File:Myrmica crassirugis 2.jpg

Figures 25-27. Myrmica crassirugis. Frontal view of head. 25. Worker. 26. Queen. 27. Male.

Francoeur, A. 2007. The Myrmica punctiventris and M. crassirugis species groups in the Nearctic region. Pages 153-186 in R. R. Snelling, B. L. Fisher, and P. S. Ward, editors. Advances in ant systematics (Hymenoptera: Formicidae): homage to E. O. Wilson - 50 years of contributions. Memoirs of the American Entomological Institute, vol. 80, Gainesville, FL, 690 p.