File:Perissomyrmex Figure 2.jpg

Summary
Figure 2. Size frequency distribution of a field sample of Perissomyrmex snyderi. The dots are the observed head width values plotted against the expected values of a standard normal variable. Two line segments of differing slope are evidence of bimodality. Queen head width falls within the range of values for major workers.

[[Media:Longino Hartley 1995.pdf|Longino, J. T.; Hartley, D. A. 1995 [1994]. Perissomyrmex snyderi (Hymenoptera: Formicidae) is native to Central America and exhibits worker polymorphism. Psyche. 101:195-202.]]