|Based on Ward et al. (2014) and Blaimer et al. (2018).|
This small genus of 3 species is poorly known. Only Stereomyrmex anderseni, from Australia, has specimen data that provides any clues in regard to their biology. The holotype was collected in a pitfall trap in sclerophyll woodland on brown sand.
Taylor (1991) for the synonymized Willowsiella - Stereomyrmex and Romblonella share several features considered to indicate relationship between them. These include the general configuration of the mesosoma and nodes (despite the differences in the latter), and the fundamentally similar dental, fronto-clypeal, palpal and sting structures (the latter at least as visible without dissection). The two genera may be readily distinguished as follows:
Stereomyrmex - Antennae 11-jointed. Fronto-clypeal area strongly inflated. Antennal scrobes lacking. Petiole massively inflated (in S. dispar ), or somewhat scale-like and transverse (in S. anderseni). Postpetiole relatively small compared to petiole, transverse, and somewhat scale-like. Gaster emarginate at base, following the posterior outline of the postpetiole when viewed from above.
Romblonella - Antennae 12-jointed. Fronto-clypeal area unexceptionally inflated. Antenna scrobes strongly developed. Petiole somewhat globular but not unexceptionally inflated or transverse. Postpetiole of more normal proportions, subspherical, more-or-less as long as wide in dorsal view, at most only slightly smaller than petiole; usually larger. Gaster not basally emarginate.
Keys including this Genus
Distribution and Richness based on AntMaps
• Antennal segment count 11 • Antennal club 3 • Palp formula 5,3 • Total dental count 4-5 • Spur formula 0, 0 • Sting present
• Antennal segment count 11 • Antennal club 4-5
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- STEREOMYRMEX [Myrmicinae: Formicoxenini]
- Stereomyrmex Emery, 1901f: 115. Type-species: Stereomyrmex horni, by monotypy.
- Stereomyrmex senior synonym of Willowsiella: Bolton, 2003: 252, 273.
- WILLOWSIELLA [junior synonym of Stereomyrmex]
- Willowsiella Wheeler, W.M. 1934a: 174. Type-species: Willowsiella dispar, by original designation.
- Willowsiella junior synonym of Stereomyrmex: Bolton, 2003: 252, 273.
- Ashmead, W. H. 1905c. A skeleton of a new arrangement of the families, subfamilies, tribes and genera of the ants, or the superfamily Formicoidea. Can. Entomol. 37: 381-384 (page 383, Stereomyrmex in Myrmicinae, Stenammini)
- Bolton, B. 1994. Identification guide to the ant genera of the world. Cambridge, Mass.: Harvard University Press, 222 pp. (page 105, Stereomyrmex in Myrmicinae, Formicoxenini)
- Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 252, 273, Stereomyrmex in Myrmicinae, Formicoxenini; Stereomyrmex senior synonym of Willowsiella)
- Emery, C. 1901h. Ameisen gesammelt in Ceylon von Dr. W. Horn 1899. Dtsch. Entomol. Z. 1901: 113-122 (page 115, Stereomyrmex as genus)
- Emery, C. 1914e. Intorno alla classificazione dei Myrmicinae. Rend. Sess. R. Accad. Sci. Ist. Bologna Cl. Sci. Fis. (n.s.) 18: 29-42 (page 40, Stereomyrmex in Myrmicinae, Stereomyrmecini)
- Emery, C. 1922c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174B: 95-206 (page 119, Stereomyrmex in Myrmicinae, Stereomyrmecini)
- Forel, A. 1917. Cadre synoptique actuel de la faune universelle des fourmis. Bull. Soc. Vaudoise Sci. Nat. 51: 229-253 (page 242, Stereomyrmex in Myrmicinae, Stereomyrmecini)
- Taylor, R.W. 1991. Notes on the ant genera Romblonella and Willowsiella, with comments on their affinities, and the first description of Australian species. Psyche. 97:281-296. PDF
- Wheeler, W. M. 1910b. Ants: their structure, development and behavior. New York: Columbia University Press, xxv + 663 pp. (page 139, Stereomyrmex in Myrmicinae, Myrmicini)
- Wheeler, W. M. 1922i. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VII. Keys to the genera and subgenera of ants. Bull. Am. Mus. Nat. Hist. 45: 631-710 (page 661, Stereomyrmex in Myrmicinae, Stereomyrmecini)