Hyperolius cinnamomeoventris Bocage, 1866
H. cinnamomeoventris is quite similar in appearance to the sympatric H. kivuensis, and some specimens may be virtually impossible to discriminate by visual means. H. cinnamomeoventris is typically smaller, with a more abbreviated snout, smaller gular flap and more distinct light dorso-lateral stripe for the male. In the case of H. kivuensis, both sexes have the same pattern, while in H. cinnamomeoventris, the female is green in colour. H. cinnamomeoventris is also very similar to some populations of H. lateralis. The best diagnostic characteristic betwixt these two taxa is the totally different call. Finally, it resembles the poorly understood H. schoutedeni. The males may be inseparable, but the female of H. schoutedeni has the same colour-pattern as the male (Schiøtz et al. 2004).
H. cinnamomeoventris exhibits a pronounced sexual dichromism with the male typically brownish to green, usually with a white dorso-lateral line and somewhat diminutive gular flap. The female manifests a uniform green dorsum delimited from the white ventrum by an irregular black lateral line. Pupils in both sexes are horizontal (Schiøtz 1999).
H. cinnamomeoventris is considered a small to medium-sized member of its genus, with a snout to vent length for males of 19 to 28 millimetres, and for females 19 to 27 mm. (Schiøtz 1999).
Hyperolius cinnamomeoventris occurs from central and southern Cameroon, southward to Angola and the northwestern part of Zambia, and eastward to Uganda and westernmost Kenya. There are no records from the Central African Republic, but Schiøtz et al. (2004) believes that this anuran is likely to be found in Central African Republic, and potentially in Tanzania and Rwanda, as well (Schiøtz et al. 2004).