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Species: Myrmecocystus testaceus   Emery, 1893 

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Taxonomic History (provided by Barry Bolton, 2019)

Myrmecocystus melliger var. testaceus Emery, 1893k PDF: 667 (w.) U.S.A. Nearctic. AntCat AntWiki HOL

Taxonomic history

Snelling, 1976 PDF: 136 (q.m.).
Revived from synonymy, raised to species and senior synonym of Myrmecocystus mojave: Snelling, 1969b PDF: 6.


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Mexico, United States
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Distribution Notes:


Taxonomic Treatment (provided by Plazi)

Specimen Habitat Summary

Found most commonly in these habitats: 5 times found in chaparral, 2 times found in desert grassland, 1 times found in chapparal, 4 times found in sagebrush, 2 times found in shrub steppe, 1 times found in Pebbly sage wash, 1 times found in pine/oak woods and open sage areas, 2 times found in Pinyon-cedar woodland, 1 times found in pinyon/juniper woodland, 1 times found in oak woodland, ...

Found most commonly in these microhabitats: 2 times nest in soil, 1 times nest in rocky soil, 1 times crater nest in soil, 3 times crater nest, myrmecocystus actively foraging on surface times open sagebrush/bitterbrush. 2244, 1 times nest w pebble spread, 1 times nest under rock, 2 times ground nest with crater, 1 times ground nest wih mound ca. 20cm across, 2 times ground foragers, 2 times flat crater, ...

Collected most commonly using these methods: 7 times search, 4 times hand collecting, 2 times direct collection, 30 am 3 Jul 2016 and picked up 9 times transect of 5 ethylene glycol pitfall traps (28 mm internal diameter), set out 10, 1 times Applied water to the nest to bring several workers to the surface., 0 times Berlese, 1 times pitfall trap.

Elevations: collected from 40 - 2290 meters, 1476 meters average

Type specimens: syntype of Myrmecocystus testaceus: casent0905691

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