Fig. 1.

Scanning electron microscope images of (A) the tetrad patterning of the tokay gecko (G. gecko) setal mats and (B) the four setae that are grouped together to form a single tetrad. To represent the tetrad morphology of the toe pad, a patterned surface was used to model the gecko setal mats (C) using dimensions similar to those of the gecko setal mat. Each column, representing one seta, was 60 μm high and 4 μm wide. The separation distance between columns (setae) was 1 μm, and separation between tetrad unit cells was 2 μm. The model unit cell used for calculations is boxed in C. Scale bars are 10 μm.