| size and shape variability in the skull of myotis nigricans (schinz, 1821) (chiroptera: vespertilionidae) from two geographic areas in brazil. | we present a quantitative analysis of sexual dimorphism and geographic variation in the skull of myotis nigricans (schinz, 1821) assessed by geometric morphometrics. differences in size and shape of skulls were investigated using 30 landmarks plotted on two-dimensional images of lateral and ventral views. results of geometric morphometrics revealed sexual dimorphism in the centroid size of the skull in both views. females were larger than males. nevertheless, there was no sexual dimorphism in sk ... | 2008 | 18833485 |