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|Combination in Camponotus (Myrmorhachis): Forel, 1914a PDF: 274; in Camponotus (Myrmocladoecus): Emery, 1925d PDF: 167; Wheeler, 1934e PDF: 424.|
Guatemala, Costa Rica. Costa Rica: throughout the country to about 1000m elevation.
This species seems to be most abundant in very open, insolated, relatively dessicating environments. It seems to be very common along coastlines; most of my collections are from beach margins and coastal strand vegetation, from both coasts. For example, during extensive collections in Corcovado National Park I found mucronatus almost exclusively along the beach, and not further inland in nearby secondgrowth vegetation. However, the species is not restricted to beach margins. I have collected it several times along the dry, dusty road to Monteverde, up to 900m elevation. At La Selva Biological Station, far from the coast, it is only moderately abundant. It is collected occasionally in canopy fogging samples, and I have collected nests in dead twigs from the high canopy and from low, open second growth vegetation.
Foragers are diurnal, and often visit extrafloral nectaries.
Nests are in dead wood, usually narrow-guage dead stems, but I have found nests in old fenceposts and in a Rhizophora stump. Along the road to Monteverde, I once found nests in two large, dead, woody nodes of Cordia alliodora. The entrance holes looked like they were originally made by Cephalotes setulifer (an obligate Cordia alliodora specialist that makes circular entrance holes in nodes) but by then were slightly irregular and elliptical. One node contained 12 workers, 2 alate queens, 7 males, and no brood. The second node contained 25 workers, 4 alate queens, 2 males, 1 dealate queen, and brood.
Emery, C. 1890. Studii sulle formiche della fauna neotropica. Bull. Soc. Entomol. Ital. 22:38-80.
Found most commonly in these habitats: 9 times found in Entre SHO y SSE, 7 times found in SSO 350m, 4 times found in montane wet forest, 3 times found in SSO 450m, 3 times found in 2º wet forest, 3 times found in Port of entry, 3 times found in 2º lowland rainforest, 2 times found in tropical wet forest, 1 times found in beach edge, Agricultural Land times found in Disturbed, ...
Collected most commonly using these methods or in the following microhabitats: 23 times Fogging, 6 times search, 6 times Beating, 4 times Malaise, 2 times Baiting, 1 times blacklight, 1 times prey ants from Eciton hamatum, 1 times Sweeping
Elevations: collected from 10 - 800 meters, 207 meters average