species: quadrisignata Walker, [India].
(type species achaeoides Walker, Sulawesi).
wing margins are more dentate than in the preceding genera,
particularly that of the hindwing where there may be a longer process on
M3, especially in D. brevicauda Wileman & South, though this is not
as conspicuous as in the next genus. The forewing pattern often involves a
transverse component through or adjacent to the reniform that can separate a
darker basal area from a paler one distally, though this may be obscure in some
forms of the more variable species. The underside has prominent but narrow dark
fasciae that show similarity in the splayed disposition of those of the
forewing to those in the next genus (as does the lobe to the hindwing dorsum of
quadrisignata Walker). However,
though the male antennae are fasciculate or bipectinate, those of the females
male abdomen, the eighth tergite is shortened to a narrow transverse strip
apart from narrow, semi-detached lateral processes that flank the sternite. The
latter is massively enlarged, square, with a
crescent-shaped, framed lacuna anteriorly that bears hair-setae. This does not
appear to be homologous with the typical framed corematous condition. The edges
of both sternite and tergite are invested with fringes of hairs. The genitalia
are characterised by long, narrow valves that become slightly but sharply
upturned at their central point; there is a central, tongue-like flap subbasally.
female genitalia are typical of the Sypna group (see p.
genus is exclusively Indo-Australian, extending from the Indian Subregion to New Guinea.
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