Multicoloniality and swarming flights reported from Mainz, Germany (Heller, 1971).
Steiner et al. (2018) - Worker and queen. Colour generally lighter than in Messor muticus and Messor ponticus. Rugosity of cuticular surface more regular than in Messor structor, rugae sometimes parallel. Discrimination from M. structor and M. muticus by short 1st funicular segment and by base of scape without lobe but with a small tooth-like processus. Discrimination from all four species by finely costate base of mesopleuron. Head costate almost throughout unlike in M. ponticus, and costae less regular than in Messor mcarthuri. Setae more abundant on side of head than in M. ponticus, similarly to M. structor, M. muticus, and M. mcarthuri. Petiole not as costulate as in M. mcarthuri. Discrimination from M. ponticus, M. structor, and M. muticus by 1st gastral tergite’s entirely imbricate surface.
Worker. Size similar to M. structor and M. muticus, major workers usually smaller than in M. ponticus and M. mcarthuri. For individuals difficult to discriminate from M. structor using qualitative morphology, linear discriminant function is available.
Queen. Smallest and only species with microreticulate and not shining surface of anepisternum and katepisternum among all five species.
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
mtDNA: Six haplotypes of COI (1375 bp) known; (Gen-Bank).
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- ibericus. Messor structor var. ibericus Santschi, 1931a: 4 (w.m.) SPAIN.
- [First available use of Messor barbarus subsp. structor var. iberica Emery, 1922c: 92 (w.) SPAIN; unavailable (infrasubspecific) name.]
- Santschi, 1931a: 4 (m.).
- As unavailable (infrasubspecific) name: Emery, 1924c: 164.
- Subspecies of structor: Santschi, 1931a: 4; Santschi, 1932c: 69.
- Subspecies of barbarus: Ceballos, 1956: 302.
- Status as species: Collingwood, 1978: 68, 81 (in key); Bolton, 1995b: 254; Borowiec, L. 2014: 107; Steiner, Csösz, et al. 2018: 398 (redescription).
- Senior synonym of novaki: Steiner, Csösz, et al. 2018: supplementary material, 8.
- novaki. Messor structor subsp. novaki Finzi, 1929: 92 (w.) CROATIA.
- Junior synonym of structor: Atanassov & Dlussky, 1992: 114; Bolton, 1995b: 256.
- Junior synonym of ibericus: Steiner, Csösz, et al. 2018: supplementary material, 8.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Steiner et al. (2018) - Worker and queen. Colour: Head and mesosoma light brown to brownish red, gaster brown to dark brown. Major worker mostly dark brown. Queen dark brown. Size: Medium. Queen small, similar in size to major. Head: Entirely sculptured with mostly parallel costae, which usually bifurcate above eye level. Sculpture disappears gradually above eye level, at least on vertex. Postocular region on side of head can lack costae, but microsculpture always present. Erect setae abundant on side of head from occiput to mandibular insertion. Scape: Base without lobe, tooth-like processus directed mostly downward. 1st funicular segment short and flattened, longer than 2nd segment, but shorter than 2nd and 3rd segments together. Clypeus: Median notch well-defined, but shallow in some minor workers. Pronotum: Median costae often arched, middle of pronotum often smooth. Mesonotum: Densely sculptured throughout, costae transverse and mostly parallel. Mesopleuron: Densely sculptured with fine, irregular costulae with dense punctuation among them, even in minor worker. Propodeum: Mostly rounded; rarely angulated in major worker; smoothly rounded in minor worker. Parallel costae on side. Surface of 1st gaster tergite: Entire surface imbricate.
Queen: Metanotum: Densely sculptured throughout, costae transverse and mostly parallel. Anepisternum: Microreticulate. Katepisternum: Middle microreticulate, side additionally with parallel longitudinal costulae.
Steiner et al. (2018) - 1 lectotype worker by present designation, upper individual on pin with two workers labelled “Cataluna Gavá: VII.94. (Nov.) A. Cabrera Aphaenogaster (Messor) barbara r. sordida Forel. A. Cabrera, Cataluna Gavá: VII.94. (Nov.) A. Cabrera Aphaenogaster (Messor) barbara r. sordida Forel. A. Cabrera, SYNTYPUS Messor structor var. ibericus Santschi, 1931, Museo Genova coll. C. Emery (dono 1925)”; 1 paralectotype worker by present designation, lower individual on same pin as lectotype, Museo Civico di Storia Naturale, Genoa.
- Collingwood, C. A. 1978. A provisional list of Iberian Formicidae with a key to the worker caste (Hym. Aculeata). EOS. Rev. Esp. Entomol. 52: 65-95 (page 68, Raised to species)
- Emery, C. 1922d. Messor barbarus (L.). Appunti de sinonimia e di sistematica. Boll. Soc. Entomol. Ital. 54: 92-99 (page 92, First available use of Messor barbarus subsp. structor var. iberica; unavailable name.)
- Heller, G. 1971. Beitrag zur Kenntnis der im Gebirt von Schwabenheim/Selz (Rheinhessen) vorkommenden Ameisenarten. MS Diplomarbeit, Universität Mainz, 45 p.
- Santschi, F. 1931a. Inventa entomologica itineris Hispanici et Maroccani, quod a. 1926 fecerunt Harald et Håkan Lindberg. Fourmis du Bassin Méditerranéen occidental et du Maroc récoltées par MM. Lindberg. Comment. Biol. 3(1 14: 1-13 (page 4, worker, male described)
- Steiner, F.M., Csősz, S., Markó, B., Gamisch, A., Rinnhofer, L., Folterbauer, C., Hammerle, S., Stauffer, C., Arthofer, W. & Schlick-Steiner, B.C. 2018. Turning one into five: Integrative taxonomy uncovers complex evolution of cryptic species in the harvester ant Messor “structor”. Molecular Phylogenetics and Evolution, 127: 387–404 (DOI: 10.1016/j.ympev.2018.04.005).