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Platyjionia Hampson
Type
species: sada Swinhoe = mediorufa Hampson.
One
synonym of the type species of this genus has traditionally been associated with
Ugia, but the male antennae are fasciculate, and the forewing marking
consists of a medial band, the postmedial border to which meets the costa well
basal to the apex. The submarginal markings are barely evident, but are
definitely not stepped on the forewing.
The male
abdomen has the eighth segment of the framed, corematous type, but the tergite
is not strongly modified. The genitalia have the uncus relatively long and
slender, and a scaphium is present. The tegumen and vinculum are joined on each
side by a pronounced paratergal sclerite. The valves are narrow, rather
paddle-like distally, and with a dorsally directed thorn-like process arising
from the sacculus centrally and crossing a small lacuna. The valve bases touch,
and are associated with an ovate, rugose structure centrally in the diaphragm; a
similar structure is seen in Leptocola Gen.
n.,
described next. Structures that appear to be similar are illustrated by Owada
(1987) for some herminiines in the related genera Hadennia Moore
and Paracolax
Hübner.
There is a shallow juxta, possibly of the inverted ‘V’ type. The aedeagus is
flanked on each side by two or three robust spines on the anellus. In the
female, the finely scobinate ostium is set within the eighth segment (see also
the Saroba
Walker
group of genera on p. 336), the seventh being only slightly
modified as in Ugia.
It leads into a moderate but narrow, sclerotised ductus. The corpus bursae is
large, distinctly pyriform, with the ductus seminalis arising from a small
appendix in its neck, and with fine, scobinate banding in its distal sphere.
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