Comprehensive DescriptionRead full entry
Rather large (males 22-26 mm, females 23-26 mm). Hand without webbing; foot webbing 1(1), 2i(1.5), 2e(1-1.5), 3i(2), 3e(1-1.5), 4i/e(2-2.5), 5(0.25-1); webbing sum is 10.5-13. Vomerine teeth clearly present. Lateral metatarsalia not connected. Dorsal skin smooth. Colouration variable.
Similar species: B. blommersae is very similar. B. grandisonae differs slightly by general appearance, and in many populations by colouration. B. domerguei and B. kely differ by colouration. Confusion is also possible with Mantidactylus argenteus,
Likely to be a species complex (IUCN 2008).