Igaponera curiosa, a new ponerine genus (Hymenoptera: Formicidae) from the Amazon

Keywords: Amazonas, ant, identification, Neotropics, taxonomy


The monotypic ant genus Igaponera gen. nov. is proposed to include its type species I. curiosa (Mackay & Mackay, 2010). Igaponera gen. nov. is described and phylogenetically compared with other ponerine genera based on external morphology. The type species is known from a single gyne originally described in the genus Pachycondyla Smith, 1858. Igaponera curiosa is easily diagnosed by: costate sculpture on head, mesosoma, and petiole; short, robust, triangular mandibles with blunt apex; relatively large eyes set at mid-length on sides of head; lack of stridulitrum; and presence of distinct but relatively small arolia. Putative apomorphies of the new genus are: cuticular flange concealing metapleural gland opening; vertically standing hypostomal tooth with recessed base; stout mandibular shape with blunt apex; absence of stout spine-like setae on meso- and metatibial apices. Our phylogenetic results based on morphology suggest that Neoponera Emery, 1901 and Pachycondyla are the closest lineages to Igaponera, which shows intermediate characteristics as compared to those genera. The genus is apparently arboreal, known only from a seasonally flooded Igapó forest near Manaus, Brazil. Despite the collection site being frequented by researchers, no other specimens of this genus have been collected in over 40 years prior to this study.


Adis J. 1981. Comparative ecological studies of the terrestrial arthropod fauna in Central Amazonian inundation forests. Amazoniana 7: 87–173. Available from http://hdl.handle.net/21.11116/0000-0004-6A95-D [accessed 19 May 2022].

Akaike H. 1973. Information theory and an extension of the maximum likelihood principle. In: Petrov B.N. & Csaki F. (eds) 2nd International Symposium on Information Theory: 267–281. Akademia Kiado, Budapest. Available from https://link.springer.com/chapter/10.1007/978-1-4612-1694-0_15 [accessed 19 May 2022].

Anisimova M., Gil M., Dufayard J.F., Dessimoz C. & Gascuel O. 2011. Survey of branch support methods demonstrates accuracy, power, and robustness of fast likelihood-based approximation schemes. Systematic Biology 60 (5): 685–699. https://doi.org/10.1093/sysbio/syr041

Bolton B. 2003. Synopsis and classification of Formicidae. Memoirs of the American Entomological Institute 71: 1–370. Available from https://www.antcat.org/references/130789 [accessed 19 May 2022].

Branstetter M.G. & Longino J.T. 2022. UCE phylogenomics of New World Cryptopone (Hymenoptera: Formicidae) elucidates genus boundaries, species boundaries, and the vicariant history of a temperate–tropical disjunction. Insect Systematics and Diversity 6 (1): 1–23. https://doi.org/10.1093/isd/ixab031

Branstetter M. G., Longino J.T., Ward P.S. & Faircloth B.C. 2017. Enriching the ant tree of life: Enhanced UCE bait set for genome-scale phylogenetics of ants and other Hymenoptera. Methods in Ecology and Evolution 8 (6): 768–776. https://doi.org/10.1111/2041-210X.12742

Delsinne T., Serna F.J., Leponce M. & Boudinot B.E. 2019. Glosario de morfología. In: Fernández F., Guerrero R.J. & Delsinne T. (eds) Hormigas de Colombia: 387–457. Universidad Nacional de Colombia, Bogotá. Available from https://antcat.org/references/143440 [accessed 19 May 2022].

Esteves F.A. & Fisher B.L. 2021. Corrieopone nouragues gen. nov., sp. nov., a new Ponerinae from French Guiana (Hymenoptera, Formicidae). ZooKeys 1074: 83–173. https://doi.org/10.3897/zookeys.1074.75551

Felsenstein J. 1985. Confidence limits on phylogenies: an approach using the bootstrap. Evolution 39 (4): 783–791. https://doi.org/10.1111/j.1558-5646.1985.tb00420.x

Fernández F. & Guerrero R.J. 2019. Subfamilia Ponerinae. In: Fernández F., Guerrero R.J. & Delsinne T. (eds) Hormigas de Colombia: 509–553. Universidad Nacional de Colombia, Bogotá.

Available from https://antcat.org/references/143446 [accessed 19 May 2022].

Goloboff P.A. 2014. Extended implied weighting. Cladistics 30: 260–272. https://doi.org/10.1111/cla.12047

Goloboff P.A. & Catalano S.A. 2016. TNT version 1.5, including a full implementation of phylogenetic morphometrics. Cladistics 32: 221–238. https://doi.org/10.1111/cla.12160

Goloboff P. & Farris J. 2001. Methods for quick consensus estimation. Cladistics 17: S26–S34. https://doi.org/10.1111/j.1096-0031.2001.tb00102.x

Goloboff P.A., Farris J.S., Källersjö M., Oxelman B., Ramírez M.J. & Szumik C.A. 2003. Improvements to resampling measures of group support. Cladistics 19: 324–332. https://doi.org/10.1111/j.1096-0031.2003.tb00376.x

Harris R.A. 1979. A glossary of surface sculpturing. Occasional Papers in Entomology 28: 1–31. https://doi.org/10.5281/zenodo.26215

Hoang D.T., Chernomor O., Von Haeseler A., Minh B.Q. & Vinh L.S. 2018. UFBoot2: improving the ultrafast bootstrap approximation. Molecular Biology and Evolution 35 (2): 518–522. https://doi.org/10.1093/molbev/msx281

