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|Cole, 1968: 94 (m.); Wheeler & Wheeler, 1953a PDF: 110 (l.); Taber, Cokendolpher & Francke, 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: 6 times found in desert, 5 times found in Short grass prairie, 0 times found in Pinyon-cedar woodland, 2 times found in Sagebrush, 1 times found in Mixed grass prairie, 3 times found in desert riparian, 2 times found in sagebrush scrub, 2 times found in juniper/pinyon woodland, 0 times found in Meadow, 0 times found in Short Grass Prarie, ...
Found most commonly in these microhabitats: 4 times under stone, 1 times ground forager(s), 6 times pebble mound nest, 2 times crater nest in soil, 3 times foragers, 3 times pebble mound, 1 times beating vegetation, 1 times nests and foragers on soil, 2 times nest in soil, 1 times hilltop disc nest, 1 times ground nest, ...
Collected most commonly using these methods: 31 times search, 6 times hand collecting, 2 times Under rock, 3 times hand collected, 1 times in sedum, 0 times Roadside, 0 times rabbit brush, 0 times Sandhills, 0 times Mound nest, 0 times Conical mound, 0 times on sunflower, ...
Elevations: collected from 122 - 2743 meters, 1700 meters average
Type specimens: syntype of Pogonomyrmex occidentalis utahensis: casent0913099; syntype of Pogonomyrmex opaciceps: casent0904111; Type series: fmnhins0000077018, fmnhins0000083023, fmnhins0000083024, fmnhins0000083025