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Taxon | Status | Relationship Type |
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Formica rufa subsp. difficilis Emery | Original name/combination | member |
Formica rufa difficilis Emery | Subsequent name/combination | member |
Formica (Formica) difficilis Emery | Subsequent name/combination | member |
Formica difficilis var. consocians Wheeler | Original name/combination | |
Formica consocians Wheeler | Subsequent name/combination | |
Formica difficilis Emery | Subsequent name/combination | member |
Formica difficilis consocians Wheeler | Subsequent name/combination |
Citation | Annotation |
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Wheeler W. M., 1904: 371. | original description |
Emery C., 1925: 256. | cataloged, placed in subgenus Formica (Formica) |
Creighton W. S., 1950: 500. | junior synonym of Formica difficilis Emery |
Wheeler W. M., 1910: 570. | distribution |
Wheeler W. M., 1906: 16. | distribution |
Wheeler W. M., 1913: 395, 479. | description, keyed, placed in microgyna group, subgenus Formica (Formica), distribution |
Wheeler W. M., 1916: 577-601. | keyed, distribution |
Wheeler W. M., 1928: 10. | distribution |
Cole A. C., 1943: 389. | junior synonym of Formica difficilis Emery |
Smith M. R., 1947: 623. | included in list of species of microgyna group of Formica (Formica) of the United States |
Determiner(s) | # of Records |
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Collecting Method | # of Records |
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