Hyperolius albofrenatus Ahl, 1931a: 53.

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 albofrenatus Ahl, 1931a: 53.

Holotype.

ZMB 86012, "Deutsch-Ost-Afrika (genauerer Fundort unbekannt [without precise locality])" [probably Tanzania], coll. Ule, 22.XI.1912.

Present name.

Hyperolius albofrenatus Ahl, 1931a.

Remarks.

Drawing in Ahl (1931b: 315, fig. 189). There remains confusion about the collector and, related to this, the likely place of collection. A man by the name of Ernst Heinrich Georg Ule collected in Brazil and donated two frogs to the herpetological collection, one with the accession catalogue number C-581 (from November/December 1912) without further data, and a second one (C-145) on 21 May 1904, collected on the Upper Amazon. The frog thus might actually be a South American tree frog and not a hyperoliid. However, another person named Dr. Ferdinand Uhl was a member of the "Deutsche Schutztruppe" in East Africa who collected the holotype of Hyperolius guttolineatus Ahl, 1931 (see below, unlocated type specimens). Lastly, a person with the surname Uhle collected in Sumatra, Bolivia and Argentina. Thus, neither the identity of the frog, nor its geographic origin and collector can be determined with certainty.