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Acraea (genus)
: ''As invalidly established by Hübner in 1819, ''Acraea'' refers to butterflies currently placed in ''Actinote.
''Acraea'' is a genus of brush-footed butterflies (family Nymphalidae) of the subfamily Heliconiinae. It seems to be highly paraphyletic and has long been used as a "wastebin taxon" to unite about 220 species of anatomically conservative Acraeini. Some phylogenetic studies show that the genus ''Acraea'' is monophyletic if ''Bematistes'' and neotropical ''Actinote'' are included (see Pierre & Bernaud, 2009). Most species assembled here are restricted to the Afrotropic ecozone, but some are found in India, Southeast Asia, and Australia.〔Silva-Brandão et al. (2008)〕
== Biology ==
The eggs are laid in masses; the larvae are rather short, of almost equal thickness throughout, and possessing branched spines on each segment, young larvae group together on a protecting mass of silk; the pupa is slender, with a long abdomen, rather wide and angulated about the insertion of the wings, and suspended by the tail only. ''Acraea horta'', ''Acraea cabira'', and ''Acraea terpsicore'' illustrate typical life histories.
The foodplants of ''Acraea'' caterpillars are usually Urticaceae or, like in most Heliconiinae, Passifloraceae. Some feed on other plants, such as Fabaceae, "Flacourtiaceae", or Violaceae. Their preferred species contain cyanogenic glycosides, which make the larvae and adults poisonous to predators. The aposematic coloration of the adults announces this, and some species are mimicked by less noxious butterflies. At least some ''"Acraea"'' are able to produce the toxins themselves.〔 Their flight is slow and flapping.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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