Nothing is known about the biology of Solenopsis leptanilloides.
Pacheco and Mackay (2013) – Worker This is a very small concolorous pale yellow species. The head is elongate with coarse punctures. The lateral clypeal teeth are angular and the extralateral teeth are absent. The clypeal carinae are nearly absent in this species. The notopropodeal suture is weakly depressed. The postpetiole is oval-shaped when viewed dorsally. Solenopsis leptanilloides could be confused with Solenopsis pygmaea (North America) but can be distinguished by its more elongate head. Additionally S. pygmaea has more developed, sharp lateral clypeal teeth that extend past the anterior clypeal margin, which is easily distinguished from the short, angular clypeal teeth with S. leptanilloides.
Solenopsis leptanilloides may be confused with Solenopsis westwoodi (southern South America), but can be distinguished as it is pale yellow, not medium dark brown as S. westwoodi. Moreover, although S. westwoodi has coarse cephalic punctures, they are scattered and smooth and shiny between, compared to the numerous punctures present in S. leptanilloides. Solenopsis leptanilloides is also similar to Solenopsis dysderces as both species have noticeably elongate heads. Close comparison reveals that S. dysderces has a larger head, in length, width and when measured from the dorsal to ventral surface. Additionally, S. leptanilloides has a noticeably slender body compared to the more robust S. dysderces. Solenopsis dysderces is only known from the mountains of Chile, while S. leptanilloides is found in northeastern Argentina.
Keys including this Species
Santa Fe, Rosario, Argentina.
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Known only from the worker caste.
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- leptanilloides. Solenopsis (Diplorhoptrum) leptanilloides Santschi, 1925e: 159, fig. 4 (w.) ARGENTINA. See also: Pall & Quirán, 2009: 381.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Pacheco and Mackay (2013) - Measurements (n=6). TL 0.960-l.20 (l.06); HL 0.312-0.360 (0.335); HW 0.240; EL 0.012; ED 0.012; SL 0.180-0.198 (0.183); FSL 0.060-0.066 (0.061); CI 66.7-76.9 (71.9); SI 50.0-60.0 (54.8); PL 0.060-0.084 (0.070); PW 0.072-0.084 (0.077); PI 83.3-100.0 (90.7); PPL 0.066-0.078 (0.072); PPW 0.072-0.102 (0.085); PPI 76.5-92.3 (85.3); WL 0.210-0.240 (0.224); PSL 0.018; PSW 0.018.
Small, concolorous pale yellow; head much longer than wide, with coarse cephalic punctures; lateral clypeal teeth angular, extralateral teeth absent; clypeal carinae nearly absent; scape short, reaches about ¾ length of head; minor funicular segments 3-8 short; mesopleuron smooth and shiny; notopropodeal suture weakly depressed, mesonotum and propodeum on straight line at dorsal mesosomal margin; propodeal spiracle small; posterior propodeal margin rounded; petiole slightly wider than postpetiole viewed laterally, postpetiole oval viewed dorsally.
Not very pilose; head with short (0.006-0.010 mm) erect and suberect hairs; scape pilose with suberect hairs; most suberect hairs on mesosoma, petiole and postpetiole curve posteriorly.
Argentina, Santa Fe, Rosario (Hubrich), Sammlung, Dr. F. Santschi, Kairouan (lectotype worker and 5 paralectotype workers [here designated] Naturhistorisches Museum, Basel). M.C.Z. Cotype 1-2 21914, Wm. M. Wheeler (2 cotype workers [seen] Museum of Comparative Zoology). Rosario, Argentina, Hubrich (1 cotype worker [seen] Los Angeles County Museum of Natural History).
- Pacheco, J.A. & Mackay, W.P. 2013. The systematics and biology of the New World thief ants of the genus Solenopsis (Hymenoptera: Formicidae). Edwin Mellen Press, Lewiston, New York. 501 pp.
- Santschi, F. 1925h. Formicidae. Mission Rohan-Chabot 4(3 3: 159-168 (page 159, fig. 4 worker described)