

Johnson, R. A. 2021. A taxonomic revision of South American species of the seed-harvester ant genus Pogonomyrmex (Hymenoptera: Formicidae). Part II. Zootaxa 5033 (1):1-230. 10.11646/zootaxa.5033.1.1 PDF

Arnol'di, K. V. 1976. [Untitled. New species attributed to K. V. Arnol'di.]. Pp. 88, 103-105 in: Tarbinsky, Y. S. 1976. The ants of Kirghizia. [In Russian.]. Frunze: Ilim, 217 pp. PDF

Consani, M. 1952. [Untitled. New species attributed to M. Consani.]. Pp. 41-42 in: Consani, M.; Zangheri, P. 1952. Fauna di Romagna. Imenotteri - Formicidi. Memorie della Società Entomologica Italiana 31:38-48. PDF

Lewis, J.; Sands, D. 2021. Anonychomyrma inclinata sp. nov. (Hymenoptera: Formicidae): description, biology and interaction with the endangered bulloak jewel butterfly, Hypochrysops piceatus Kerr, Macqueen & Sands, 1969 (Lepidoptera: Lycaenidae). Austral Entomology 60:461-472. 10.1111/aen.12556 PDF

Barrera, C. A.; Sosa-Calvo, J.; Schultz, T. R.; Rabeling, C.; Bacci, M., Jr. 2022. Phylogenomic reconstruction reveals new insights into the evolution and biogeography of Atta leaf-cutting ants (Hymenoptera: Formicidae). Systematic Entomology 47:13-35. 10.1111/syen.12513 PDF

Notes: Published "online early" 3 Sep 2021, without volume number or final pagination.

Espadaler, X. 1997. [Untitled. New species attributed to X. Espadaler.]. Pp. 272-280 in: Cagniant, H.; Espadaler, X. 1997. Les Leptothorax, Epimyrma et Chalepoxenus du Maroc (Hymenoptera: Formicidae). Clé et catalogue des espèces. Annales de la Société Entomologique de France (n.s.)33:259-284. PDF

Cagniant, H. 1997. [Untitled. New species attributed to H. Cagniant.]. Pp. 270-271 in: Cagniant, H.; Espadaler, X. 1997. Les Leptothorax, Epimyrma et Chalepoxenus du Maroc (Hymenoptera: Formicidae). Clé et catalogue des espèces. Annales de la Société Entomologique de France (n.s.)33:259-284. PDF

Heterick, B. E. 2021. A guide to the ants of Western Australia. Part I: Systematics. Records of the Western Australian Museum Supplement 86:245 pp. 10.18195/issn.0313-122x.86.2021.001-245 PDF

Radchenko, A. G.; Proshchalykin, M. Y. 2021. New extinct ant genus (Hymenoptera, Formicidae, Myrmicinae) from late Eocene Rovno amber. Journal of Hymenoptera Research 84:271-282. 10.3897/jhr.84.65238 PDF

Aswaj, P.; Sahanashree, R.; Udayakantha, W. S.; Aniruddha, M.; Priyadarsanan, D. R. 2021. Two new species of doryline ants (Hymenoptera, Formicidae) with 11-segmented antennae from India. ZooKeys 1056:59-72. 10.3897/zookeys.1056.68722 PDF

Yamane, S.; Hosoishi, S.; Syaukani, S. 2021. Taxonomic notes on rattan-inhabting ants of the genus Camponotus (Hymenoptera: Formicidae). Zoosystematica Rossica 30 (2):175-182. 10.31610/zsr/2021.30.2.175 PDF

Fernández, F.; Guerrero, R. J.; Sánchez-Restrepo, A. F. 2021. Systematics and diversity of Neotropical ants. Revista Colombiana de Entomología 47 (1):20 pp. e11082. 10.25100/socolen.v47il.11082 PDF

Fedoseeva, E. B.; Grevtsova, N. A. 2020. Flight muscles degeneration, oogenesis and fat body in Lasius niger and Formica rufa queens (Hymenoptera: Formicidae). Russian Entomological Journal 29 (4):410-420. 10.15298/rusentj.29.4.08 PDF

Matte, A.; Billen, J. P. J. 2021. Flight muscle histolysis in Lasius niger queens. Asian Myrmecology 13:16 pp. e013003. [online early] 10.20362/am.013003 PDF

De Albuquerque, E. Z.; do Prado, L. P.; Andradesilva, J.; De Siqueira, E. L. S.; Sampaio, K. L. D.; Alves, D. L.; Brandão, C. R. F.; Andrade, P. L.; Feitosa, R. M.; Koch, E. B. D.; Delabie, J. H. C.; Fernandes, I.; Baccaro, F. B.; Souza, J. L. P.; Almeida, R. P. S.; Silva, R. R. 2021. Ants of the State of Pará, Brazil: a historical and comprehensive dataset of a key biodiversity hotspot in the Amazon Basin. Zootaxa 5001 (1):1-83. 10.11646/zootaxa.5001.1.1 PDF

González, J. A. 2021. Description of Temnothorax estel sp. nov. (Hymenoptera: Formicidae), with a review of the Iberian species of the sordidulus species-complex. Zootaxa 5005 (2):145–160. 10.11646/zootaxa.5005.2.2 PDF