Comprehensive DescriptionRead full entry
A ranid with a pointed head and very long hind legs. The SVL of males is 43-50 mm, whereas females measure 51 to 56mm. The tympanum is well defined, reaching 0.8-1.3 of the eye diameter. A clearly visible supratympanal fold is present. Males with paired lateral vocal sacs. Rather flat dorsal ridges are always present, yet often discontinuous. If continuous ridges are present, these form three pairs emerging behind the eyes. The two outer pairs fuse on the last third of the back. The remaining four ridges stretch further to the end of the body. Additional short ridges may appear on the flanks. Small warts occasionally form short ridges. The rest of the skin is usually smooth. The small inner metatarsal tubercle reaches just 0.3-0.4 of the shortest toe length. Thighs reach 0.6 of the SVL; shanks 0.7; the foot, including the longest toe, 0.9 of the SVL. Toe-tips and fingertips are not expanded. Webbing formula: 1 (0), 2 i (0.5) or (1), 3 i (1), 4 i/e (0.5) or (0), 5 (0).
Loveridge (1955a) and Perret (1966) give 43-55 mm (SVL) for males and 53-63 mm for females. Chabanaud (1921) quotes a male measuring 55 mm.
Voucher specimens: The one specimen collected in the Comoé National Park was lost. Additional examined specimens: ZFMK 42263 Azagny National Park, 42162-164 Tai National Park, both Ivory Coast, specimens from Tai National Park without number.
Coloration: Snout and back are bright brown and are scattered with numerous, but inconspicuous, dark spots. A dark brown marking, resembling an hour-glass, extends from the eyes to the vent. However, this marking is not always well-defined. On the flat ridges, some red warts are often discernible. The latter may also appear on the eyelids and shanks. Dark patches occasionally present next to the ridges. The upper border of the iris is silver, the rest is black, similar to the lateral snout and temporal regions. The black band of the snout and temporal region is bordered dorsally by a somewhat brighter line. The black lateral line stretches to the groin, showing a slight incision at the base of the arm. Some dark patches appear on the gray brown extremities. Five distinct black bars are usually present on the thighs and shanks. The venter is white or yellow. The borders of the lower jaw bear some dark patches. The webs are darkly pigmented. Juveniles have a bright yellow venter.
Loveridge (1955a) quotes green vocal sacs, a pale yellow throat and a yellow venter. A similar description was published by Chabanaud (1920), but this author quotes a white venter and a yellow iris. In alcohol, the colors of animals from southern Ivory Coast appeared just a little faded.
Voice: Unknown at Comoé National Park. At Tai National Park, it is similar to that of P. bibroni. The call seems to be somewhat shorter. Schiøtz (1964c) gives a sonagram that shows a sequence of single calls comprising two harmonies from 0.6-3.1 kHz. The call duration is approx. 0.2 sec.
This account was taken from Rödel, M.-O. (2000), Herpetofauna of West Africa vol. I. Amphibians of the West African Savanna, with kind permission from Edition Chimaira publishers, Frankfurt am Main.
For references in the text, see here