Acanthostichus concavinodis

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Acanthostichus concavinodis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dorylinae
Genus: Acanthostichus
Species: A. concavinodis
Binomial name
Acanthostichus concavinodis
Mackay, W.P., 1996

Nothing is known about the biology of Acanthostichus concavinodis. The type material was collected as part of the Mulford Biological Expedition.


A member of the serratulus species complex. Mackay (1996) - This species is easily separated from all others in the species complex by the shape of the anterior face of the petiole, which is similar in form to species in the breviscapus species complex. In addition the carinae along the sides of the petiole are especially obvious, forming darker margins when viewed from above (Fig. 21). Other than the shape of the petiole, it has all of the characteristics of the serratulus species complex.

Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia (type locality), Peru.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.

Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.



Known only from the worker caste.


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

  • concavinodis. Acanthostichus concavinodis Mackay, 1996: 147, fig. 21 (w.) BOLIVIA.
    • Type-material: holotype worker, 2 paratype workers.
    • Type-locality: holotype Bolivia: Ivon Beni, ii.1922, Mulford Biological Expd. (W.M. Mann); paratypes with same data.
    • Type-depositories: USNM (holotype); MZSP, WEMC (paratypes).
    • Status as species: Bezděčková, et al. 2015: 109.
    • Distribution: Bolivia, Peru.

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



Mackay 1996. Figures 11-33.

HL 0.94-1.19, HW 0.85-1.10, SL 0.49-0.60, SW 0.18-0.21, EL 0.04-0.05, WL 1.19-1.41, PW 0.41-0.54, PL 0.43-0.49, SI 51-52, CI 93-110, PI 91-103, SL/SW 2.79-2.82.

Mandibles without teeth or denticles; anterior border of clypeus slightly indented, with blunt tooth or rounded swelling offset to one side or other, lateral clypeal teeth poorly developed; vertex moderately convex; sides of head nearly parallel; eyes tiny; scape concave on anterior border; mesosoma as in other species; propodeum with concave posterior face; petiolar node about as long as broad (measured from middle of anterior border and disregarding longer lateral margins), anterior petiolar face strongly concave (Fig. 21), posterior face as in other species, subpetiolar process as in other species, with posteriorly directed tooth; gaster as in other species. Erect hairs abundant on all surfaces; decumbent pubescence absent except for a few scattered decumbent hairs on gaster. Sculpture polished and shiny. Color clear golden reddish brown.

Type Material

Holotype worker (National Museum of Natural History) and two paratype workers (William and Emma Mackay Collection, Museu de Zoologia da Universidade de Sao Paulo), BOLNIA: Ivon Beni, Wm. M. Mann, Feb. 1922.


From Latin, concavus meaning curved inward, nodus referring to the node, describing the shape of the anterior face of the petiole.


References based on Global Ant Biodiversity Informatics

  • Bezdeckova K., P. Bedecka, and I. Machar. 2015. A checklist of the ants (Hymenoptera: Formicidae) of Peru. Zootaxa 4020 (1): 101–133.
  • Esteves F. A., C. R. F. Brandao, and L. P. Prado. 2011. The type specimens of Dorylomorph ants (Hymenoptera, Formicidae: Aenictinae, Ecitoninae, Cerapachyinae, Leptanilloidinae) deposited in the Museu de Zoologia da Universidade de Sao Paulo, Brazil. Papeis Avulsos de Zoologia 51(22): 341-397.
  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
  • MacKay W. P. 1996. A revision of the ant genus Acanthostichus (Hymenoptera: Formicidae). Sociobiology 27: 129-179