Strumigenys hadrodens

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Strumigenys hadrodens
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. hadrodens
Binomial name
Strumigenys hadrodens
(Bolton, 2000)

Strumigenys hadrodens casent0900204 p 1 high.jpg

Strumigenys hadrodens casent0900204 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Strumigenys hadrodens.


Bolton (2000) - A member of the Strumigenys appretiata-group. P. hadrodens is recognised within the group by the following combination of characters: ventral spongiform lobe of postpetiole present but vestigial, represented only by a tiny anterior prominence on the sternite; apical half of first gastral tergite superficially reticulate; gaster without flexuous or flagellate hairs; dorsal alitrunk unsculptured; dorsum of petiole node not transversely rectangular, not reticulate-punctate; basigastral costulae obsolete.

Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • hadrodens. Pyramica hadrodens Bolton, 2000: 161 (w.) BRAZIL. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 120

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



Holotype. TL 2.1, HL 0.62, HW 0.58, CI 94, ML 0.11, MI 18, SL 0.23, SI 40, PW 0.28, AL 0.58. Pronotal humeral hair elongate, fine and flagellate. Mesonotum with a single pair of standing fine hairs. Dorsal surfaces of petiole, postpetiole and gaster with sparse short hairs that are simple, fine and erect. Dorsal alitrunk smooth, unsculptured except for faint vestiges on the propodeum. Declivity of propodeum with vestigial faint sculpture between the spines, but not reticulate-punctate. Dorsum of petiole node and disc of postpetiole unsculptured. Basigastral costulae almost absent, very short and inconspicuous, widely separated and restricted to extreme base of sclerite; not easily observed. Apical half of first gastral tergite with superficial reticular patterning. Propodeal spines elongate and narrowly triangular, much longer than their basal width. In profile the ventral surface of the petiole with a fine longitudinal carina, the lateral spongiform lobe small and very close to the posterior margin. Ventral spongiform lobe of postpetiole vestigial, represented only by a tiny prominence anteriorly on the sternite. Petiole node in dorsal view as long as broad or slightly longer than broad, the lateral spongiform lobe narrowly triangular and restricted to the posterolateral angle. Anterior margin of postpetiole disc twice broader than the posterior margin in dorsal view, the sides convergent posteriorly.

Paratypes. TL 2.0-2.3, HL 0.62-0.64, HW 0.56-0.60, CI 90-94, ML 0.11-0.13, MI 18-20, SL 0.23- 0.26, SI 40-46, PW 0.25-0.30, AL 0.54-0.60 (6 measured). As holotype but the faint sculpture between the propodeal spines may be effaced, leaving the entire declivity smooth. The reticular patterning on the first gastral tergite may also occur on the basal half. Many specimens have an accumulation of very fine silt around the base of the first gastral sternite that may obscure this area unless cleaned.

Type Material

Holotype worker, Brazil: Amazonas, Manaus, Porto Alegre, 25.ii.1994, #25 1 (R. Didham) (Instituto Nacional de Pesquisas da Amazonia). Paratypes. 2 workers with same data as holotype; 1 worker with same data but #258; 4 workers with same data but 20.ii.1994, #193; 3 workers with same data but 26.ii.1994, #451 (INPA , The Natural History Museum, Museum of Comparative Zoology).


  • 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. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028.28 (page 161, worker described)

References based on Global Ant Biodiversity Informatics

  • Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
  • Franco W., N. Ladino, J. H. C. Delabie, A. Dejean, J. Orivel, M. Fichaux, S. Groc, M. Leponce, and R. M. Feitosa. 2019. First checklist of the ants (Hymenoptera: Formicidae) of French Guiana. Zootaxa 4674(5): 509-543.
  • Groc S., J. H. C. Delabie, F. Fernandez, F. Petitclerc, B. Corbara, M. Leponce, R. Cereghino, and A. Dejean. 2017. Litter-dwelling ants as bioindicators to gauge the sustainability of small arboreal monocultures embedded in the Amazonian rainforest. Ecological Indicators 82: 43-49.
  • Groc S., J. H. C. Delabie, F. Fernandez, M. Leponce, J. Orivel, R. Silvestre, Heraldo L. Vasconcelos, and A. Dejean. 2013. Leaf-litter ant communities (Hymenoptera: Formicidae) in a pristine Guianese rainforest: stable functional structure versus high species turnover. Myrmecological News 19: 43-51.