Three species recorded in the past in Singapore are probably extinct.
1. Arctornis perfecta.
Large species with deep & acute FW in the male.
No discal spot; satiny white without corrugation.
https://www.mothsofborneo.com/part-5...thini_1_36.php
P.Malaysia.
https://static.inaturalist.org/photo...7015/large.jpg
2. Arctornis phrika.
FW with a discal spot & a sinuous postmedial fascia.
Frons & palps dull rufous brown & legs patched the same.
https://www.mothsofborneo.com/part-5...thini_1_26.php
Fortunately there is a BOLD image with visible patterns.
http://v3.boldsystems.org/pics/EPNG/...1479336568.JPG
Sabah.
https://inaturalist-open-data.s3.ama...135/large.jpeg
P. Malaysia.
https://inaturalist-open-data.s3.ama...7577/large.jpg
https://inaturalist-open-data.s3.ama...9/original.jpg
https://inaturalist-open-data.s3.ama...5808/large.jpg
There is much confusion with Arctornis poecilonipha in the past.
The general description seem to fit both.
https://www.mothsofborneo.com/part-5...thini_1_21.php
Arctornis poecilonipha.
FW with a rather larger irregular discal spot.
Frons with a dark brown patch & palps much paler; legs marked with dark brown.
FW more densely laid with opalescent scales, postmedial angled at 90% to costa at upper third.
P. Malaysia.
https://inaturalist-open-data.s3.ama...9230/large.jpg
https://inaturalist-open-data.s3.ama...8089/large.jpg
https://static.inaturalist.org/photo...2218/large.jpg
https://inaturalist-open-data.s3.ama...0203/large.jpg
3. Arctornis camurisquama.
A distinctive white arcuate postmedial band that falls short of costa & dorsum. Costa more reflective.
https://www.mothsofborneo.com/part-5...thini_1_50.php
Sabah.
https://inaturalist-open-data.s3.ama...695/large.jpeg