Adelomyrmex mackayi

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Adelomyrmex mackayi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Adelomyrmex
Species: A. mackayi
Binomial name
Adelomyrmex mackayi
Fernández, 2003

Adelomyrmex mackayi casent0611137 p 1 high.jpg

Adelomyrmex mackayi casent0611137 d 1 high.jpg

Specimen Labels

This species is now known from one area in north central Chiapas and two sites in central Guatemala. The three sites are high montane cloud forest between 1900 and 2100 m elevation. It is clearly a high elevation specialist. At Biotopo El Quetzal in Guatemala, the cloud forest on the slopes around 1700 m were dominated by Adelomyrmex robustus and Adelomyrmex paratristani. Adelomyrmex mackayi was only found by hiking up to the ridge crests at 2000 m. Adelomyrmex mackayi is in danger of mountain-top extinction resulting from climate change. (Longino 2012)


Adelomyrmex mackayi is immediately recognizable by being sharply bicolored, with dark head and mesosoma and light yellow brown gaster. Such sharply contrasting coloration is unique in the genus. (Longino 2012)

Keys including this Species


Latitudinal Distribution Pattern

Latitudinal Range: 17.1833° to 17.1755°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Guatemala, Mexico (type locality).

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.



Males have yet to be collected.


Images from AntWeb

Adelomyrmex mackayi jtlc000014317 h 1 high.jpgAdelomyrmex mackayi jtlc000014317 p 1 high.jpgAdelomyrmex mackayi jtlc000014317 d 1 high.jpgAdelomyrmex mackayi jtlc000014317 l 1 high.jpg
Queen (alate/dealate). Specimen code jtlc000014317. Photographer Jeremy Pilllow, uploaded by University of Utah. Owned by JTLC.


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

  • mackayi. Adelomyrmex mackayi Fernández, 2003b: 22 (w.) MEXICO (Chiapas).
    • Longino, 2012: 20 (q.).
    • Status as species: Branstetter & Sáenz, 2012: 257; Longino, 2012: 20.

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



Measurements. Holotype. HL 0.69 HW 0.59 SL 0.43 EL 0.06 WL 0.66 GL 0.84 TL 2.78 CI 86 SI 73.

Mandibles with 5 teeth decreasing in size from apical teeth. Clypeal carinae not prolongued into frontal carinae. Eyes small, with approximately 5–6 ommatidia. Hypostomal tooth small, sharp pointed. Promesonotum evenly convex. Metanotal groove deep, distinct. Propodeal spines short, notably wider than higher. Head, pronotum and mesonotum coarsely reticulate-rugose. Transverse rugae between propodeal spines. Petiole and postpetiole smooth and shining with a few carinae in the sides. Mandibles smooth with longitudinal rugae feebly marked on outer half. Mandibles, legs and gaster smooth and shining. Hairs yellowish, long and flexuous on the body, more short and appressed on antennae and legs. Body brown, antennae, legs and gaster brown-yellowish.


Longino (2012) - Similar to worker except for queen-specific characters of large compound eyes, ocelli, and enlarged mesosoma with queen-typical sclerites; pronotum smooth medially, reticulate rugose laterally; dorsal mesonotum smooth and shining anteriorly and on median strip, longitudinally rugulose posterolaterally; scutellum longitudinally rugose; katepisternum smooth and shining; anepisternum smooth ventrally, rugose dorsally; side of propodeum rugose.

Type Material

Holotype worker: MEXICO: Chiapas, 2.1 km NW Pueblo Nuevo, Solistahuacán, Yerbabuena preserve, 2070 m, 23.ix.1992, R.S. Anderson No. 92-114 (Deposited in Museum of Comparative Zoology).


  • Fernández, F. 2003b. Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae). Zootaxa 361: 1-52 (page 22, worker, queen described)
  • Longino, J.T. 2012. A review of the ant genus Adelomyrmex Emery 1897 (Hymenoptera, Formicidae) in Central America. Zootaxa 3456, 1–35.

References based on Global Ant Biodiversity Informatics

  • Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology
  • Longino, J.T. 2010. Personal Communication. Longino Collection Database
  • Vásquez-Bolaños M. 2011. Lista de especies de hormigas (Hymenoptera: Formicidae) para México. Dugesiana 18: 95-133