Hyperolius ocellatus (Günther, 1858) Photo figures 16A–E

TYPE LOCALITY.— “Fernando Po”, Bioko, Equatorial Guinea and “ Angola ”. Perret (1975) restricted the type locality to “Fernando Po” by lectotype designation .

DISTRIBUTION.— This species ranges over a vast area, from south-eastern Nigeria to Democratic Republic of Congo and southwards to Gabon and Republic of Congo. In Equatorial Guinea, it has been recorded both in Río Muni (De la Riva 1994; Bell et al. 2017) and Bioko (Boulenger 1900, 1906a; Mertens 1941, 1965; Hydeman et al. 2017; Bell et al. 2017) (Map 17A).

COMMENTS.— Hyperolius ocellatus sensu lato shows a complex phylogeographic structure formed by several lineages (Bell et al. 2017), which need taxonomic revision. Currently, there is one mitochondrial lineage on Bioko, whereas Río Muni could lie in a contact zone between two mainland mitochondrial lineages (Bell et al. 2017). Descriptions of the advertisement calls from Monte Alén were provided by Bosch et al. (2000).

SPECIMENS EXAMINED.— Twenty-nine specimens. Bioko Sur (Luba), Moka, (3º19´N, 8º40´E), 25 July 1984 (14 specimens with the voucher number EBD 18606) ; Ayamiken ( San Joaquín de Ndyiacom) (4 specimens without individual voucher number, EBD 31516) , 1990; Caldera de Luba, Campamento Ureca, 11 March 2007 (MNCN 46720) ; Río San Antonio, Caldera de Luba, 13 March 2007 (MNCN 46725) ; northeast of Caldera de Luba, 12 March 2007 (MNCN 46726) ; BBPP camp, Caldera de Luba, Bioko, 03°20ʹ47.32ʺN, 08°29ʹ48.44ʺE, 28 November 2003 (MNCN 48945– 48946) ; Río Iladyi, Bioko, 03°19ʹ46.04ʺN, 08°40ʹ26.13ʺE, 13 November 2003 (MNCN 48939– 48944) .