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|Cole, 1968: 94 (m.); Wheeler & Wheeler, 1953a PDF: 110 (l.); Taber et al., 1988 PDF: 51 (k.); Taber & Francke, 1986 PDF: 274 (gynandromorph).|
|Senior synonym of Pogonomyrmex opaciceps, Pogonomyrmex seminigra: Mayr, 1886d PDF: 449; Forel, 1886b PDF: xlii; of Pogonomyrmex ruthveni: Olsen, 1934 PDF: 507; of Pogonomyrmex utahensis: Cole, 1968: 95.|
Found most commonly in these habitats: 8 times found in desert, 27 times found in Short grass prairie, 26 times found in Pinyon-cedar woodland, 17 times found in Sagebrush, 8 times found in Mixed grass prairie, 3 times found in desert riparian, 6 times found in Meadow, 6 times found in Short Grass Prarie, 2 times found in sagebrush scrub, 2 times found in juniper/pinyon woodland, ...
Found most commonly in these microhabitats: 4 times under stone, 2 times ground forager(s), 6 times pebble mound nest, 2 times crater nest in soil, 3 times foragers, 4 times pebble mound, 4 times under rock, 1 times beating vegetation, 1 times in sedum, willow litter, 3 times roadside, 3 times Mound nest, ...
Collected most commonly using these methods: 33 times search, 6 times hand collecting, 3 times hand collected, 30 am 3 Jul 2016 and picked up 9 times transect of 5 ethylene glycol pitfall traps (28 mm internal diameter), set out 10, 0 times Berlese, 1 times observation.
Elevations: collected from 122 - 2743 meters, 1699 meters average
Type specimens: syntype of Pogonomyrmex occidentalis utahensis: casent0913099; syntype of Pogonomyrmex opaciceps: casent0904111; Type series: fmnhins0000077018, fmnhins0000083023, fmnhins0000083024, fmnhins0000083025