Temnothorax nitens

Modified from Mackay (2000) "This species nests under stones or logs. One nest was found in a termite nest. Nests contain 69-276 workers (Cole. 1958a) and are monogynous. This species occurs in Ponderosa Pine and pinyon-juniper forests. Sexuals have been found in nests from June to August."

Identification
Mackay (2000) - A member of the Temnothorax nitens species complex.

Ward (2005) - characterized by a strongly cuneate (wedge-shaped) petiole, as seen in profile. Body color varies from pale yellow to medium brown. Integument sculpture tends to be light; the head and mesosoma are finely reticulate-foveolate, with extensive shiny areas usually on the front of the head and occasionally on the mesosoma dorsum. The propodeal spines are variable, relatively short but better developed (on average) than in Temnothorax andrei, and usually as prominent as the anteroventral petiolar process, or more so. In the holotype worker of Temnothorax nitens the mesosoma dorsum is smooth and shiny centrally, but as noted by others (Wheeler 1903d; Cole 1958c) the head and mesosomal sculpture is highly variable in this species, and both shiny and more heavily sculptured workers can be found in the same nest. I have also observed this in California populations from the Sierra Nevada. The California workers with a shiny promesonotum tend to have weak longitudinal carinulae encroaching anteriorly and laterally, as in the Temnothorax nitens type.

Distribution
Western US including Washington, Oregon, California, Idaho, Wyoming, Nevada, Utah, Arizona, New Mexico, Texas.

Distribution based on Regional Taxon Lists
Nearctic Region: United States. Neotropical Region: Mexico.

Habitat
Ward 2005 "A diverse array of habitats from sea level to ~2600m"

Abundance
Common.

Nomenclature

 *  nitens. Leptothorax (Leptothorax) nitens Emery, 1895c: 322, pl. 8, fig. 16 (w.) U.S.A. Cole, 1958c: 536 (q.m.); Wheeler, G.C. & Wheeler, J. 1973b: 71 (l.). Combination in L. (Myrafant): Smith, D.R. 1979: 1394; in Temnothorax: Bolton, 2003: 271. Senior synonym of mariposa, melinus: Ward, 2005: 17. See also: Wheeler, W.M. 1903c: 244; Mackay, 2000: 379.
 * mariposa. Leptothorax nitens var. mariposa Wheeler, W.M. 1917a: 507 (w.) U.S.A. Combination in L. (Myrafant): Smith, D.R. 1979: 1393; in Temnothorax: Bolton, 2003: 271. Junior synonym of nitens: Creighton, 1950a: 265. Revived from synonymy and raised to species: Cole, 1958c: 536; as species in Mackay, 2000: 362. Junior synonym of nitens: Ward, 2005: 17.
 * melinus. Leptothorax (Myrafant) melinus Mackay, 2000: 368, figs. 29, 33, 132 (w.) U.S.A. Combination in Temnothorax: Bolton, 2003: 271. Junior synonym of nitens: Ward, 2005: 17.

Worker
Testacea, pedibus dilutioribus, superne nitida, capite nitidissimo, vertice fere impunctato, genis et fronte rugulosis, clypeo antice striatulo, postice laevigato, haud carinato, margine antico subsinuato,mandibulis basi striatis, antennis 12articulatis, flagelli articulo primo sequentibus tribus una longiore, clavae articulis 2 primis subaequalibus; thoracis dorso haud impresso, nitido, parce punctato, lateribus opacis, crebre punctatis, dentibus metanoti brevissimis; pedunculi segmento 1. brevi, nodo alto, cuneiformi, segmento 2. praecedente paulo crassiore; piUs corporis modice copiosis, brevibus, clavatis. Long. 2 1/4 mm.

Queen
(Cole 1958) Head densely punctate and subopaque except for a narrow longitudinal strip, between the median ocellus and the clypeus, which is finely and faintly punctate and rather shining; hairs sparse, slender, pointed, erect and suberect, yellow, of variable length, mostly limited to ocellar area, mandibles, and clypeus. Thorax, except scutum, strongly shining, very faintly punctulate and longitudinally striate; scutum distinctly striato-punctulate and shining to subopaque; epinotal declivity finely and faintly punctate. Mayrian furrows moderately developed. Thoracic dorsum with sparse, slender, pointed, mostly suberect and subappressed, moderately long hairs which are longest on scutellum. Petiolar and postpetiolar nodes with very sparse, suberect hairs. Gaster with sparse, scattered, moderately long, slender, pointed, appressed, subappressed, and suberect hairs. Pubescence absent from entire body.

Male
(Cole 1958) alate - Epinotal spines prominent, rather long, very broad at base, pointed apically, directed posteriorly. Petiole and postpetiole as in worker. Cephalic dorsum with very sparse, rather long, blunt, slender, erect, yellow hairs. Gular area with abundant, short, slender, pointed, suberect hairs. Thoracic dorsum with numerous erect, mostly short (but variable in length), slender, blunt, yellow hairs. Hairs on petiolar and postpetiolar nodes long, slender, pointed, rather numerous. Lateral surfaces of epinotum densely punctate; infraspinal facet transversely striato-punctate. Head and thorax rather uniformly and longitudinally rugulose, faintly and finely punctulate, and shining. Gastric hairs moderately abundant, slender, scattered, of unequal length, erect and sub erect dorsally, sub erect laterally. Pubescence everywhere very dilute. Body color a rather deep tan, gaster strongly infuscated.

Type Material
Mackay (2000) - type locality: USA, San Francisco. Although Creighton (1950) states there are no types in this country, the holotype (consisting of only a mesosoma) is in the (labeled AmFkCan. 23-6 Ut; USNMType # 54075) (seen). A specimen labeled as a type in Emery's collection is incorrectly labeled (seen). The locality is: USA, San Francisco. The specimen is poorly mounted and the head is covered with glue so it is impossible to identify it.

References based on Global Ant Biodiversity Informatics

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