Julian G.E. & Gronenberg W. 2002. Reduction of brain volume correlates with behavioral changes in queen ants. Brain, Behavior and Evolution 60 (3): 152–164. https://doi.org/10.1159/000065936

Kalyaanamoorthy S., Minh B.Q., Wong T.K., Von Haeseler A. & Jermiin L.S. 2017. ModelFinder: fast model selection for accurate phylogenetic estimates. Nature Methods 14 (6): 587–589. https://doi.org/10.1038/nmeth.4285

Keller R.A. 2011. A phylogenetic analysis of ant morphology (Hymenoptera: Formicidae) with special reference to the poneromorph subfamilies. Bulletin of the American Museum of Natural History 2011 (355): 1–90. https://doi.org/10.1206/355.1

Lattke J.E. 1994. Phylogenetic relationships and classification of ectatommine ants (Hymenoptera: Formicidae). Entomologica Scandinavica 25: 105–119. Available from https://www.antcat.org/references/126814 [accessed 19 May 2022].

Longino J.T. & Branstetter M.G. 2020. Phylogenomic species delimitation, taxonomy, and 'bird guide' identification of the Neotropical ant genus Rasopone (Hymenoptera: Formicidae). Insect Systematics and Diversity 4 (2): 1: 1–33. https://doi.org/10.1093/isd/ixaa004

Maddison W.P. & Maddison D.R. 2019. MESQUITE: a modular system for evolutionary analysis. Version 3.61. Available from http://www.mesquiteproject.org [accessed 19 May 2022].

MacKay W.P. & MacKay E. 2010. The Systematics and Biology of the New World Ants of the Genus Pachycondyla (Hymenoptera: Formicidae). Edwin Mellen Press, Lewiston, New York. Available from https://www.antcat.org/references/131785[accessed 19 May 2022].

Mariano C., Pompolo S., Gomes J. & Delabie J.H. 2011. Contribution of cytogenetics to the debate on the paraphyly of Pachycondyla spp. (Hymenoptera, Formicidae, Ponerinae). Psyche 2012. https://doi.org/10.1155/2012/973897

Markl H. 1973. The evolution of stridulatory communication in ants. In: Proceedings of the International Congress IUSSI. London. https://doi.org/10.1007/s00040-016-0470-6

Nguyen L.T., Schmidt H.A., Von Haeseler A. & Minh B.Q. 2015. IQ-TREE: a fast and effective stochastic algorithm for estimating maximum-likelihood phylogenies. Molecular Biology and Evolution 32 (1): 268–274. https://doi.org/10.1093/molbev/msu300

Nixon K.C. 2002. WINCLADA, ver. 1.00.08. Published by the author, Ithaca, NY.

Peeters C., Lin C.C., Quinet Y., Segundo G.M. & Billen J. 2013. Evolution of a soldier caste specialized to lay unfertilized eggs in the ant genus Crematogaster (subgenus Orthocrema). Arthropod Structure & Development 42 (3): 257–264. https://doi.org/10.1016/j.asd.2013.02.003

Perrault G.H. 2004. Étude morphoanatomique et biométrique du métasoma antérieur des ouvrières. Contribution à la systématique et à la phylogénie des fourmis (Hymenoptera: Formicidae). In: Taylor & Francis Group (eds) Annales de la Société entomologique de France: 291–371. https://doi.org/10.1080/00379271.2004.10697428

Pyron R.A., Burbrink F.T. & Wiens J.J. 2013. A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes. BMC Evolutionary Biology 13: 1–54. https://doi.org/10.1186/1471-2148-13-93

Richter A., Keller R.A., Rosumek F.B., Economo E.P., Hita Garcia F. & Beutel R.G. 2019. The cephalic anatomy of workers of the ant species Wasmannia affinis (Formicidae, Hymenoptera, Insecta) and its evolutionary implications. Arthropod Structure & Development 49: 26–49. https://doi.org/10.1016/j.asd.2019.02.002

Schmidt C.A. 2013. Molecular phylogenetics of ponerine ants (Hymenoptera: Formicidae: Ponerinae). Zootaxa 3647 (2): 201–250. https://doi.org/10.11646/zootaxa.3647.2.1

Schmidt C.A. & Shattuck S.O. 2014. The higher classification of the ant subfamily Ponerinae (Hymenoptera: Formicidae), with a review of ponerine ecology and behavior. Zootaxa 3817 (1): 1–242. https://doi.org/10.11646/zootaxa.3817.1.1

Schwarz G. 1978. Estimating the dimension of a model. The Annals of Statistics 6 (2): 461–464. https://doi.org/10.1214/aos/1176344136

Sereno P.C. 2007. Logical basis for morphological characters in phylogenetics. Cladistics 23 (6): 565–587. https://doi.org/10.1111/j.1096-0031.2007.00161.x

Wiemers M., Chazot N., Wheat C.W., Schweiger O. & Wahlberg N. 2020. A complete time-calibrated multi-gene phylogeny of the European butterflies. ZooKeys 938: 97–124. https://doi.org/10.3897/zookeys.938.50878

Wild A.L. 2005. Taxonomic revision of the Pachycondyla apicalis species complex (Hymenoptera: Formicidae). Zootaxa 834 (1): 1–25. https://doi.org/10.11646/zootaxa.834.1.1

How to Cite
Troya, A., Marcineiro, F., Lattke, J. E., & Longino, J. (2022). Igaponera curiosa, a new ponerine genus (Hymenoptera: Formicidae) from the Amazon. European Journal of Taxonomy, 823(1), 82-101. https://doi.org/10.5852/ejt.2022.823.1817
Research article