Pseudomyrmex tenuis

Identification
Ward (1989) - The lectotype worker of P. tenuis is concolorous testaceous brown, with a densely punctate, opaque head; large elongate eyes; inflected, tectiform median clypeal lobe; sharply margined pronotum; tall, thin, anterodorsally angulate (pointed) petiole; and no erect pilosity on the mesosoma dorsum. This agrees with the concept of P. tenuis which has been prevalent in the literature.

Distribution based on Regional Taxon Lists
Neotropical Region: Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guyana, Peru, Suriname.

Nomenclature

 *  tenuis. Formica tenuis Fabricius, 1804: 405 (w.) BRAZIL. Kempf, 1960a: 28 (q.). Combination in Pseudomyrma: Roger, 1862c: 289; in P. (Ornatinoda): Enzmann, 1944: 61; in Pseudomyrmex: Kempf, 1960a: 7. Senior synonym of ligniseca: Roger, 1862c: 289; of andina, paraensis, pittieri, rufa: Kempf, 1960a: 26. See also: Perrault, 1988a: 384.
 * ligniseca. Pseudomyrma ligniseca Smith, F. 1858b: 158 (q.) BRAZIL. Junior synonym of tenuis: Roger, 1862c: 289.
 * rufa. Pseudomyrma rufa Smith, F. 1877b: 64 (w.) BRAZIL. Mann, 1916: 425 (q.). Junior synonym of tenuis: Kempf, 1960a: 26.
 * pittieri. Pseudomyrma tenuis var. pittieri Forel, 1906d: 230 (w.) COSTA RICA. Junior synonym of tenuis: Kempf, 1960a: 26.
 * paraensis. Pseudomyrma tenuis var. paraensis Forel, 1912g: 19 (w.) BRAZIL. Junior synonym of tenuis: Kempf, 1960a: 26.
 * andina. Pseudomyrma tenuis var. andina Enzmann, E.V. 1944: 92 (w.) PERU. Junior synonym of tenuis: Kempf, 1960a: 26.

Type Material
Syntype worker, Essequibo, Guyana (Smidt) [Examined]; here designated LECTOTYPE.