Poneracantha mediatrix

AntWiki: The Ants --- Online
Poneracantha mediatrix
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Poneracantha
Species: P. mediatrix
Binomial name
Poneracantha mediatrix
(Brown, 1958)

Gnamptogenys mediatrix P casent0281839.jpg

Gnamptogenys mediatrix D casent0281839.jpg

Specimen Label

Apparently of lowland forests, one series taken from a varzea habitat. Its morphology puts it within the rastrata group, and it is quite probably a millipede hunter.

Identification

A member of the banksi complex (in the banksi subgroup of the rastrata species group). Mandibles elongate and triangular, their basal 2/3 rugulose and a pical 1/3 smooth and shining; clypeal lamella medianly concave; scapes with no erect hairs; petiolar costulation mostly transverse, node broader than long; metacoxal teeth very slender, propodeal teeth short. Rarely collected, it is a close relative of Poneracantha laticephala. (Lattke 1995)

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: -0.631944444° to -22.908°.

 
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality), Ecuador.

Distribution based on AntMaps

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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.
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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.
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Biology

Castes

Nomenclature

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

  • mediatrix. Gnamptogenys mediatrix Brown, 1958g: 326, fig. 15 (w.q.) BRAZIL (Pará, Rio de Janeiro).
    • Type-material: holotype worker, 5 paratype workers, 1 paratype queen.
    • Type-locality: holotype Brazil: Pará, Belém (F. Baker); paratypes: 1 worker with same data, 3 workers Rio de Janeiro (no collector’s name), 1 worker Rio de Janeiro, Jardim Botanico (H. Souza), 1 queen Rio de Janeiro, Engenho Novo (C.R. Gonçalves).
    • Type-depositories: MCZC (holotype); MCZC, MZSP (paratypes).
    • Combination in Poneracantha: Camacho, Franco, Branstetter, et al. 2022: 11.
    • Status as species: Kempf, 1972a: 113; Bolton, 1995b: 209; Lattke, 1995: 175; Lattke, et al. 2007: 261 (in key); Feitosa, 2015c: 98; Camacho, et al. 2020: 459 (in key); Camacho, Franco, Branstetter, et al. 2022: 11.
    • Distribution: Brazil, Ecuador.

Description

References

References based on Global Ant Biodiversity Informatics

  • Dias N. D. S., R. Zanetti, M. S. Santos, M. F. Gomes, V. Peñaflor, S. M. F. Broglio, and J. H. C. Delabie. 2012. The impact of coffee and pasture agriculture on predatory and omnivorous leaf-litter ants. Journal of Insect Science 13:29. Available online: http://www.insectscience.org/13.29
  • Dias N. S., R. Zanetti, M. S. Santos, J. Louzada, and J. H. C. Delabie. 2008. Interaction between forest fragments and adjacent coffee and pasture agroecosystems: responses of the ant communities (Hymenoptera, Formicidae). Iheringia, Sér. Zool., Porto Alegre, 98(1): 136-142.
  • Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
  • Miranda P. N., F. B. Baccaro, E. F. Morato, M. A. Oliveira. J. H. C. Delabie. 2017. Limited effects of low-intensity forest management on ant assemblages in southwestern Amazonian forests. Biodivers. Conserv. DOI 10.1007/s10531-017-1368-y
  • Nascimento Santos M., J. H. C. Delabie, and J. M. Queiroz. 2019. Biodiversity conservation in urban parks: a study of ground-dwelling ants (Hymenoptera: Formicidae) in Rio de Janeiro City. Urban Ecosystems https://doi.org/10.1007/s11252-019-00872-8
  • Silva R.R., and C. R. F. Brandao. 2014. Ecosystem-Wide Morphological Structure of Leaf-Litter Ant Communities along a Tropical Latitudinal Gradient. PLoSONE 9(3): e93049. doi:10.1371/journal.pone.0093049
  • Souza J. L. P., C. A. R. Moura, A. Y. Harada, and E. Franklin. 2007. Diversity of species of the genera Crematogaster, Gnamptogenys and Pachycondyla, (Hymenoptera: Formicidae) and complementarity of sampling methods during the dry season in an ecological station in the Brazilian state of Pará. Acta Amazonica 37(4): 649-656.