Type species: desquamata Strand = arizana Wileman, Taiwan.
Inoue (1988) suggested that this genus was appropriate also for hyalinata
Moore (N.E. Himalaya, Burma), indicated by Watson (1968) not to be related
to Hyalospectra, the genus with which it was then combined.
It can be defined on characters of facies and genitalia. The facies is
somewhat similar to that of Hyalostola Hampson (See
Hampson), but with
greater translucence to the paler areas of the wings, and the darker markings
being grey or brown rather than red. These markings consist of an irregular
medial band and a more intense but narrower and more jagged submarginal one on
both wings. The brown colour also extends along the veins through the
transparent areas, thus the submarginal and a fine brown marginal line enclose a
series of pale areas between the veins. These are regular, rather lunulate, on
the hindwing, but separated into apical and dorsal sectors by an extension to
the margin of the postmedial transparent area between M3 and CuA1 on the
forewing. The submarginal brown band has a conspicuous, basally directed tooth
in the space between M1 and M2.
The antennae of both sexes are bipectinate, those of the female more
narrowly so than those of the male. The forewing venation has a large 'areole' that is not quite closed distally, with R2 coverging with R3+4 very
closely for 2- 3mm before diverging subapically. R1, R5 and M1 arise from this 'areole'. The venation of Hyalostola is similar but with M1
The male (hyalinata) eighth sternite has apodemes as in Hyalostola
but is narrower, and the structure of the tegumen is somewhat similar, with
socii associated with the anal tube. The valves are also divided into three
processes. However, the saccus is strong, rather than graded as a plate into the
The female of hyalinata has the ovipositor lobes fused, conical, rugose. The lamella postvaginalis consists of two semicircular, setose lobes,
and the lamella antevaginalis is a broad, deep, somewhat trapezoid plate. The
bursa contains a spinal signum.
Apart from the Himalayan and Taiwanese species
mentioned above, there is an undescribed species from Sri Lanka and the new
species described below.
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