Hyperolius concolor concolor (Hallowell, 1844)

(Fig. 4D)

COLLECTION MATERIAL. — Burkina Faso • 2♂; (SVL 27.2-28.4 mm); Houet province, Sokourani (near Hippopotamus pond); 11.51183°N, – 4.11611°W; 320 m a.s.l.; 8.XI.1970; M. Lamotte leg.; MNHNRA-1999.7211, 1999.7212 .

FIELD MATERIAL. — Burkina Faso • 2♂ (SVL 27.8-29.5 mm); Comoé-Léraba Forest, Sirigoué swampy valley; 9.88809°N, – 4.61954°W; 230 m a.s.l.; 2.VIII.2018; H. J. Ayoro & A. Ohler leg.; on flooded grasses; hand capture • 5 ♂ (SVL 30.3-31.7 mm); Comoé-Léraba Forest, Baboro swampy valley; 9.92522°N, – 4.57575°W; 240 m a.s.l.; 4.VIII.2018; same collectors as for preceding; on high, flooded grasses; hand capture • 1♂ (SVL 29.7 mm); Kou Forest, near the Guinguette water source; 11.18720°N, – 4.44185°W; 340 m a.s.l.; 7.VIII.2018; same collectors as for preceding; on leaves of palm trees; hand capture.

DESCRIPTION. — 10 specimens examined. Only males collected, with SVL 27.8-31.5 mm. Life colouration yellowish to greenish (Fig. 4D). Usually during the day, males more brownish to yellow, often with some dark dorsal pattern, whereas females showing a green colouration. At night individuals of both sexes with a yellow colour (Rödel 2000). In alcohol, specimens whitish with small black spots, visible only with a dissecting microscope.

HABITAT. — Hyperolius concolor concolor was found on flooded grasses in Comoé-Léraba Forest and on palm leaves at the source of the Guinguette River in Kou Forest. Specimens were usually sitting comparatively higher than H. nitidulus, but see Rödel et al. (2006) for calling site position in various West African hyperoliids. The species is known to occur in areas of degraded forests and humid savannah; it extends into drier savannah zones along gallery forests (SchiØtz 1999; Rödel 2000). It is distributed in West Africa from Sierra Leone to northern Benin (SchiØtz 1999; Rödel 2000; Nago et al. 2006).