Archaic Sun Moths (Lepidoptera: Acanthopteroctetidae)
Archaic sun moths, family Acanthopteroctetidae, are very similar to Eriocraniidae, and include only four species, all North American except for one in the Palearctic (originally described in a separate family Catapterigidae). The family, plus the related Eriocraniiidae, are the only members of the superfamily Eriocranioidea, which form the infraorder Dacnonypha of the suborder Glossata. There are two subfamilies: Acanthopteroctetinae and Catapteriginae. Adults small (11–16 mm wingspan, with roughened head scaling and only short 2-segmented labial palpi; maxillary palpi are 5-segmented and folded; haustellum is reduced and vestigial mandibles are present. Maculation is more somber than in Eriocraniidae and adults are thought to all be diurnal. Larvae are blotch leafminers on Ceanothus (Rhamnaceae) in the single known biology.
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