Afrixalus osorioi (Ferreira 1906)

Jongsma, Gregory F. M., Tobi, Elie, Dixon-MacCallum, Graham P., Bamba-Kaya, Abraham, Yoga, Jean-Aimé, Mbega, Jean-Daniel, Beh, Jean-Hervé Mve, Emrich, Andrea M., Blackburn Abstract. - We, David C., This, Gabon. & Park, Batéké Plateau National, 2017, Amphibians of Haut-Ogooué Province, southeastern Gabon, Amphibian & Reptile Conservation (e 144) 11 (1), pp. 1-23 : 10

Afrixalus osorioi (Ferreira 1906)

Material: Twenty one (21) specimens. Doumaye: CAS 258160, 258161, 258262–70; OMNH 44788; GFMJ 1356–58, 1475–78, 1531–32. Fig. 6H , Fig. 7A, B .

Comments: Afrixalus osorioi is similar in appearance and habitat preference to A. dorsalis , but distinguished from that species by its distinct advertisement call. Afrixalus osorioi is known from Angola, Republic of Congo, Democratic Republic of Congo, Kenya, and Uganda. These specimens represent the first country records for Gabon. This species inhabits bushland habitat. It has a unique pattern that helps distinguish it from other Gabonese Afrixalus , typically with a rectangular dark dorsal spot and a narrow light dorsal pattern extends to the anus ( Schiotz 1999). Laurent (1982) mentions that this pattern does not vary within populations; however, we encountered some variation, including individuals that possessed no dark rectangle at all ( Fig. 6 , 7 ). The identification of these specimens was confirmed by comparing DNA sequence data for 16S ribosomal RNA from these specimens to another identified sample (K. Charles and D. Portik, unpubl. data; CAS 256140).

Figures

Fig. 6. Sclerophrys gracilipes CAS 258282 (A), Sclerophrys superciliaris GFMJ 1314 (B, C), Conraua crassipes ORB 97 (D, E), Hoplobatrachus occipitalis CAS 258278 (F), Afrixalus dorsalis ORB 140 (G) A. osorioi GFMJ 1356 (H).

Fig. 7. Afrixalus osorioi CAS 258270, CAS 258161 (A, B), A. quadrivittatus GFMJ 1492 (C), Cryptothylax greshoffi OMNH 44789 (D), Hyperolius adspersus CAS 258168, 2583332, GMFJ 1304 (E–G), H. olivaceus CAS 258159 (H).