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Takanea
Nagano
Type
species: miyakei Wileman.
This genus has a general appearance suggesting relationship with Arguda
and lacks humeral veins of the type seen in Fig. 3, thus resembling Arguda and
Radhica and differing from Syrastrena. The humeral zone is strongly
expanded at the base but then narrows rapidly again to converge with vein
Sc.
The wing margins are slightly scalloped, the hindwing more strongly
excavate in the spaces between Sc, Rs and M1. The forewing patterning
consists of post- and antemedial fasciae flanking a discal spot, and an
irregular submarginal fascia. There is a pale medial band at the hindwing
costa in all species, but in diehli it extends right across the wing.
The male antennae are broadly bipectinate over the whole length, those of
the female much more narrowly so.
The male genitalia have the valve divided, the cubile triangular, the apex
of the triangle produced, and a double process at the aedeagus apex.
The genus consists of two northern Oriental species: the type from Japan
and China; excisa Wileman from Taiwan. The single Sundanian species is
thus well separated from the rest of the generic range.
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