The silk fibers also showed tremendous variabilities, even between fibers of the same species, in shape and size of their cross-section. A. mimosae and E. bauhiniae fibers had mostly flattened, elongated and rectangular shapes ( Fig. 7e and h), while fibers of G. postica had globular and triangular cross-sections. The silk filaments spun by A. panda had crescent-shaped, triangular or round cross-sections. The fibers also showed great variability in the shape, size and number of voids present. Even though the study failed to quantify the number and size of the voids, the SEM micrographs showed that B. mori silk fibers had few and small voids compared to the wild silk fibers (data not presented).