Adelomyrmex longinoi

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

Adelomyrmex longinoi inbiocri001279879 profile 1.jpg

Adelomyrmex longinoi inbiocri001279879 dorsal 1.jpg

Specimen labels

This species occurs in mature wet forest leaf litter. It is most abundant in the lowlands but can occur as high as 1100 m elevation (Parque Nacional Azul Meambar, Honduras). The northern limit appears to be just across the Motagua fault in southeastern Guatemala. It is widespread in wet forests of Honduras and Nicaragua. In Costa Rica it occurs on both lowland Atlantic and southern Pacific slopes, but only to 500 m elevation. When present it is always a low-density element of the fauna, occurring in 1–10% of miniWinkler samples, and usually as one or two individuals per sample. (Longino 2012)


In the northern part of its range A. longinoi is sympatric with the closely similar Adelomyrmex marginodus, and the two species may occur together in the same Winkler samples. The anterior and dorsal faces of the pronotum are less sharply differentiated in A. longinoi, and the posterior margin of the postpetiole lacks a pronounced transverse rim. DNA barcoding evidence supports the distinctness of the two species. Fernández (2003) commented on Chiapas specimens tentatively identified as A. longinoi; these are almost certainly A. marginodus. (Longino 2012)

Keys including this Species


Latitudinal Distribution Pattern

Latitudinal Range: 18.5859972° to 8.406667°.

Tropical South

Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica (type locality), Guatemala, Honduras, Mexico, Nicaragua.

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.





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

  • longinoi. Adelomyrmex longinoi Fernández, 2003b: 21 (w.q.) COSTA RICA, MEXICO (Chiapas).
    • Status as species: Branstetter & Sáenz, 2012: 257; Longino, 2012: 19.

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



Holotype (Paratype). HL 0.49 (0.50) HW 0.40 (0.41) SL 0.26 (0.28) EL 0.025 (0.030) WL 0.42 (0.44) GL 0.56 (0.56) TL 1.72 (1.76) CI 83 (83) SI 64 (69).

Mandibles with 6 teeth, the three apical larger. Anterior margin of clypeal plate concave. Lateral clypeal teeth very reduced, smaller than median clypeal teeth. Eyes small, with 4 ommatidia. Hypostomal tooth small, inconspicuous. Promesonotum continuous, slightly convex and slightly higher than propodeum. Propodeal teeth triangular. Petiolar node narrow rounded above. Postpetiole with transverse carinae in their posterior face. Head rugoreticulated. Promesonotum irregularly rugose. Sides of pronotum, petiole and postpetiole rugoreticulated. Sides of mesosoma irregularly rugulose. Body red brown, appendages lighter.


Paratype. HW 0.60 HL 0.71 SL 0.44 EL 0.13 WL 0.75 GL 0.84 TL 2.90 CI 84 SI 73.

As worker, with the typical queen myrmicine traits. Promesonotum smooth and shining to sculptured. Sides of pronotum with oblique rugulae. Pilosty short, erect, moderately abundant.

Type Material

Holotype worker: COSTA RICA: Heredia, Est. Biol. La Selva, 10°26’N 84°01’W, 50–150m,, INBio-OET No. CRI002 720661 (Deposited in INBio).

Paratypes: MÉXICO: 2 w, Chiapas, Ruinas de Palenque, 4.ix.1974, E.M. & J.L. Fisher (Los Angeles County Museum of Natural History); COSTA RICA: 5 w, Heredia, Est. Biol. La Selva, 10°26’N 84°01’w, 50–150m, vi.1999, INBio-OET; 1 w, Heredia, 13 km SSW Puerto Viejo, 10°21’N 84°03’w, 300m, 17.vii.1986, J. Longino No. 1390-S; 1 w, Heredia, 5 km SW Puerto Viejo, 10°25’N 84°02’w, 100m, 15–21.vii.1986, J. Longino No. 1392-S; 1 w, Guanacaste, Cerro Cacao, 10°56’N 85°27’W, 1500m, 9–11.ii.1989, J. Longino No. 2339-S; 3 w, Puntarenas, 19 km S Ciudad Neily, 8°29’N 82°58’W, 20m, 25.iii.1990, J. Longino 2658- S; 1 w, Puntarenas, Res. Biol. Carara, 9°47’N 84°36’W, 30 m, 25–26.vii.1985, J. Longino No. 534-s. Five paratypes deposited in INBio and 9 paratypes deposited in Los Angeles County Museum of Natural History, Insect Collection, Instituto de Ciencias Naturales, Museu de Zoologia da Universidade de Sao Paulo, Instituto de Zoologia Agricola, The Natural History Museum.

Longino (2012) - The holotype of A. longinoi is currently missing. Queries have not located it at BMNH, IAVH, ICN, INBIO, LACM, MIZA, MZSP, USNM. However, abundant material from the type locality is available in museums, and multiple specimens exist from the same miniWinkler sample.


References based on Global Ant Biodiversity Informatics

  • Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology
  • Fernández, F. 2003. Revision of the myrmicinae ants of the Adelomyrmex genus-group. Zootaxa 361: 1-52.
  • Longino J. T. 2013. Ants of Nicargua. Consulted on 18 Jan 2013.
  • Longino J. T., and R. K. Colwell. 2011. Density compensation, species composition, and richness of ants on a neotropical elevational gradient. Ecosphere 2(3): 16pp.
  • Longino J. et al. ADMAC project. Accessed on March 24th 2017 at
  • 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