Neivamyrmex halidaii

This species is only known from males and has yet to be associated with queens or workers.

Distribution
Mexico: Vera Cruz and Oaxaca to Chiapas (Watkins, 1982), south to Bolivia and northern Argentina. (Snelling and Snelling 2007)

Distribution based on Regional Taxon Lists
Nearctic Region: United States. Neotropical Region: Argentina, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Suriname, Trinidad and Tobago, Venezuela.

Biology
Jack Longino: This species is known only from males. At La Selva and the 300m site on the Barva transect most males have been collected at lights. Males have been collected in 15 different light trap samples. In an 18-month light trapping program, all males occurred from February to May, which is the dry season. One male was captured in a Malaise trap; given the intensity of Malaise trap sampling at La Selva, this is a very rare event. In Monteverde a male was found inside a house at night, apparently attracted to the light.

Nomenclature

 * . Labidus halidaii Shuckard, 1840a: 200 (m.) BRAZIL (São Paulo).
 * Type-material: syntype males (number not stated).
 * Type-locality: Brazil: St Paul (= São Paulo).
 * Type-depository: unknown (not in BMNH, OXUM, LSLC, or MVMA; presumed lost).
 * [Note: Shuckard recorded the syntypes as “in the collection of Capt. King R.N. and Mr Curtis”.]
 * [Misspelled as halidayi by Roger, 1863b: 42, Dalla Torre, 1893: 3, and many others.]
 * Combination in Eciton: Forel, 1895b: 119;
 * combination in E. (Acamatus): Emery, 1900a: 187;
 * combination in Neivamyrmex: Borgmeier, 1953: 13.
 * Status as species: Westwood, 1842: 76; Smith, F. 1859b: 8; Roger, 1863b: 42; Mayr, 1863: 424; Dalla Torre, 1893: 3; Forel, 1895b: 119; Forel, 1899c: 28; Emery, 1900a: 178 (in key); Forel, 1901h: 47; Emery, 1910b: 26; Forel, 1911c: 290; Forel, 1912c: 45; Santschi, 1916e: 368; Borgmeier, 1923: 45; Santschi, 1930e: 83; Borgmeier, 1953: 13; Borgmeier, 1955: 437 (redescription); Kempf, 1960e: 388; Kempf, 1972a: 155; Watkins, 1976: 28 (in key); Watkins, 1982: 212 (in key); Bolton, 1995b: 289; Palacio, 1999: 161 (in key); Wild, 2007b: 26; Snelling, G.C. & Snelling, 2007: 472; Branstetter & Sáenz, 2012: 254; Guénard & Economo, 2015: 226; Palacio, 2019: 620.
 * Senior synonym of amplipennis: Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 289; Snelling, G.C. & Snelling, 2007: 472.
 * Senior synonym of colombi: Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 289; Snelling, G.C. & Snelling, 2007: 472.
 * Senior synonym of enzmanni new synonym (unpublished).
 * [Note: enzmanni is a replacement name for mexicana Enzmann, but proposed subsequent to Snelling, G.C. & Snelling, 2007; hence an automatic junior synonym].
 * Senior synonym of frontalis: Borgmeier, 1953: 12; Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 289; Snelling, G.C. & Snelling, 2007: 472.
 * Senior synonym of gravenhorstii: Borgmeier, 1953: 18; Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 289; Snelling, G.C. & Snelling, 2007: 472.
 * Senior synonym of lemoulti: Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 289; Snelling, G.C. & Snelling, 2007: 472.
 * Senior synonym of mexicana Enzmann: Snelling, G.C. & Snelling, 2007: 472.
 * Distribution: Argentina, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, El Salvador, French Guiana, Guatemala, Guyana, Mexico, Nicaragua, Panama, Paraguay, Peru, Suriname, Trinidad, Venezuela.
 * amplipennis. Labidus amplipennis Smith, F. 1859b: 6, pl. 2, fig. 14 (m.) COLOMBIA.
 * Type-material: holotype male.
 * Type-locality: Colombia: Bogota (no collector’s name).
 * Type-depository: BMNH.
 * Combination in Eciton: Mayr, 1886a: 33;
 * combination in E. (Acamatus): Emery, 1900a: 187;
 * combination in Neivamyrmex: Borgmeier, 1953: 16.
 * Status as species: Roger, 1863b: 42; Mayr, 1863: 424; Dalla Torre, 1893: 1; Forel, 1901h: 48; Emery, 1910b: 25.
 * Junior synonym of halidaii: Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 287; Snelling, G.C. & Snelling, 2007: 472.
 * colombi. Eciton (Acamatus) colombi Santschi, 1921g: 94 (m.) COLOMBIA.
 * Type-material: holotype male.
 * Type-locality: Colombia: Bogota (no collector’s name).
 * Type-depository: MNHN.
 * Combination in Neivamyrmex: Borgmeier, 1953: 13.
 * Junior synonym of halidaii: Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 288; Snelling, G.C. & Snelling, 2007: 472.
 * frontalis. Eciton (Labidus) frontalis Menozzi, 1924a: 30 (m.) BRAZIL (no state data) (attributed to Guérin-Méneville).
 * Type-material: holotype male.
 * Type-locality: Brazil: (no further data).
 * Type-depository: MNHN.
 * Junior synonym of halidaii: Borgmeier, 1953: 12; Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 289; Snelling, G.C. & Snelling, 2007: 472.
 * gravenhorstii. Labidus gravenhorstii Westwood, 1842: 76 (m.) BRAZIL (Goiás).
 * Type-material: holotype male.
 * Type-locality: Brazil: Rio Vendinho, 10.ix.1828 (W. Burchell).
 * Type-depository: OXUM.
 * Combination in Eciton: Dalla Torre, 1893: 3;
 * combination in E. (Acamatus): Emery, 1900a: 187.
 * Status as species: Smith, F. 1859b: 8; Roger, 1863b: 42; Mayr, 1863: 424; Dalla Torre, 1893: 3; Forel, 1895b: 119; Emery, 1900a: 178 (in key); Emery, 1910b: 26; Borgmeier, 1923: 45; Santschi, 1930e: 83.
 * Junior synonym of halidaii: Borgmeier, 1953: 18; Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 289; Snelling, G.C. & Snelling, 2007: 472.
 * lemoulti. Eciton (Acamatus) lemoulti Santschi, 1912e: 524 (m.) FRENCH GUIANA.
 * Type-material: holotype male.
 * Type-locality: French Guiana: La Forestière, St-Laurent du Maroni (Le Moult).
 * Type-depository: NHMB.
 * Combination in Neivamyrmex: Borgmeier, 1953: 14.
 * Status as species: Borgmeier, 1936: 60.
 * Subspecies of halidaii: Borgmeier, 1953: 14.
 * Junior synonym of halidaii: Borgmeier, 1955: 437; Kempf, 1972a: 155; Bolton, 1995b: 289; Snelling, G.C. & Snelling, 2007: 472.
 * mexicana. Woitkowskia mexicana Enzmann, E.V. 1952: 445, figs. 3, 8 (m.) MEXICO (Chiapas).
 * Type-material: holotype male.
 * Type-locality: Mexico: Chiapas, nr Tuxtla, Gutierrez (K. Heffner).
 * Type-depository: unknown.
 * [Note: Enzmann records that the holotype is “in the author’s possession” ; now presumed lost (Snelling, G.C. & Snelling, 2007: 472).]
 * [Junior secondary homonym of Labidus mexicanus Smith, 1859b: 7 (Bolton, 1995b: 290).]
 * Combination in Neivamyrmex: Borgmeier, 1955: 459.
 * Unidentifiable taxon, incertae sedis in Neivamyrmex: Borgmeier, 1955: 459.
 * Status as species: Kempf, 1972a: 157.
 * Junior synonym of halidaii: Snelling, G.C. & Snelling, 2007: 472.
 * Replacement name: Neivamyrmex enzmanni Özdikmen, 2010c: 987.
 * [Note: Özdikmen’s replacement name was proposed subsequent to the Snelling, G.C. & Snelling, 2007: 472 synonymy; hence enzmanni is an automatic junior synonym of halidaii.]

