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Neivamyrmex pilosus (Smith)
Publication Data, Additional Information (status, external links, etc)
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: 488-489
publication ID 21290
link to original citation http://atbi.biosci.ohio-state.edu/HymOnline/reference-full.html?id=21290
treatment provided by Christiana
document name 21290
persistent identifier http://treatment.plazi.org/id/69748000-5FD9-2A91-6EB0-8D99520798D1
additional text versions Plain XML   TaxonX   RDF
scientific name Neivamyrmex pilosus (Smith)
external databases HNS
distribution map  

Neivamyrmex pilosus (F. Smith)HNS

Figures 13 a-b, 44, 59, 72, 86, 1110, 111, 121, 135, 146, 150, 151

Eciton pilosa F. SmithHNS, 1858: 151 (w). BRAZIL, Amazonas, Vila Nova (BMNH).

Eciton clavicornis NortonHNS, 1868: 46 (w). MEXICO, Vera Cruz, Hacienda Potrero (types lost?).

Eciton pilosumHNS: Mayr, 1865: 77; 1886: 120. Dalla Torre, 1893: 5.

Eciton (Labidus) subsulcatum MayrHNS, 1887: 440 (m). U. S. A., Texas (NHMV).

Eciton mexicanusHNS: Dalla Torre, 1893: 4. Forel, 1899: 27.

Eciton (Acamatus) pilosumHNS: Emery, 1894 a: 183. Emery, 1900 a: 524; Emery, 1910: 25. Borgmeier, 1923, 48. Borgmeier, 1934: 94. Wheeler, G. C., 1943: 331 (larva).

Eciton (Labidus) mexicanumHNS: Emery, 1895 b: 260. Emery, 1896 a: 33. Misidentification

Eciton pilosumHNS: Forel, 1899: 27. Wheeler & Long, 1901: 165.

Eciton (Acamatus) mexicanumHNS: Emery, 1900 a: 515, 525. Emery, 1910: 26. Wheeler, 1908: 414. M. R. Smith, 1931: 16.

Eciton aztecum ForelHNS, 1901: 49 (m). GUATEMALA, San Jose (MHNG).

Eciton (Acamatus) pilosumHNS: Wheeler, 1908: 412. Wheeler, 1921: 313. M. R. Smith, 1924: 85; M. R. Smith, 1931: 295. Reichensperger, 1939: 297 (q).

Eciton (Acamatus) pilosum var. angustius ForelHNS, 1909: 256 (w). PARAGUAY, San Bernardino (MHNG).

Emery, 1910: 25. Wheeler, 1921: 312. Eciton (Acamatus) mexicanum var. aztecaHNS: Emery, 1910: 26. Eciton (Acamatus) pilosum var. beebei WheelerHNS, 1921: 312 (w, m). GUYANA, Kartabo (MCZC). NEW

SYNONYMY. Eciton (Acamatus) pilosum var. aztecumHNS: Wheeler, 1921: 314. Eciton (Labidus) spininodis subsp. militarium SantschiHNS, 1929: 85 (w). PANAMA, Bocas del Toro,

Changuinola (BASEL). Borgmeier, 1953: 14. Eciton (Acamatus) porrectognathum BorgmeierHNS, 1933 b: 167 (m). BRAZIL, Rio de Janeiro, Angra dos

Reis u. Itatiaia (?). Eciton (Acamatus) pilosum var. mexicanumHNS: Borgmeier, 1936: 59. Borgmeier, 1939 a: 416.


Eciton (Neivamyrmex) pilosumHNS: M. R. Smith, 1942: 544. Creighton, 1950: 75.

Neivamyrmex pilosus porrectognathumHNS: Borgmeier, 1953: 5. BRAZIL, Angra dos Reis and Itatiaia (IBVB).

Neivamyrmex pilosus mexicanusHNS: Borgmeier, 1953: 17. Misidentification

Neivamyrmex pilosus beebeiHNS: Borgmeier, 1953: 19.

Neivamyrmex pilosusHNS: Borgmeier, 1955: 361 - 373 (w, q, m).

Neivamyrmex pilosus subsp. beebeiHNS: Borgmeier, 1955: 373 (w, m).

Neivamyrmex pilosus subsp. mexicanusHNS: Borgmeier, 1955: 374 (w, q, m). Watkins, 1976: 16. Watkins,

1982: 197 - 247. Watkins, 1985: 479 - 502. Misidentification


UNITED STATES: Arkansas and Mississippi west to southern Arizona; MEXICO: border states south to Chiapas; south to BRAZIL and PARAGUAY.


We have 56 records of this wide-ranging species in the United States.


The male type of Labidus mexicanusHNS, described from Orizaba, Mexico by F. Smith (1859), has been examined. It is a specimen of N. swainsonii (Shuckard)HNS, not a form of N. pilosusHNS. Accordingly, L. mexicanusHNS is removed to the synonymy of that species.

We have examined both males and workers from throughout the extensive range of this species. We have found that the features distinguishing the several recognized subspecies form a continuum from north to south, with no clear demarcation for any of these features. Accordingly, all these are here placed in synonymy.

Watkins (1985) indicated on his map of the distribution of N. pilosus mexicanusHNS that this ant had been collected from California. We have examined the specimens, purportedly collected at Exeter, Tulare County, and concur that they are N. pilosusHNS. However, it is our opinion that these males are probably incorrectly labeled and we have not included California within the distribution of N. pilosusHNS.

Automontage images of the worker caste (as N. pilosus mexicanusHNS) are located at antweb. org.

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