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Two sympatric species occur in the Semliki forest area of western Uganda, both of which key to P. weissi. In one, the worker is smaller, has a weakly impressed metanotal groove, and occurs in Winkler samples. Workers of the other are larger, with strongly impressed metanotal groove, and were found in soil beneath stones. Reevaluation will be necessary for the forms currently synonymized under this species.
Found most commonly in these habitats: 21 times found in rainforest, 2 times found in remnant ravine forest, 2 times found in Shade coffee, 1 times found in mature swamp forest, 3 times found in moist evergreen forest, 3 times found in rainforest edge, forest clearing, 1 times found in Coffee Plantation, 1 times found in rainforest and rainforest edge.
Found most commonly in these microhabitats: 11 times sifted litter (leaf mold, rotten wood), 5 times under stone, 4 times sifted litter, 4 times ex rotten log, 3 times ex soil, 1 times ex sifted leaf litter, 1 times under rootmat, 1 times ground forager(s), 1 times ex sifted litter & debris between tree buttresses.
Collected most commonly using these methods: 10 times MW 50 sample transect, 5m, 2 times search, 3 times Pitfall, Baits, Litter sieving/Winkler, Aspirator, 1 times Winkler, 1 times 10 Maxi Winkler, mixed sample, 1 times 14 Maxi Winkler, mixed sample, 1 times 15 Maxi Winkler, mixed sample.
Elevations: collected from 40 - 1800 meters, 827 meters average
Type specimens: syntype of Paraparatrechina weissi: casent0912328, casent0912329; syntype of Pseudolasius bayonii: casent0912317; syntype of Pseudolasius gowdeyi: casent0912320; syntype of Pseudolasius weissi sordida: casent0912330