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Eurhopalothrix procera has the double tooth row found in E. gravis and relatives. The double tooth row is visible on the La Selva queen and on the AntWeb image of a queen from the Philippines (Holotype of E. procera subdentatus [Donisthorpe, 1942], a junior synonym of E. procera). It is unknown whether other species in the procera group also have the double tooth row. Cursory examination of the three Old World species E. australis, E. dubia, and E. omnivaga showed that these species lack the double tooth row.
The labrum of the La Selva queen is elongate, triangular, with two small lobes at the apex. The labrum is visible on the image of the E. procera subdentatus holotype, and appears similar. The La Selva queen is smaller and with narrower head than other known E. procera queens. Brown and Kempf (1960) report worker HW 0.98–1.35 and CI 106–111, with queens being the same as or slightly larger than workers. The La Selva queen has HW 0.91 and CI 95.
Found most commonly in these habitats: 30 times found in Rainforest, 3 times found in montane rainforest, 1 times found in - leaf litter ~7cm deep, 2 times found in swamp forest, 3 times found in Partly cleared forest, 1 times found in Rainforest s.l., 1 times found in 1° rainforest, 1 times found in Eucalyptus woodland, 1 times found in exposed montane summit, 1 times found in Lowland Rainforest, ...
Found most commonly in these microhabitats: 3 times 1 square meter of sifted leaf litter, 5 times litter, 1 times foraging on mossy tree trunk, 2 times sifted litter (leaf mold, rotten wood), 2 times sifted leaf litter, 2 times on old ivory nut, 1 times hand collected from 1 sq m sifted leaf litter, 2 times ex. rotting wood, 1 times ex rotten log near termites, 1 times ex rotten log, 1 times ex moss, ...
Collected most commonly using these methods: 10 times Winkler, 4 times hand collected, 7 times Berlesate, 2 times search, 2 times hand, 1 times berlesate ANIC No.648, 1 times direct collection, 1 times flight trap, 1 times hand collection, 1 times malaise trap/ethanol, 1 times Pyrethrum knockdown, ...
Elevations: collected from 17 - 1640 meters, 462 meters average
Type specimens: Holotype of Rhopalothrix subdentatus: casent0900934; syntype of Eurhopalothrix procera: casent0904971; syntype of Rhopalothrix kokodensis: casent0900931, casent0900932; syntype of Rhopalothrix procera: casent0916633; syntype of Rhopalothrix procera malua: casent0900930; syntype of Rhopalothrix procera samoana: casent0900933; syntype of Rhopalothrix procera ballionii: casent0909349; syntype of Rhopalothrix procera malua: casent0904972; syntype of Rhopalothrix procera samoana: casent0912538; type of Rhopalothrix angulinodis: focol2179