Fig. 2
From: Comparative and functional analysis of the digital mucus glands and secretions of tree frogs
Spatial distribution of the digital mucus gland pores in Hyla cinerea. a 3D view of the dorsal (crosses; only the left half of the dorsal mucus pores is shown) and ventral (circles) pores on the digital pad cutis. b Spatial variation of the dorsal and c ventral mucus pore density, approximated by the nearest-neighbour-distance NND [colour-coded in µm], across the pad surface in dorsal view