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Species: Pseudomyrmex ejectus   (Smith, 1858) 

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See Also:

Pseudomyrmex ejectus_nr3, Pseudomyrmex ejectus_nr4, Pseudomyrmex ejectus_nr5

Taxonomic History (provided by Barry Bolton, 2019)

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.


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Belize, Brazil, Costa Rica, El Salvador, Guatemala, Honduras, Jamaica, Mexico, United States
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Nearctic, Neotropical

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: 8 times found in open maritime forest, 6 times found in montane rainforest edge, 7 times found in rainforest edge, 7 times found in montane wet forest, 6 times found in behind beach house, 4 times found in 2nd growth forest, 3 times found in tropical wet forest, 3 times found in riparian woodland, 3 times found in mesophil forest, 4 times found in at edge of bottomland hardwood forest and road, crawling on dead Quercus nigra, ...

Found most commonly in these microhabitats: 14 times on low vegetation, 10 times beating vegetation, 4 times beating veg., 3 times black light, 1 times in dead grape vine, 1 times foragers in treefall, 3 times Sobre Vegetacion, 1 times ex dead twig of baccharis, 1 times at bait, 2 times ex low branch Carya floridana, 2 times shrubs, ...

Collected most commonly using these methods: 18 times search, 13 times Beating, 10 times blacklight trap, 11 times boxtrap, 9 times Lindgren funnel, 9 times beating trees and shrubs, 7 times sweeping, 7 times Lindgren funnel baited with Typosan, 4 times sweep net, 5 times direct collection, 4 times beating vegetation (1 hour), ...

Elevations: collected from 3 - 1920 meters, 577 meters average

Type specimens: Lectotype of Pseudomyrmex ejectus: casent0902894

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