Hyperolius oeseri Ahl, 1931a: 51.

Tillack, Frank, Ruiter, Ronald de & Roedel, Mark-Oliver, 2021, A type catalogue of the reed frogs (Amphibia, Anura, Hyperoliidae) in the collection of the Museum fuer Naturkunde Berlin (ZMB) with comments on historical collectors and expeditions, Zoosystematics and Evolution 97 (2), pp. 407-450 : 407

Hyperolius oeseri Ahl, 1931a: 51.

Holotype.

ZMB 31867, "Grand Bassa, Liberia" [Grand Bass County, Liberia], coll. Richard Oeser.

Present name.

Hyperolius fusciventris Peters, 1876.

Remarks.

The German physician Dr. Oeser undertook various journeys, e.g. to East Asia and Indonesia (1923 as a ship’s doctor), to the USA (1925), to Central America and northern South America (1931-32) as well as to Cameroon (1936). In spring 1928 he undertook a journey along the West African coast, collecting in Benin, Nigeria, Fernando Pó, Sao Tomé and Principe, Angola, Namibia and Liberia. He collected the type material of H. oeseri and Hyperolius trifasciatus Ahl (see below). A large part of his collection was sold through the zoological wholesaler "Scholze & Peotzschke" in Berlin ( Mertens 1975).