Solenopsis globularia species complex

The following is based on: 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. [[Media:Pacheco, J.A. & Mackay, W.P. 2013. The systematics and biology of the New World thief ants of the genus Solenopsis.pdf|PDF]]

Solenopsis globularia Species Complex


 * Solenopsis bucki
 * Solenopsis desecheoensis
 * Solenopsis globularia
 * Solenopsis lucayensis

This is a group of New World thief ants in the genus Solenopsis.

Diagnosis - The workers of this complex can be distinguished by their greatly dilated, globose postpetiole. Additionally, the clypeal carinae are well developed with five teeth present on the anterior clypeal margin. The extralateral teeth are present as angles, the lateral teeth are well developed and a medial tooth is present as well. Moreover, the workers of this complex have horizontal striae present on the mesopleuron as well as the metapleuron and range in color from pale yellow to dark brown. The eyes are large, with 12-25 ommatidia. Solenopsis globularia is polymorphic, while S. bucki, S. desecheoensis and S. lucayensis are monomorphic, based on examined material.

All members of this species complex are highly variable. The eye can have 12-25 ommatidia, the medial clypeal tooth can be viewed as well developed to nearly absent, striae is present on the mesopleuron and covers the whole propodeum. Because of these variable characters, we propose synonymy of all varieties and subspecies as the polytypic Solenopsis globularia. The only species that does not have striae covering the whole propodeum is S. lucayensis and it is concolorous pale yellow, monomorphic and based upon available all workers appear to have 12-15 ommatidia and we raise it to species status. The variety from Desecheo Island is concolorous dark brown and appears to be monomorphic is given new status, as a valid species. Solenopsis bucki is undeniably a member of this species complex based on the large eye (20 ommatidia), striated mesopleuron and metapleuron and globose postpetiole. The globose postpetiole is the definitive trait of these species, but is also found in a potentially unrelated species (a possible parallelism), S. loretana (placed in the molesta species complex). Solenopsis loretana can be separated based on the much smaller eye that only contains five ommatidia and is only mentioned to reduce confusion in identification.