Gnamptogenys hartmani

AntWiki: The Ants --- Online
Gnamptogenys hartmani
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ectatomminae
Tribe: Ectatommini
Genus: Gnamptogenys
Species: G. hartmani
Binomial name
Gnamptogenys hartmani
(Wheeler, W.M., 1915)

Gnamptogenys hartmani casent0104773 profile 1.jpg

Gnamptogenys hartmani casent0104773 dorsal 1.jpg

Specimen Label


One record from soil in a banana farm and another from soil in a destroyed Trachymyrmex nest. These ants have on several occasions been reported as predators of Trachymyrmex ants (Echols, 1964:137; Kempf and Brown, 1968:94). J. Longino (pers. comm.) reports from Costa Rican field notes of Dana Myer: “a nest was found found in leaf litter amidst the remains of a Trachymrmex nest and many cut up workers and a queen of the attines were also found along with many wounded Gnamptogenys workers.” Longino has observed this species carrying its brood in a loose 3 m column, fleeing from raiding Eciton. One specimen was taken from the stomach contents of Dendrobates lecomelas. (Lattke 1995)


A member of the hartmoni complex (in the regularis subgroup of the mordax species group). Superolateral corners of declivitous propodeal face with small lobes or carinae; mandibles triangular to subtriangular; metanotal groove vaguely impressed and posterior nodal face has longitudinal costulae; metacoxal dorsum with lobes; subpetiolar process subquadrate. The study of specimens at hand show colors vary enough to make it an unreliable character for separating species and the same is true for irregularities in the sculpture. Specimens from more southern localities have finer costulation. Also found to vary continously was the length vs. width of the petiolar node, as well as other size indicators. (Lattke 1995)

Keys including this Species


In the United States this species has been collected only three times, twice in Texas (Walker and Brazos Counties) (Mackay and Vinson 1989) and once in Louisiana (Bienville Parish) (Echols 1964). The most reasonable explanation for the isolation of these records is that the species is subterranean and difficult to detect.

Latitudinal Distribution Pattern

Latitudinal Range: 32.255157° to -8.855°.

Tropical South

Distribution based on Regional Taxon Lists

Nearctic Region: United States (type locality).
Neotropical Region: Colombia, Costa Rica, Honduras, Mexico, Panama, 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.


Echols (1964) discovered four colonies in the nests of the fungus ant Trachymyrmex septentrionalis. The ants "had killed most or all of the Trachymyrmex workers, and were occupying the entire nest. Ten nearby nests of T. septentrionalis with deteriorating fungus gardens were devoid of workers and brood, presumably as a result of action by G. hartmani. However, there were many active unmolested nests in the area. The G. hartmani colonies were all observed on an area of about one acre." A captive nest fed on larvae of T. septentrionalis, and did not eat fungus from the garden or adult Trachymyrmex that were killed by stinging.

Flight Period

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Source: Kaspari et al., 2001.



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

  • hartmani. Ectatomma (Parectatomma) hartmani Wheeler, W.M. 1915b: 390 (w.) U.S.A. (Texas).
    • Type-material: holotype worker.
    • Type-locality: U.S.A.: Texas, Huntsville (C. Hartman).
    • Type-depository: MCZC.
    • Brown, 1961b: 69 (q.); Wheeler, G.C. & Wheeler, J. 1964b: 450 (l.).
    • Combination in Gnamptogenys: Brown, 1958g: 228; Camacho, Franco, Branstetter, et al. 2022: 11.
    • Status as species: Creighton, 1950a: 35; Smith, M.R. 1951a: 783; Brown, 1958g: 228, 302; Brown, 1961b: 69; Smith, M.R. 1967: 347; Kempf, 1972a: 112; Smith, D.R. 1979: 1337; Bolton, 1995b: 209; Lattke, 1995: 169; Lattke, et al. 2004: 346; Lattke, et al. 2007: 259, 262 (in key); Lattke, et al. 2008: 89; Bezděčková, et al. 2015: 111; Feitosa & Prada-Achiardi, 2019: 672; Camacho, et al. 2020: 457 (in key); Camacho, Franco, Branstetter, et al. 2022: 11.
    • Senior synonym of nigrifrons: Lattke, 1995: 169.
    • Senior synonym of turmalis: Lattke, 1995: 169.
    • Distribution: Argentina, Brazil, Colombia, Costa Rica, Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, Peru, U.S.A., Venezuela.
  • nigrifrons. Ectatomma (Gnamptogenys) nigrifrons Borgmeier, 1948a: 199, figs. 24, 25 (w.q.) PERU.
    • Type-material: 3 syntype workers, 1 syntype queen.
    • Type-locality: Peru: Valle Chanchamayo, 800 m., 1.viii.1939 (W. Weyrauch).
    • Type-depository: MZSP.
    • Combination in Gnamptogenys: Brown, 1958g: 228.
    • Status as species: Brown, 1958g: 228; Kempf, 1972a: 114; Bolton, 1995b: 210.
    • Junior synonym of hartmani: Lattke, 1995: 169.
  • turmalis. Gnamptogenys turmalis Kempf & Brown, 1968: 93 (w.) PANAMA (Barro Colorado I.).
    • Type-material: holotype worker, paratype workers (number not stated).
    • Type-locality: holotype Panama: Barro Colorado I., Snyder-Molino Trail, 8.i.1960 (E.S. McCluskey & W.L. Brown); paratypes: workers with same data, workers Barro Colorado I., Wheeler Trail, 22.iii.1967 (R.D. Akre).
    • Type-depositories: MCZC (holotype); CUIC, DZSP, MCZC, MZSP (paratype).
    • Status as species: Kempf, 1972a: 116; Bolton, 1995b: 211.
    • Junior synonym of hartmani: Lattke, 1995: 169.



References based on Global Ant Biodiversity Informatics

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  • INBio Collection (via Gbif)
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  • Kempf W. W., and W. L. Jr. Brown. 1968. Report on some Neotropical ant studies. Papeis Avulsos de Zoologia (São Paulo) 22: 89-102.
  • Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
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  • Longino J. et al. ADMAC project. Accessed on March 24th 2017 at
  • Longino, J.T. 2010. Personal Communication. Longino Collection Database
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