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 pygmaeus Ahl, 1931a: 22. Holotype. ZMB 36102, "Tanga" [Tanga Region, Tanzania], coll. Georg Martienssen. Present name. Afrixalus stuhlmanni (Pfeffer, 1893). Remarks. Drawing in Ahl (1931b : 273, fig. 143). Hyperolius pygmaeus Ahl, 1931a, is a junior homonym of Hyperolius pygmaeus Meyer, 1875 (= Litoria pygmaea ). Between December 1896 and June 1899, the German planter Martienssen sent amphibians and reptiles from the German colony in East Africa to ZMB. The locality "Tanga" as given by Ahl (1931a) most likely refers to today's Tanga region. It is clear from Martienssen's correspondence with ZMB that the amphibians he sent to Berlin were collected, with few exceptions (e.g. Ukami), exclusively in "Magrotto" [plantation in southern part of Mlinga Mountains, East Usambara, Tanga Region] and "Plantation Schoeller" [Bondei County near Ngomeni, east of the Mlinga Mountains, ca. 25 km SW of Tanga town] (see Gvozdik et al. 2014 ). Martienssen also supported the African expedition to Kilimanjaro undertaken by Yngve Sjoestedt from 1905-1906 by providing porters ( Sjoestedt 1910 : 3). The correspondence between Martienssen and the ZMB curators (especially Gustav Tornier), kept in the archives of the Historical Department at ZMB, reveals that "Laubfroesche" [Tree frogs, Hyperolius spp. (s. l.)] sent by Martienssen to ZMB were all collected on the "Magrotto" plantation between 17 April and 18 May 1897.