- Head anterior to antennnal sockets strongly narrowed from side to side
- Masticatory margins of mandibles oppose but do not overlap when mandibles fully closed
- Trigger hairs on labrum or mandible
- Specialized labral shape
- Preocular carina present
In addition, the tribe has the following apomorphies:
- Mandible with a medially projecting cuticular basimandibular process on inner margin close to base (an extrusion of the mandible)
- Dorsum of labrum with one or two medial impressions that receive the basimandibular processes when the mandibles are fully closed
Dacetini is a tribe of small predatory ants in the subfamily Myrmicinae. The tribe is large and diverse, containing more than 900 species in eight genera. The systematic status of the tribe has been the focus of debate, and there is evidence that suggests that Dacetini may not be monophyletic.
The tribe is composed of small, cryptic, predatory ants that typically occur in soil and/or leaf litter where they feed on various minute arthropods. Species in this group show great diversity in predatory strategies, which is reflected in the marked differentiation between species groups. With their unique-looking body types and head shapes that are variously adorned with bizarre station, elongate mandibles with uniquely arrayed dentition, and as-yet-unexplained cuticular outgrowths called spongiform tissue, members of this group are among the most unusual in the ant world.
Baroni Urbani & De Andrade (1994) synonymized Dacetini as well as Phalacromyrmecini under Basicerotini, and synonymized all subtribal names accepted at the time. Bolton (1995) revived Basicerotini from synonymy of the then so-called Dacetonini and, in 1998, listed and commented the apomorphies of the Dacetini tribe group and its components, including the Basicerotini, which he considers as monophyletic. Baroni Urbani & de Andrade (2007) proposed a synonymization of the tribe Basicerotini with Dacetini and that all basicerotine genera be placed in the single genus Basiceros. There is currently variable acceptance of their reclassification. Bolton (2012), who partially accepted the propositions made by Baroni-Urbani & De Andrade (2007) for Dacetini, yet still considering Basicerotini (Basiceros, Eurhopalothrix, Octostruma, Protalaridris, Rhopalothrix and Talaridris) and Phalacromyrmecini (Phalacromyrmex) as separate tribes from Dacetini.
- Bolton, B. (2013), "An online catalog of the ants of the world.", AntCat, retrieved 9 October 2013
- Chen et al 2012, p. 1
- Baroni Urbani & de Andrade 1994, pp. 10–12
- Bolton 1995, p. 1040
- Feitosa, Brandão & Dietz 2007, p. 32
- Baroni Urbani & de Andrade 2007, pp. 81, 90–93
- Longino 2013, p. 4
- Ulysséa & Brandão 2013, p. 188
- Azorsa & Sosa-Calvo 2008, p. 28
- Azorsa, Frank; Sosa-Calvo, Jeffrey (2008), "Description of a remarkable new species of ant in the genus Daceton Perty (Formicidae: Dacetini) from South America.", Zootaxa 1749: 27–38
- Baroni Urbani, C.; de Andrade, M.L. (2007), "The ant tribe Dacetini: Limits and constituent genera, with descriptions of new species.", Annali del Museo Civico di Storia Naturale "Giacomo Doria 99: 1–191
- Baroni Urbani, C.; de Andrade, M.L. (1994), "First description of fossil Dacetini ants with a critical analysis of the current classification of the tribe (Amber Collection Stuttgart: Hymenoptera, Formicidae. VI: Dacetini).", Stuttgarter Beiträge zur Naturkunde. Serie B (Geologie und Paläontologie) 198: 1–65
- Bolton, B. (1995), "A taxonomic and zoogeographical census of the extant ant taxa (Hymenoptera: Formicidae).", Journal of Natural History 29: 1037–1056
- Bolton, B. (2012) Barry Bolton's Synopsis of the Formicidae and Catalogue of Ants of the World. Version: 1 January 2012.
- Brady, S.G., Schultz, T.R., Fisher, B.L. & Ward, P.S. (2006). Evaluating alternative hypotheses for the early evolution and diversification of ants. Proceedings of the National Academy of Sciences of the United States of America, 103, 18172–18177.
- Chen, X.; MacGown, J. A.; Adams, B. J.; Parys, K. A.; Strecker, R. M.; Hooper-Bui, L. (2012), "First Record of Pyramica epinotalis (Hymenoptera: Formicidae) for the United States", Psyche: A Journal of Entomology 2012: 1, doi:10.1155/2012/850893
- Feitosa, R. M.; Brandão, C. R. F.; Dietz, B. H. (2007), "Basiceros scambognathus (Brown, 1949) n. Comb., with the first worker and male descriptions, and a revised generic diagnosis (Hymenoptera: Formicidae: Myrmicinae)", Papéis Avulsos de Zoologia (São Paulo) 47 (2): 31–42, doi:10.1590/S0031-10492007000200001
- Longino, J. T. (2013), "A revision of the ant genus Octostruma Forel 1912 (Hymenoptera, Formicidae)", Zootaxa 3699: 1–61, doi:10.11646/zootaxa.3699.1.1
- Ulysséa, Mônica Antune; Brandão, Carlos R.F. (2013), "Catalogue of Dacetini and Solenopsidini ant type specimens (Hymenoptera, Formicidae, Myrmicinae) deposited in the Museu de Zoologia da Universidade de São Paulo, Brazil", Papéis Avulsos de Zoologia (São Paulo) 53 (14): 187–209, doi:10.1590/S0031-10492013001400001
To request an improvement, please leave a comment on the page. Thank you!