Megalixalus immaculatus Boulenger, 1903, Mem. R. Soc. Esp. Hist. Nat., 1: 63. Syntypes: BMNH (2 specimens), by original designation. Type locality: "Escalera au Cap Saint-Jean", Equatorial Guinea.
Megalixalus immaculatus — Noble, 1924, Bull. Am. Mus. Nat. Hist., 49: 270.
"Heterixalus" immaculatus — Perret, 1960, Rev. Zool. Bot. Afr., 61: 372.
"Megalixalus" immaculatus — Schiøtz, 1963, Vidensk. Medd. Dansk Naturhist. Foren., 125: 61.
Opisthothylax immaculatus — Perret, 1966, Zool. Jahrb., Jena, Abt. Syst., 93: 445.
Gray-eyed Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 69).
Southeastern Nigeria through southern Cameroon and Equatorial Guinea to Gabon, western Rep. Congo, and southwestern Dem. Rep. Congo; possibly in to southwestern Central African Republic.
See account for Cameroon by Amiet, 2012, Rainettes Cameroun: 413-422.
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