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Species: Adelomyrmex longinoi   Fernández, 2003 

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Taxonomic History (provided by Barry Bolton, 2015)

Adelomyrmex longinoi Fernández, 2003B PDF: 21 (w.q.) COSTA RICA. Neotropic. AntCat AntWiki


Costa Rica (type locality), Mexico (Fernandez and MacKay 2003, Fernandez 2003). Costa Rica: rainforests of Atlantic and southern Pacific lowlands, below 500m elevation.


Natural History:

Inhabits forest floor litter. Known only from Winkler samples.


Fernandez (2003) lists among the paratypes of this species a collection of mine, JTL2339-s, a Winkler sample from Estacion Cacao at 1500m. My records of material from this collection include only Adelomyrmex laevigatus and tristani. This may be an error in the publication. All other records suggest A. longinoi is a lowland species, and it would be unlikely to find it at the 1500m Cacao site.


Fern‡ndez C., F. 2003. Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae). Zootaxa 361: 1Ð52.

Fern‡ndez C., F., MacKay, W.P. 2003. The myrmicine ants of the Adelomyrmex laevigatus species complex (Hymenoptera: Formicidae). Sociobiology 41:593Ð604.

Taxonomic Treatment (provided by Plazi)

Fernández, F., 2003:
Worker measurements. 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).
Worker diagnosis. 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.
Queen measurements. 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.
Comments. The Mexican workers differ slightly from the Costa Rican ones. The head sculpturing is rugulate to rugo-reticulate posteriorly. The apical and subapical teeth on the masticatory margin are bigger than the basal and sub-basal teeth, and the promesonotum of the queen is smooth and shining (sculptured in Costa Rican queen). However, I consider these differences to be geographical variation, not worthy of species status. New collections in the areas between Mexico and Costa Rica (including queens and males) may clarify whether or not we are dealing with more than one species.

Specimen Habitat Summary

Found most commonly in these habitats: 22 times found in mature wet forest, 15 times found in tropical rainforest, 11 times found in tropical wet forest, 2 times found in ridgetop cloud forest, 1 times found in CES, 2 times found in wet forest, 4 times found in montane wet forest, 4 times found in 2º tropical rainforest, 3 times found in 2º lowland rainforest, 1 times found in lowland rainforest, ...

Collected most commonly using these methods or in the following microhabitats: 49 times miniWinkler, 10 times winkler, 12 times MaxiWinkler, 3 times Mini Winkler, 2 times search, 1 times Berlese, 1 times flight intercept trap

Elevations: collected from 5 - 1120 meters, 333 meters average

Type specimens: holotype Adelomyrmex longinoi: inbiocri002720661; paratype Adelomyrmex longinoi: inbiocri002720662; paratype longinoi: inbiocri001279878, inbiocri001279880, inbiocri001281613, inbiocri002719863, inbiocri002720020, inbiocri002720659, inbiocri002720660, inbiocri002720663; paratype of Adelomyrmex longinoi: inbiocri001281612

(-1 examples)

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