Neivamyrmex swainsonii (Shuckard),

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: 489-490

publication ID

21290

persistent identifier

http://treatment.plazi.org/id/18BF1494-57C6-1A4C-1DEE-141554E7DFD5

treatment provided by

Christiana

scientific name

Neivamyrmex swainsonii (Shuckard)
status

 

Neivamyrmex swainsonii (Shuckard)  HNS 

Figures 15, 25, 30, 46, 73, 122, 136, 147, 149

Labidus swainsonii Shuckard  HNS  , 1840: 201 (m). BRAZIL ( BMNH). Westwood, 1842: 76. F. Smith, 1859: 8 (m). 

Labidus mexicanus F. Smith  HNS  , 1859: 7 (m). MEXICO, Orizaba ( BMNH) (examined). NEW SYNONYMY  .

Eciton (Acamatus) nitens  HNS  : Pergande, 1895: 874. Misidentification

Eciton (Acamatus) swainsonii  HNS  : Emery, 1900: 515, 525. Emery, 1910: 27. Santschi, 1916: 370. Santschi, 1931: 74. Gallardo, 1920: 379. Borgmeier, 1923: 50.

Eciton (Acamatus) arizonense Wheeler  HNS  , 1908 c: 414 (m). U. S. A., Arizona, Nogales. (MCZC). Emery 1910: 25. M. R. Smith, 1942: 581 (m)

Eciton (Acamatus) lieselaei  HNS  : Gallardo, 1920: fig. 32. Misidentification

Eciton (Neivamyrmex) swainsoni  HNS  : Borgmeier, 1948 b: 462.

Eciton (Neivamyrmex) arizonense  HNS  : Creighton, 1950: 69 - 70 (m).

Neivamyrmex swainsoni  HNS  : Borgmeier, 1953: 16. Borgmeier, 1955: 454 - 458 (m). Watkins, 1972: 352 (m). Watkins, 1976: 24 (m). Cokendolpher & Francke, 1990: 13.

Eciton (Neivamyrmex) commutatum  HNS  : M. R. Smith, 1942: 568 (misidentification).

Neivamyrmex swainsoni arizonensis  HNS  : Borgmeier, 1953: 19 (m).

Neivamyrmex fallax Borgmeier  HNS  , 1953: 48 (w). U. S. A., Texas, Victoria ( USNM). NEW SYNONYMY 

DISTRIBUTION (Map 11)

UNITED STATES: Kansas, Louisiana and Texas, west to California; MEXICO: border states south to Chiapas and Yucatan; south to ARGENTINA.

SPECIMENS EXAMINED

We have 123 records for this species in the United States.

DISCUSSION

F. Smith's Labidus mexicanus  HNS  was made a variety of pilosus  HNS  by Borgmeier (1936), a synonym of pilosus  HNS  by M. R. Smith (1942) and, finally, a subspecies of pilosus  HNS  by Borgmeier (1953), where it has remained. We have examined the type of L. mexicanus  HNS  and determined that none of the above decisions was correct. Labidus mexicanus F. Smith  HNS  is, instead, a junior synonym of N. swainsonii  HNS  (New synonymy).

Due to its large size and relative abundance N. swainsonii  HNS  is easily one of North America ’ s most conspicuous army ants. Surprisingly, for many years the worker form of this common and wideranging species was unknown. We have determined that N. fallax  HNS  is the worker of N. swainsonii  HNS  . The evidence for this association is scanty: it is based on a worker of N. fallax  HNS  found attached to the leg of a male collected in Arizona. Although throughout the United States and Mexico the ranges of these two taxa overlap nicely, N. fallax  HNS  is unknown south of Guatemala.

Differences do exist between the North and South American populations; however after having examining the type specimen from Brazil and several other specimens from Central and South America we are forced to conclude that we are dealing with a single wide ranging and slightly variable species.

Automontage images of the male caste may be viewed at antweb. org

BMNH

United Kingdom, London, The Natural History Museum [formerly British Museum (Natural History)]

BMNH

United Kingdom, London, The Natural History Museum [formerly British Museum (Natural History)]

USNM

USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]

USNM

USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]