Strumigenys denticulata

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Strumigenys denticulata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. denticulata
Binomial name
Strumigenys denticulata
Mayr, 1887

Pyramica denticulata casent0178117 profile 1.jpg

Pyramica denticulata casent0178117 dorsal 1.jpg

Specimen labels


Collection records show this ant is typically sampled from litter samples in a variety of forest habitats. Brown (1962) noted it occurs in both primary and second-growth forest, in leaf litter; epiphytes and in termite nests.


Bolton (2000) - A member of the gundlachi complex in the Strumigenys gundlachi group. Of the five species immediately related to Strumigenys gundlachi, denticulata is easily diagnosed by its very long mandibles and extremely reduced postpetiolar appendages.

Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Argentina, Bolivia, Brazil (type locality), Colombia, Ecuador, French Guiana, Guyana, Panama, Paraguay, Peru, Suriname, Trinidad and Tobago, Venezuela.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb


DaRocha et al. (2015) studied the diversity of ants found in bromeliads of a single large tree of Erythrina, a common cocoa shade tree, at an agricultural research center in Ilhéus, Brazil. Forty-seven species of ants were found in 36 of 52 the bromeliads examined. Bromeliads with suspended soil and those that were larger had higher ant diversity. Strumigenys denticulata was found in a single bromeliad and was associated with the suspended soil and litter of the plant.

Brown (1960) - According to Weber (1952), this species occurs in both primary forest and second-growth, in leaf litter or in rotten twigs of low epiphytes. Kempf (1958) took it in humus, and Wasmann (1915) reports a sample taken in a nest of Anoplotermes in southeastern Brazil.




The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • denticulata. Strumigenys denticulata Mayr, 1887: 576 (w.) BRAZIL. Brown, 1960b: 47 (q.). Combination in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 118. Senior synonyn of aschnae, aschnakiranae: Bolton, Sosa-Calvo, et al. 2008: 62. See also: Bolton, 2000: 183.
  • aschnae. Pyramica aschnae Makhan, 2007a: 2, figs. 3, 4 (w.) SURINAM. Junior synonym of denticulata: Bolton, Sosa-Calvo, et al. 2008: 62.
  • aschnakiranae. Pyramica aschnakiranae Makhan, 2007a: 3, figs. 5, 6 (w.) SURINAM. Junior synonym of denticulata: Bolton, Sosa-Calvo, et al. 2008: 62.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Brown 1960 Fig 1-4

Many samples of denticulata have MI 72-77, but some have mandibles that are noticably longer, MI 81-85; sometimes individuals falling into both ranges occur in a single litter sample. A couple of workers from Narino Orito, Colombia (IAVH, BMNH) cloud the issue even further. They are very large and have exceptionally long mandibles and scapes (HL 0.55, HW 0.39, CI 71, ML 0.52, MI 94, SL 0.37, SI 95), falling well outside the range noted for this group. I cannot decide if this represents the presence of two or more sibling species or can be considered as normal variation within denticulata. A more detailed taxonomic investigation is needed to resolve this point.



TL 1.8-2.2, HL 0.42-0.48, HW 0.33-0.37, CI 76-80, ML 0.30-0.40, MI 72-85, SL 0.23-0.29, SI 68-81, PW 0.20-0.24, AL 0.40-0.48 (25 measured). Characters of gundlachi complex; see also notes under Strumigenys gundlachi. Inner margins of the long mandibles more or less straight to shallowly concave, with 5 - 10 preapical denticles on the distal half to two-thirds of the length. Spongiform appendages of postpetiole obsolete to absent: ventral lobe absent or at most represented only by a minute non-spongiform vestige; lateral lobe absent or at most represented by a very narrow carina. First gastral tergite very rarely smooth except for basigastral costulae, usually with superficial reticulate or shagreenate sculpture present near the base. Pair of erect hairs on mesonotum apparently always short and stiff.

Type Material

Syntype workers, BRAZIL: Santa Catarina (The Natural History Museum, Naturhistorisches Museum Wien, Vienna) (examined).


  • 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 “G. Doria” 99:1-191.
  • Bolton, B. 1999. Ant genera of the tribe Dacetonini (Hymenoptera: Formicidae). Journal of Natural History. 33:1639-1689. PDF (page 1673, Combination in Pyramica)
  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 183, fig. 133 worker described)
  • Brown, W. L., Jr. 1960c [1959]. The neotropical species of the ant genus Strumigenys Fr. Smith: group of gundlachi (Roger). Psyche (Camb.) 66: 37-52 (page 47, queen described)
  • Brown, W. L., Jr. 1962c. The neotropical species of the ant genus Strumigenys Fr. Smith: synopsis and keys to the species. Psyche. 69:238-267. PDF
  • Cuezzo, F. 1999. Nuevas citas de hormigas de las tribus Dacetini y Basicerotini (Hymenoptera: Formicidae) para la República Argentina. Rev. Soc. Entomol. Argent. 58(3/4): 209-210 (page 209, record Argentina)
  • DaRocha, W. D., S. P. Ribeiro, F. S. Neves, G. W. Fernandes, M. Leponce, and J. H. C. Delabie. 2015. How does bromeliad distribution structure the arboreal ant assemblage (Hymenoptera: Formicidae) on a single tree in a Brazilian Atlantic forest agroecosystem? Myrmecological News. 21:83-92.
  • Mayr, G. 1887. Südamerikanische Formiciden. Verh. K-K. Zool.-Bot. Ges. Wien 37: 511-632 (page 576, worker described)