A medium-sized, somewhat stunted ranid with long hind legs. Adult males measure 30-39 mm (SVL), females 36-47 mm. Several rows of vaguely defined dorsal ridges, two of which stretch from the eyes to the center of the back where they gradually fade; two further ridges emerge anterior to the center of the back, stretching backward towards the vent, which they hardly ever touch. Besides, two pairs of very short ridges are usually located further outward. The tympanum is clearly visible and reaches 0.5-0.8 (usually 0.7) of the eye diameter. Males have paired lateral vocal sacs, enlarged thenar tubercles and swollen first fingers. Finger-tips and toe-tips not expanded. The inner metatarsal tubercle almost reaches the shortest toe length (0.5-0.8, most often 0.7). The outer metatarsal tubercle is well-defined. The thighs reach 0.5-0.6 of the SVL, the shank length is 0.55-0.69 of the SVL. The feet. incl. longest toe, usually reaches more than 0.75 (0.68-0.85) of the SVL. The webbing formula is 1 (0), 2i (1) or (0.5), 3 i/e (1-0) or (1-0.5), 4 i (1), 5 (0).
Voucher specimens: SMNS 8952 1-7 + tadpoles; SMF 78624.
Coloration: Dorsum almost uniform red brown to red. Very rarely, a vaguely defined dark marking may be present in the center of the back. It appears more distinct on breeding males. The red back is sharply separated from the belly by a dark band. This band sometimes reaches the dimensions of the lateral line in P. longirostris. Several dark patches of different size are often present on the caudad sections of the flanks. The dark bars on the hind legs are often indistinct. Snout and tympanum region are dark to deep black laterally. The temporal triangle stretches to the base of the arm. Some animals have paler upper lips. The upper part of the iris is silver or golden, the rest is dark. The anterior part of the thigh is dark bordered, at least in its proximad section. The posterior part is mottled in yellow and black. On some animals, the yellow patches of the pattern form one or two longitudinal rows. The venter is white to gray. The border of the lower jaw may be black. The anterior parts of the males vocal sacs are black, the rest is pale beige. The webs are pigmented dark. In alcohol the red live coloration either turns even more intense, or the animal appears altogether gray.
Voice: The croaking advertisement call consists of two harmonies reaching from 1.55-2.61 and 3.34-4.9 kHz, respectively. A single note lasts 0.05-0.08 sec, being composed of two to four pulses, each lasting 0.01-0.02 sec, and separated by pauses of the same length. The intervals between the notes last about 0.05-0.11 sec. Similar calls have been published by Schiøtz (1964c, as sp.1) and Amiet (1974b, as P. huguettae). The latter describes the call as a quick "kik kik kik".
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
- RÃ¶del, M. O. (2000). Herpetofauna of West Africa, Vol. I. Amphibians of the West African Savanna. Edition Chimaira, Frankfurt, Germany.