Taxonomic History (provided by Barry Bolton, 2019)
Distribution: Geographic regions
(According to curated Geolocale/Taxon lists): Americas: Argentina
, Costa Rica
, Saint Kitts and Nevis
, United States
, Venezuela Biogeographic regions
(According to curated Bioregion/Taxon lists): Nearctic
is a widely distributed and common species, occurring from Mexico to Argentina, with an outlying (and possibly introduced) population in Florida. The records of P. elongatus
from Texas (Ward, 1985) are in error: they refer to P. caeciliae
(see Ward, 1989).
is a generalist inhabitant of dead twigs of woody plants. It has been collected in mangroves, old fields, along roadsides, and in forested habitats ranging from tropical dry forest to secondary and primary rain forest. Specific nest-site records include dead twigs of Avicennia germinans
, Rhizophora mangle
, Laguncularia racemosa
, Baccharis halimifolia
, Baccharis trinervis
spp., Vernonia patens
, Terminalia catappa
, Tecoma stans
, Zanthoxylum culantrillo
, Gliricidia sepium
sp., and Sapium
sp. It has also been recorded nesting in live branches of Pithecellobium saman
, Cordia alliodora
, and Triplaris cumingiana
. Thus, it appears that P. elongatus
will occupy ant-plant domatia opportunistically.
Among members of the oculatus
group (see Ward, 1989), workers of elongatus
can be recognized by the
following combination of features:
- relatively small size (HW 0.56-0.68)
- head densely punctate and predominantly opaque
- eyes relatively long (REL 0.53-0.59; REL2 0.73-0.82)
- petiole relatively short (PLI 0.79-1.09), with rounded dorsolateral margination
is a common and widespread species whose key features are its relatively small size (HW 0.56-0.68); densely punctate and predominantly opaque head; long eyes (REL > 0.52, REL2 > 0.72); and relatively short, high petiole (PLI > 0.78).
Ward, P. S. 1985. The Nearctic species of the genus Pseudomyrmex (Hymenoptera: Formicidae). Quaestiones Entomologicae 21: 209-246.
Ward, P. S. 1989. Systematic studies on pseudomyrmecine ants: revision of the Pseudomyrmex oculatus and P. subtilissimus species groups, with taxonomic comments on other species. Quaestiones Entomologicae 25: 393-468.
Taxonomic Treatment (provided by Plazi)
Treatment Citation: Wild, A. L., 2007, A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)., Zootaxa 1622, pp. 1-55
elongatus (MayrHNS 1870a).
Canindeyú, Central, Ñeembucú, Pte. Hayes, San Pedro (ALWC, IFML, INBP).
Specimen Habitat Summary
Found most commonly in these habitats: 26 times found in red mangrove, 11 times found in tropical moist forest, 7 times found in 2º lowland rainforest, 8 times found in CC 1500 m., 2 times found in moist forest, 6 times found in rainforest edge, 4 times found in tropical dry forest, 5 times found in tropical rainforest, 5 times found in Tropical hardwood forest, 5 times found in SAT, ...
Found most commonly in these microhabitats: 18 times nest in twig above ground, 14 times beating vegetation, 15 times on low vegetation, 10 times Malaise trap, 9 times ex dead twig, 9 times copa de árbol, 4 times foraging on low vegetation, 1 times foragers on treefall, 3 times dead twig, 3 times in fresh treefall, 3 times strays, ...
Collected most commonly using these methods: 29 times Fogging, 18 times search, 16 times Beating, 14 times Malaise, 7 times direct collection, 5 times hand collecting, 00 times collected manually on live tree bole within Ft. Jefferson, 10, 3 times beating low vegetation, 3 times malaise trap, 2 times beating vegetation (15 minutes), 1 times beating vegetation (3 hour period), ...
Elevations: collected from 1 - 1240 meters, 236 meters average
Type specimens: Lectotype of Pseudomyrmex elongatus: casent0915840; syntype of Pseudomyrma elongata tandem: casent0907537
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