Key to adult Central African Petropedetes species

1 toes fully webbed .......................................................................................................................................................... 2

1’ toes half-webbed or rudimentary-webbed .................................................................................................................... 3

2 tympanum distinct; in males ¾ of eye diameter or larger, males with tympanic papillae (Fig. 8 a) and carpal spike in breeding season, tympanum in females up to ¾ of eye diameter; femoral glands large (larger in males) ...... P. perreti

2’ tympanum indistinct in both sexes (Fig. 8 d), small; males without tympanic papillae, but with carpal spike in breeding season; femoral glands large to very large (larger in males) ................................................................ P. palmipes

3 toes half-webbed ...........................................................................................................................................................4

3’ toes rudimentary-webbed.............................................................................................................................................. 5

4 tympanum distinct; males with tympanic papillae (Fig. 8 c) and carpal spike in breeding season; femoral gland line shaped in both sexes (Fig. 9 c) .............................................................................................. P. juliawurstnerae sp. nov.

4’ tympanum indistinct; males without tympanic papillae or carpal spike (Fig. 8 b); femoral gland ovoid (Fig. 9 b), larger in males ....................................................................................................................................... P. cameronensis

5 tympanum small but distinct, in males smaller or equal to eye diameter, in females tympanum less than half eye diameter (Fig. 1 a); males with tympanic papillae and carpal spike in breeding season; femoral gland large................ ..................................................................................................................................................................... P. johnstoni

5’ tympanum of moderate size or large and distinct, in males usually bigger than the eye, in females half the eye diameter or larger; males with tympanic papillae and carpal spike in breeding season; femoral gland very small to moderate .................................................................................................................................................................................. 6

6 femoral gland of moderate size; tympanum in males usually oval shaped or flattened, males with tympanic papillae closer to the centre than upper border, carpal spike present in breeding season; females larger than males; species of moderate size (males: <43 mm; females: <47 mm)........................................................................ P. vulpiae sp. nov.

6’ femoral gland small or very small, shifted to the posterior side of the leg; tympanum in males rounded or flattened; males with tympanic papillae closer to upper border than to centre, carpal spike present in breeding season; large species (males:> 60 mm; females:> 50 mm) .............................................................................................................. 7

7 femoral gland small but distinct (Fig. 2 c), in males about 22% of femur length; tympanum in males ¾ of eye diameter or larger than eye, occurs in lower altitudes of south-western Cameroon and eastern Nigeria (Fig. 4) .... P. parkeri

7’ femoral gland very small (smallest in genus Fig. 2 d), in males only about 16% of femur length; tympanum in males as large as eye diameter, occurs in higher altitudes at Mt. Kupe and Mt. Nlonako (Fig. 4) ....... P. euskircheni sp. nov.