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 Author Tillack, Frank Museum fuer Naturkunde Berlin, Leibniz-Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, 10115 Berlin, Germany Author Ruiter, Ronald de Nederlands Openluchtmuseum, Hoeferlaan 4, 6816 SG Arnhem, The Netherlands Author Roedel, Mark-Oliver https://orcid.org/0000-0002-1666-195X Museum fuer Naturkunde Berlin, Leibniz-Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, 10115 Berlin, Germany mo.roedel@mfn-berlin.de text Zoosystematics and Evolution 2021 2021-08-10 97 2 407 450 http://dx.doi.org/10.3897/zse.97.68000 journal article http://dx.doi.org/10.3897/zse.97.68000 1860-0743-2-407 DC2EBA6293A141938ADC2A79F7D658B9 9446F0CE40A752B4897F7B7B71BBFD29 Hyperolius friedrichsi Ahl, 1930d: 67. Holotype. ZMB 30637, "Antananarivo, Madagaskar" [Analamanga Region, Madagascar], coll. Karl Friedrichs [sic] aus Rostock. Present name. Heterixalus betsileo (Grandidier, 1872). Remarks. Depicted in Ahl (1931b : 422, fig. 295). From October 1914 until the end of 1915, the German zoologist and colonial officer Prof. Dr. Friederichs, who was a prisoner of war during the First World War, collected in the courtyard of the French Fort Duchesne (on a hill opposite of Antananarivo, ca. 1400 m a.s.l.). Later, he continued collecting until 1916 on Kap Diego [Cap Diego, Antsiranana I District, Diana Region, Diego Suarez Province] in northern Madagascar ( Schulthess 1918 ; Friederichs 1919 ).