The moth in your photograph matches a published figure of Chlanidophora patagiata Berg, described by him in 1877 in the Bulletin de la Société Impériale des Naturalistes de Moscou, volume 52, page 9.

It was described from a male specimen from Carmen de Patagones ands the holotype specimen is supposed to be in the Museum in Buenos Aires.

I’ve not been able to find out much more about it but there is a note about its biology (Bourquin, F. 1949. Notes sobre la metamorfosis de Eugliphys bridarolliana Kohler 1949 Lep. Fam. Lasiocampidae – de Chlanidophora patagiata Berg 1877 Lep. Fam. Arctiadae – de Heliconius phyilis F. 1775 Lep. Fam. Heliconiidae – de Cucullia heinrichi Kohler. Acta zool. lilloana, Tucuman 7: 385-391).

As Julian has mentioned, its taxonomic position is not fully resolved so there is scope for further reaearch on this, and related, species. It may be related to some species of noctuid currently placed in the subfamily Glottulinae.

I hope that this helps.

Best wishes

Martin (Lepidoptera Curator, NHM London)