Fig. 6
Contact angle and droplet shape on distal tarsus of Rhagovelia distincta and Gerris latiabdominis. Top panels are example images of water droplets on different leg surfaces. Middle panels contain corresponding SEM images showing dorsal hair layers (A, D), ventral hair layers (B, E), and the surface of R. distincta`s claw (C). Bottom panels are time-course changes (relative to droplet disappearance, set as 100%) in droplet shape index (height/width, yellow squares) and contact angle (degrees) measured on the proximal (orange diamonds) and distal (purple circles) sides of the droplet. (A) Contact angle on R. distincta`s dorsal midleg tarsus (tarsomere 3). (B) Contact angle on R. distincta`s ventral midleg tarsus (tarsomere 3). (C) Contact angle on R. distincta`s claw. (D) Contact angle on G. latiabdominis`s dorsal midleg tarsus (tarsomere 2). (E) Contact angle on G. latiabdominis`s ventral midleg tarsus (tarsomere). For additional details, see Figure S24 and commentary in SI Part 4, and Video S4.
