Figure 1. Scanning electron photomicrographs show the microstructure of scales in P. persicus (A–D). Head scales (A, ~1000X and B, ~5000X), midboby dorsal scales (C, 5000X), and dorsal caudal scales (D, 5000X).
The polygonal lattice-like structure is also seen in P. fieldi , but in comparison to P. persicus , the lattices are irregular and each polygon is finer and deeper. In P. fieldi the spongy-like structure is not seen (Figure 2).