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Pseudocassyma
Gen. n.
Type species: sundagraphoides sp. n.
The genus contains two Bornean species with facies similar to that of Sundagrapha
species. It is also known from Sumatra (Heterocera Sumatrana collections)
and Peninsular Malaysia (FRIM collection). Elements of the male genitalia
suggest a broader relationship with the Cassymini, but the male third sternite
lacks a setal comb, and the ornamentation of the bursa copulatrix is very
unusual for ennomines, let alone the Cassymini.
The forewing radial veins are reduced to four as in the Cassymini, with R1 arising independently from Rs. The male antennae are fasciculate (bipectinate
in Sundagrapha).
The ground colour of the wings is salmon pink, speckled with red on the
hindwing upperside, but not on the underside. Both wings are broadly and
completely bordered with dark grey on the underside, the discal dots are
enclosed in narrow bands of the same colour, and it also lines the forewing
costa. The medial bands are lacking on the upperside, and the borders are
reduced, that on the hindwing to an apical patch only, and that on the forewing
being interrupted over the marginal half by two patches of ground colour,
centrally and subapically.
The male genitalia have the uncus rather weak. The valve has a slender,
curved arm arising from the base of the valve costa as in the cassymines. The
lamina of the valve is much reduced, just lining the tegumen, membranous,
sparsely scattered with setal bases, and thickened just submarginally by a
narrow band arising from the base of the costal arm. The saccular margin is
strongly sclerotised, produced into a long spine apically, with a secondary,
much smaller spine adjacent to it. The base of the valve supports coremata; the
vinculum is slender, somewhat looped on each side. The juxta is ovate. There is
a small, teat- like saccus. The aedeagus is relatively large, the vesica with a
cluster of large but slender cornuti.
The female genitalia have the ostium flanked by a pair of membranous
pockets. The bursa copulatrix is sclerotised over the basal half, with several
irregularly placed rows of variably sized spines arising from it. A single large
spine represents the signum in the distal half of the bursa.
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