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USA (Texas) to Colombia. Costa Rica: northwestern lowlands.
Temnothorax subditivus occurs in seasonally dry habitats. It inhabits scrubby vegetation and roadsides, nesting in small dead twigs or other dead plant cavities. Colonies are monogynous.
I have collected this species four times in Costa Rica, as follows:
Santa Rosa National Park, ridge between Playa Naranjo and Nancite: xeric scrub on rocky ridge; nest in dead branch; branch was dry and brittle.
Road from PanAmerican Highway to Monteverde, La Pita to Guacimal (below 500m elevation): three different collections from scrubby roadside vegetation, sweep samples and strays from tree trunks.
I also have collected the species in the Santa Marta region of Colombia. I found a small, monogynous colony under loose bark on a 2-3cm dia dead branch. The area of the nest was no more than 1x2cm. Crematogaster carinata were nesting throughout the same dead branch.
Within Costa Rica there is variation in the strength of sculpture on the face and mesosoma. At the two extremes of variation the face may have a broad medial and posterior shiny portion, or it may be almost entirely punctatorugose.
Found most commonly in these habitats: 6 times found in tropical dry forest, 3 times found in oak maple woodland, 3 times found in live oak woodland, 3 times found in roadside vegetation, 1 times found in Pastures and scrubby second growth vegetation, 2 times found in cedar scrub, 1 times found in xeric scrub, 1 times found in hardwood forest, 1 times found in mesic woodland, 1 times found in 2º wet forest, ...
Found most commonly in these microhabitats: 10 times ex sifted leaf litter, 2 times dead branch, 3 times at bait, 1 times nest under bark flap on dead branch, 1 times nest in dead branch, 1 times trail foragers, 1 times sweeping vegetation, 1 times on tree trunk, 1 times on low vegetation, 1 times nest in dead stick, 1 times in dead stems Arundo donax, ...
Collected most commonly using these methods: 9 times Winkler, 2 times maxiWinkler, 3 times baiting, 1 times Colony Collection, 1 times sweep, 2 times direct collection, 1 times hand collected, 1 times lindgren funnel, 1 times pitfall, 1 times pyrethrum/insecticide fogging, 1 times Beating, ...
Elevations: collected from 10 - 3180 meters, 284 meters average
Type specimens: syntype of Temnothorax subditivus: casent0913003