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The Callidulidae as defined here (Minet 1991, 1999), the sole member of Calliduloidea, comprise three subfamilies which formerly had been divided into two families. Adult callidulids are generally brightly colored, and all three subfamilies contain at least some day-flying species. The family occurs only in the Oriental region and Madagascar, and is sometimes referred to as the Old World Butterfly Moths. The subfamilies are as follows.
Callidulinae include about 50 species in eight genera, restricted to the Oriental region with a few species reaching palearctic Asia. As can be seen in these images from jpmoths.org, the adult moths, which are normally diurnal, fold their wings above the body at rest like butterflies. The antennae are filiform (thread-like), never pectinate(comb-like) like those of nocturnal moths, but differ from those of butterflies in being at most slightly club-like. All the known larvae of callidulines feed on ferns, from shelters created by rolling or tying the foliage. This behavior is nicely pictured in Moths of Borneo.
The Pterothysaninae consist of the genera Helicomitra, a single species restricted to Madagascar and flying at night, and Pterothysanus, about 10 species found in the Oriental region and flying by day or both day and night. The moths are said to be geometrid-like (Scoble 1982). There is an excellent image of a live Pterothysanus adult at Thaibugs. Very little is known about the biology of this subfamily, and the larvae have not been discovered.
The Griveaudiinae consist of a single species endemic to Madagascar. It flies at least sometimes during the day (Minet 1999).