Arthroleptis pygmaeus Ahl, 1925 "1923", Sitzungsber. Ges. Naturforsch. Freunde Berlin, 1923: 105. Holotype: ZMB unnumbered in the original publication; possibly ZMB 28346, according to A.G.C. Grandison in Frost, 1985, Amph. Species World: 449. Type locality: "Buala am Uam, Neu-Kamerun", Central African Republic.
Micrarthroleptis pygmaeus — Deckert, 1938, Sitzungsber. Ges. Naturforsch. Freunde Berlin, 1938: 159.
Phrynobatrachus (Micrarthroleptis) pygmaeus — Laurent, 1941, Rev. Zool. Bot. Afr., 34: 208.
Chad River Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 104).
Known only from the type locality (Buala, Central African Republic).
See Frétey, 2007, Alytes, 25: 83-85, for discussion of the type locality. Frétey, 2008, Alytes, 25: 99-172, summarized the literature. Not addressed by Zimkus, Rödel, and Hillers, 2010, Mol. Phylogenet. Evol., 55: 883-900, so not assigned to species group.
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