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Species: Pseudomyrmex ejectus   (Smith, 1858) 

Download Data

Taxonomic History (provided by Barry Bolton, 2018)

Pseudomyrma ejecta Smith, 1858a PDF: 157 (w.) "PROBABLY BRAZIL". Neotropic. AntCat AntWiki HOL

Taxonomic history

Emery, 1894d PDF: 147 (q.).
Combination in Pseudomyrmex: Kempf, 1972b PDF: 217.
Senior synonym of Pseudomyrmex lincecumii: Ward, 1989a PDF: 436.
See also: Ward, 1985b PDF: 232.


   (According to curated Geolocale/Taxon lists)
Nearctic Region: United States
Neotropical Region: Belize, Bolivia, Brazil, Costa Rica, El Salvador, Guatemala, Honduras, Jamaica, Mexico

Distribution Notes:

Southeastern United States to Costa Rica; Jamaica.


P. ejectus nests in dead twigs or stalks of woody and herbaceous plants. Collections have been made from the following plant genera: Carya, Cladium, Conostegia, Prosopis, Quercus, Rhus, Spilanthes, Vernonia, and Vitis. In southeastern United States alates have been collected in the months of March, June, July, and September. Three out of five nests which Ward (1985) dissected (from Florida, Texas, and Mexico) contained a single dealate female; the other two nests were queenless. In Florida some nests of this species are polygynous (R. W. Klein, pers. comm.).


  • standing pilosity sparse, absent from mesonotum and propodeum
  • head and gaster usually dark brown
  • metanotal groove deep, wide
  • dorsal face of propodeum shorter than declivitous face
  • petiole and postpetiole slender (PVVI 0.40-0.52; PPVVI 0.93-1.25)

Taxonomic Notes:

The types of P. ejectus are labeled as coming from "Brazil?", but this is almost certainly a case of mislabeling.


Ward, P. S. 1985. The Nearctic species of the genus Pseudomyrmex (Hymenoptera: Formicidae). Quaestiones Entomologicae 21: 209-246.

Specimen Habitat Summary

Found most commonly in these habitats: 7 times found in montane wet forest, 4 times found in 2nd growth forest, 3 times found in mesophil forest, 3 times found in tropical wet forest, 3 times found in riparian woodland, 0 times found in in red mangrove, 3 times found in forest/pasture edge, montane wet forest, 3 times found in montane rainforest edge, 1 times found in Oak Hammock, 1 times found in pine flatwoods, ...

Found most commonly in these microhabitats: 10 times beating vegetation, 4 times beating veg., 1 times in dead grape vine, 1 times foragers in treefall, 3 times Sobre Vegetacion, 1 times ex dead twig of baccharis, 0 times black light, 2 times in dead stem Cephalanthus, 1 times at bait, 2 times foraging, 0 times ex low branch Carya floridana, ...

Collected most commonly using these methods: 18 times search, 13 times Beating, 3 times sweep net, 6 times sweeping, 0 times direct collection, 4 times Malaise, 0 times black light, 1 times baiting, 1 times beating vegetation, 1 times beating vegetation (1 hour), 1 times pan trap, ...

Elevations: collected from 3 - 1580 meters, 530 meters average

Type specimens: Lectotype of Pseudomyrmex ejectus: casent0902894

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