Collonette in 1932 wrote onthe Arctornis in Malaya (including Singapore).
The white species recorded in Singapore includes A. nivosa, singaporensis, phrika, riguata, perfecta, camirusquama & marginalis.



A 2019 survey of the Bukit Timah Forest include a new record, A. ungula.
A. ungula is described as " frons with three black spots & two lower ones. legs spotted.
https://www.mothsofborneo.com/part-5...thini_1_40.php
Probable A. ungula.
Sabah.
https://inaturalist-open-data.s3.ama...491/large.jpeg
P. Malaysia.
https://inaturalist-open-data.s3.ama...0195/large.jpg