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Species: Neivamyrmex melanocephalus   (Emery, 1895) 

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Taxonomic History (provided by Barry Bolton, 2021)

Eciton melanocephalum Emery, 1895d PDF: 260 (footnote) (w.) MEXICO (Nayarit). Neotropic. Primary type information: Type-material: syntype workers (number not stated). Type-locality: Mexico: Nayarit, Tepic (T. Pergande). Type-depositories: MCZC, MHNG, MSNG, USNM. AntCat AntWiki HOL

Taxonomic history

Combination in Eciton (Acamatus): Emery, 1910b PDF: 24.
Combination in Eciton (Neivamyrmex): Smith, 1942c PDF: 549.
Combination in Neivamyrmex: Borgmeier, 1953 PDF: 6.
Status as species: Pergande, 1896 PDF: 874; Forel, 1899b PDF: 28; Emery, 1910b PDF: 24; Wheeler, 1914c PDF: 41; Smith, 1942c PDF: 549 (redescription); Creighton, 1950a PDF: 72; Smith, 1951c PDF: 780; Borgmeier, 1953 PDF: 19; Borgmeier, 1955 PDF: 385 (redescription); Smith, 1958c PDF: 109; Smith, 1967a PDF: 345; Watkins, 1971 PDF: 94 (in key); Kempf, 1972b PDF: 156; Watkins, 1972 PDF: 348 (in key); Hunt & Snelling, 1975 PDF: 21; Watkins, 1976 PDF: 16 (in key); Smith, 1979: 1331; Watkins, 1982 PDF: 210 (in key); Watkins, 1985 PDF: 481 (in key); Bolton, 1995b: 290; Mackay & Mackay, 2002 PDF: 59; Snelling & Snelling, 2007 PDF: 479; Branstetter & Sáenz, 2012 PDF: 254.
// Distribution


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

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Snelling, G. C. & Snelling, R. R., 2007, New synonymy, new species, new keys to Neivamyrmex army ants of the United States., Advances in ant systematics (Hymenoptera: Formicidae): Homage to E. O. Wilson - 50 years of contributions. (Memoirs of the American Entomological Institute 80), pp. 459-550

Neivamyrmex melanocephalus (Emery)HNS

Figures 28, 80

Eciton (Acamatus) melanocephalum EmeryHNS, 1895: 260 (w). MEXICO, Tepic (MHNG).

Eciton (Neivamyrmex) melanocephalumHNS: M. R. Smith, 1942: 549 (w) (part). Creighton, 1950: 72 (part).

Neivamyrmex melanocephalusHNS: Borgmeier, 1953: 19. Borgmeier, 1955: 385 - 387 (w).

Eciton (Acamatus) melanocephalum subsp. xipe WheelerHNS, 1914: 41; worker. MEXICO, Hidalgo, San Miguel (MCZC).


UNITED STATES: Arizona; MEXICO: south at least to Oaxaca and Morelos. SPECIMENS EXAMINED

UNITED STATES, ARIZONA: Santa Cruz Co.: Upper White Rock Campground GoogleMaps, Pena Blanca Lake GoogleMaps (31.39 ° N 111.08 ° W), 1200 m (GCSC, LACM) GoogleMaps; Nogales , on sidewalk (USNM).

MEXICO, OAXACA: 14.5 km S Ocotlan , 1500 m (GCSC, WPMC). MORELOS: La Luz Tetecala (WPMC).


This rather large distinctive species is only rarely encountered in the United States and its principal range lies in Mexico and Guatemala. As discussed above, we believe that N. mandibularisHNS is the likely male of N. melanocephalusHNS, but it is also possible that N. mandibularisHNS could be the opposite sex of N. graciellaeHNS.

One foraging raid of N. melanocephalusHNS was observed. It occurred in full daylight and the workers were taking a variety of small arthropods (B. V. Brown, pers. comm).

Specimen Habitat Summary

Found most commonly in these habitats: 3 times found in pine/oak forest, 1 times found in university campus, 2 times found in Acacia-oak woodland, 1 times found in oak-juniper woodland, 1 times found in xerophyl scrub, 1 times found in agricultural zone, 1 times found in oak/juniper woodland.

Found most commonly in these microhabitats: 2 times foraging raid, 1 times raiding columns, 1 times ground forager(s), 1 times under rock, 1 times on sidewalk, 1 times ground foragers, 1 times at light in room.

Collected most commonly using these methods: 3 times hand collecting, 1 times search, 2 times pitfall, 1 times at light, 1 times direct collection.

Elevations: collected from 1200 - 2290 meters, 1960 meters average

Collect Date Range: collected between 1947-12-09 and 2017-06-29

Type specimens: syntype of Eciton melanocephalum xipe: casent0902638; syntype of Neivamyrmex melanocephalus: casent0903725

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