Male
Rufo-testaceus, pubescens: capite (clypeo, mandibulis antennisque exceptis) nigro; stigma alarum brunnea: et abdominis pedunculo transverso-quadrato, supra in medio convexo.

Body reddish testaceous, pubescent, especially about the coxae, beneath the peduncle, and towards the apex of the abdomen. Head black, excepting the clypeus, mandibles and antennre, which are of the same colour, as the body; the latter are inserted nearer the middle of the face than usual, the carinae behind which they are inserted terminating abruptly near the anterior ocellus. The ocelli placed ill a curve upon the vertex, the scape not much more than one-sixth the length of the whole antennae: the mandibles small, leaving but a small aperture between them and the clypeus.

Thorax very gibbous in front, as also at the scutellum; metathorax abruptly perpendicular, slightly produced laterally: superior wings with their stigma brown, marginal cell lanceolate, slightly acuminated from the apex of the second submarginal, and scarcely larger than either of the two first submarginals, which are also nearly equal in size: the first transverso-cubital nervure straight, and the second cubital cell receiving the recurrent nervure at about one half of its length, beyond which the cubital nervure becomes a little thickened: legs short and very slender.

Abdomen very shining: its first segment transverse-quadrate, and a little wider than the second, the posterior angles truncated, and with a small convex elevation in the centre of its superior surface, its ventral portion scarcely produced; the third and fourth segments slightly constricted at their base, and the terminal one acutely vertically compressed, at its apex, where it has a deep fissure; and the sexual organ protruding beneath in the form of a slightly convex plate, deeply emarginate, with the lateral processes very acute.

Type Material
This insect is from St. Paul, on the Brazilian coast. It is the specimen examined by Mr. Haliday, and considered as the Labidus Latreillii in his description of Capt. King's insects; but that it is not this insect, a comparison of its description with the preceding will amply show. I have accordingly dedicated it to Mr. Haliday.

References based on Global Ant Biodiversity Informatics

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