Trioceros oweni (Gray, 1831)

Chamaeleo oweni Gray, 1831: 7 . Type locality: Fernando Po (=Bioko).

Chamaeleo tricornis Duméril & Bibron, 1836: 227 . Type locality: Fernando Po (=Bioko).

Chamaeleo bibroni Martin, 1838: 65 . Type locality: Fernando Po (=Bioko).

Chamaeleo grayii Swainsson, 1839: 369 (nomen substitutum pro Chamaeleo oweni).

Chamaeleo unicornis Mocquard, 1906: 464 . Type locality: Ngomo, dans le bas Ogoue, Gabon.

Chamaeleo oweni cristata Sternfeld, 1912: 259 (non Chamaeleo cristatus Stutchbury, 1837).

Type locality: “Landana in Loango, nördlich der Kongomündung”, Democratic Republic of the Congo .

Chamaeleo michelli Müller, 1913: 230 . Type locality: “ Station Go am Rulei, unterer Uelle District ”, Democratic Republic of the Congo.

Trioceros oweni (Gray, 1831): Tilbury & Tolley 2009: 66.

Distribution. It ranges across central Africa, from Cameroon to the East of the Democratic Republic of the Congo, southward to Cabinda (Angola). In Equatorial Guinea it has been recorded in Bioko (Gray 1831; Martínez y Sáez 1886; Boulenger 1887) at Bissé (Bocage 1895 a, 1903), Natividad (Hacienda Natividad) (Bocage 1895 a, 1903), San Carlos (Mertens 1941, 1964), Riaba (=Concepción) (Mertens 1964a; Pérez del Val 2001) and Sampaka, Malabo (Pérez del Val 2001), and in Río Muni at Monte Alén National Park (Lasso et al. 2002) (Map 5C).

Comments. Rarely found in Monte Alén National Park (Lasso et al. 2002).

Specimens examined. Nineteen specimens. Equatorial Guinea, without specific locality (MNCN 5099–5100, 5866; EBD, labels with the numbers 3313 and 3325). Río Muni: Bome, Bata, 25 May 1987 (EBD 24994) ; Bata, 19 October 1984 (EBD 18372); Aconibe, 7 July 1987 (EBD 27488); Río Muni, 1963 (EBD 2730); Etom, a 13 km de Aconibe, 22 April 1987 (EBD 24972–24973); Noayong, Km 23, road from Evinayong to Aconibe, 13 September 1987 (EBD 24995) . Bioko: Malabo, 13 October 1984 (EBD 18393); seminario de Banapá, Malabo, Bioko (EBD 22093–22094); Finca Sampaka, Malabo, 1941 (MNCN 5101); Bioko, without specific locality (MNCN 5113); Bioko, without specific locality, 24 April 1886 (MNCN 5115); Riaba (= Concepción), August 1959 (MNCN 18458) .