Holotype [♂] [Papua New Guinea: Milne Bay] Goodenough Island, 2500 4000ft, v.1912 «1913» (A.S. Meek) [NHMUK]. The year of capture was incorrectly stated in the original description to be 1912.
Erroneously transferred to Hippotion by Bridges, 1993, Cat. Fam. Gen. Spec. Sphingidae of the World: VIII.10. Returned to Theretra by Moulds, 1996, in Nielsen, Edwards & Rangsi (eds), Monographs on Australian Lepidoptera 4: 270.