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Goniophila Hampson
Type
species: excavata Swinhoe, Borneo.
The
genus is probably monobasic; the four additional species listed by Poole (1989)
are probably misplaced, and two are discussed further below (see also p. 338 for
G. lichenea Holland);
however, a new Bornean species is tentatively associated here. The diagnosis
following is therefore based on the type species only.
The
forewings are bifalcate, and the hindwings are obtusely angled at CuA2, the
margin being straight for some distance on each side of the angle. The ground
colour of the wings is medium to pale grey, though extensively irrorated with
red over the distal half, within which a zig-zag grey and black postmedial is
evident. The forewing reniform is narrow, somewhat lunulate, black-edged with a
grey centre. The pattern of the hindwing is restricted to the dorsal half. On
the underside of the forewing the male has a semicircular flap extending
posteriorly from the basal third of the costa that covers a large brush of
straw-coloured hairs that arises near its base from the surface of the wing. The
male antennae are densely fasciculate over the basal half. The labial palps are
typically catocaline.
In the
male abdomen, the eighth sternite contains a single corema within a semicircular
frame at the anterior margin and more extensive sclerotisation posteriorly. The
tergite has slight apodemes and a central constriction to the sclerotisation. In
the genitalia, the uncus has two slight domes dorsally with a long concave
section between them; there is a scaphium. The valve is narrow, somewhat
paddle-shaped, and the sacculus is distally bidentate. The juxta is only weakly
sclerotised, but has elements of the inverted ‘V’ type. The aedeagus vesica
is convolute, scobinate, but without cornuti.
The
female genitalia have the ostium between the seventh and eighth segments. The
ductus is long, slightly sclerotised, but constricted and membranous at the
point where it joins the corpus bursae. This is spherical, with a small subbasal
lobe that gives rise to the ductus seminalis. This lobe is slightly scobinate,
and there is a small zone of denser scobination at the very base of the bursa.
Centrally there is a long, transverse to oblique, and very narrow band of
scobination.
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