Solenopsis oculata

Nothing is known about the biology of .

Identification
A New World thief ant that is a member of the nigella species complex.

Pacheco and Mackay (2013) – Worker - This is a small, dark brown species with a head that is longer than wide with very fine punctures. The eyes are large, with approximately 30-35 ommatidia. Antennal segment 10 is relatively long at 0.240 mm in length. Both the anterior and posterior faces of the petiole are nearly vertical and converge to form a rounded, although somewhat triangular node. Unlike other species of this complex, this species lacks a tooth at the subpeduncular process. The postpetiole has a rounded node and is wider than the postpetiole when viewed from above.

This species could be confused with other members of the nigella species subgroup, but may be distinguished by the lack of a tooth on the subpeduncular process, which is well defined in all other members of the nigella subgroup.


 * Key to New World Solenopsis Species Complexes

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina.

Castes
Known only from the worker caste.

Nomenclature

 * . Solenopsis (Diplorhoptrum) angulata st. oculatus Santschi, 1925e: 161 (w.) ARGENTINA (Catamarca).
 * Type-material: lectotype worker (by designation of Pacheco & Mackay, 2013: 245), 4 paralectotype workers.
 * Type-locality: lectotype Argentina: Catamarca, Cerro Colorado (Weiser); paralectotypes with same data.
 * Type-depository: NHMB.
 * Combination in S. (Euophthalma): Creighton, 1930b: 133.
 * Status as species: Creighton, 1930b: 133 (redescription); Ettershank, 1966: 142; Kempf, 1972a: 238; Bolton, 1995b: 389; Pacheco & Mackay, 2013: 244 (redescription).
 * Distribution: Argentina.

Worker
Pacheco and Mackay (2013) - Measurements (n=5). TL 1.80-2.04 (1.88); HL 0.520-0.552 (0.534); HW 0.432-0.456 (0.444); EL 0.108-0.120 (0.118); ED 0.078-0.084 (0.079); SL 0.390-0.438 (0.413); FSL 0.192-0.198 (0.194); CI 81.8-86.5 (83.2); SI 73.9-80.8 (77.4); PL 0.102; PW 0.120; PI 85.0; PPL 0.126-0.132 (0.127); PPW 0.162-0.174 (0.169); PPI 72.4-77.8 (75.2); WL 0.390-0.420 (0.409); PSL 0.024-0.030 (0.029); PSW 0.024-0.030 (0.029).

Small, concolorous dark brown; head quadrate, longer than wide, with fine cephalic punctures; eyes large with approximately 30-35 ommatidia; clypeal carinae well developed, extend into well-developed lateral teeth, extralateral teeth rounded; scapes long but do not reach posterior lateral corner of head; notopropodeal suture well depressed, groove breaks sculpture of mesosoma; horizontal striae present on mesopleuron as well as metapleuron; propodeal margin angled, propodeal spiracle small; petiole barely wider than postpetiole in profile, anterior and posterior faces of petiole subvertical, converge to form rounded triangular node, peduncle lacking tooth; postpetiole rounded node, wider than postpetiole when viewed dorsally.

Little pilosity present; sparse sub erect hairs present throughout body surfaces.

Type Material
Pacheco and Mackay (2013) - 5-46, Sammlung, Dr. F. Santschi, Kairouan Argentina, Catamarca, Cerro Colorado (Weiser) (lectotype worker and 4 paralectotype workers [here designated] ).

References based on Global Ant Biodiversity Informatics

 * Creighton W. S. 1930. The New World species of the genus Solenopsis (Hymenop. Formicidae). Proceedings of the American Academy of Arts and Sciences 66: 39-151.
 * Cuezzo, F. 1998. Formicidae. Chapter 42 in Morrone J.J., and S. Coscaron (dirs) Biodiversidad de artropodos argentinos: una perspectiva biotaxonomica Ediciones Sur, La Plata. Pages 452-462.
 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * Kusnezov N. 1978. Hormigas argentinas: clave para su identificación. Miscelánea. Instituto Miguel Lillo 61:1-147 + 28 pl.
 * Pacheco J. A., and W. P. Mackay. 2013. The systematics and biology of the New World thief ants of the genus Solenopsis (Hymenoptera: Formicidae). Lewiston, New York: Edwin Mellen Press, 501 pp.
 * Salinas P. J. 2010. Catalogue of the ants of the Táchira State, Venezuela, with notes on their biodiversity, biogeography and ecology (Hymenoptera: Formicidae: Amblyioponinae, Ponerinae, Proceratiinae, Myrmicinae, Ecitoninae, Formicinae, Pseudomyrmecinae, Dolichoderinae). Boletín de la SEA 47: 315-328.