Adelomyrmex silvestrii

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Adelomyrmex silvestrii
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Adelomyrmex
Species: A. silvestrii
Binomial name
Adelomyrmex silvestrii
(Menozzi, 1931)

Adelomyrmex silvestrii inbiocri001281616 profile 1.jpg

Adelomyrmex silvestrii inbiocri001281616 dorsal 1.jpg

Adelomyrmex silvestrii is perhaps the most easily identified Adelomyrmex species, and it is widespread and abundant. It occurs in a wide variety of habitats, mature to secondary, wet to seasonally dry, and sea level to 1700 m elevation cloud forest. It can occur in over 70% of quantitative miniWinkler samples. In spite of its abundance, a nest has never been reported. (Longino 2012)


Distinguished from other species of the genus by the shape of postpetiole and anterior emargination of the gaster.

Keys including this Species


northern Mexico (Tamaulipas) to Costa Rica.

Distribution based on Regional Taxon Lists

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

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



Males have yet to be collected.


The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • silvestrii. Apsychomyrmex silvestrii Menozzi, 1931b: 270, fig.6 (w.) COSTA RICA. Combination in Adelomyrmex: Kempf, 1972a: 18. See also: Fernández, 2003b: 28.

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



Fernández (2003) - (n=8). HL 0.56-0.57 HW 0.52-0.54 SL 0.36-0.38 EL 0.05-0.06 WL 0.50-0.55 GL 0.74-0.77 TL 2.30-2.35 CI 94 SI 71-72.

Sides of head evenly convex. Mandibles with 5 teeth decreasing in size from the apical teeth. Basal margin of the mandible with the tooth feebly developed. Dorsum of clypeal plate with two curved ridges very closed, prolongued into frontal carinae. Eyes small, with less than 10 facets, most with 5–6 facets. Hypostomal tooth small but clearly visible in frontal oblique view. Promesonotum slightly convex to flat, with strong transversal fringe on anterior pronotal margin. Metanotal groove weak. Propodeum sloping with two spines long, stout, directed backwards and nearly horizontal. Petiole stout in profile, with feebly concave posterior side, ventral face convex with several transverse rugae, appearing as serrations in profile. Postpetiole high, campaniform with a ventral transverse ridge toothlike as seen in profile. In dorsal view and lateral view, postpetiole extending posteriorly over basal gaster, as a blunt point. Gaster with emarginate base and humeral angles. Dorsal surface of head, pronotum and mesonotum with coarse, longitudinal rugulae. Transverse rugae between propodeal spines and sides of petiole and postpetiole. Declivity face of propodeum from smooth to covered with transverse rugae. Mandibles, clypeal plate, legs, petiole, postpetiole and gaster shining. Meso and hind tibia with some long hairs. Hairs yellowish, long and sparse (most hairs about 0125 mm long, as long as basal width of apical flagelomere), more short and apressed on antennae and legs. Body black to dark brown or dark reddish, antennae and legs more lighter, brown to yellowish.


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 mostly longitudinally rugose, weaker anteromedially; scutellum longitudinally rugose; katepisternum smooth and shining with thin strip of rugosity along posterior border; anepisternum and side of propodeum longitudinally rugose.


  • Fernández, F. 2003b. Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae). Zootaxa 361: 1-52 (page 28, figs. 13-18, 32, 73 worker described)
  • Kempf, W. W. 1972b. Catálogo abreviado das formigas da regia~o Neotropical. Stud. Entomol. 15: 3-344 (page 18, Combination in Adelomyrmex)
  • Longino, J.T. 2012. A review of the ant genus Adelomyrmex Emery 1897 (Hymenoptera, Formicidae) in Central America. Zootaxa 3456, 1–35.
  • Menozzi, C. 1931b. Contribuzione alla conoscenza del "microgenton" di Costa Rica. III. Hymenoptera - Formicidae. Boll. Lab. Zool. Gen. Agrar. R. Sc. Super. Agric. 25: 259-274 (page 270, fig. 6 worker described)