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
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- longinoi. Adelomyrmex longinoi Fernández, 2003b: 21 (w.q.) COSTA RICA.
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.
Holotype worker: COSTA RICA: Heredia, Est. Biol. La Selva, 10°26’N 84°01’W, 50–150m, 18.vi.1999, 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.
- Fernández, F. 2003b. Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae). Zootaxa 361: 1-52 (page 21, 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.