Dorsal stripe coloration types in P. robertsi (A–C) and proportion of colors per site, ranging from red to orange (A, B) and from brown to black (C), different dorsal patterns found: 1) well-defined, brick red dorsal stripe; 2) dense dorsal mottling; 3) dorsal red line only present on the tail; 4) semi well-defined, yellow dorsal stripe; 5) dorsal yellow line only present on the tail; 6) few scattered spots in the dorsal line and in the tail; 7) all black without spots or dorsal line; D) color patterns of the dorsal stripe in the different sampling sites.