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Undatavitta
shayleenae sp. n.
 20mm-21mm. The forewing patterning is typical of the genus, with
three clear subbasal to antemedial fasciae, then a broader band of ground colour,
a relatively broad medial fascia; the reniform follows on a transverse dash,
with three postmedial fasciae just outside it, the most distal with brown
grading away towards a more punctate submarginal. This facies is very similar to
that of aroa; U. insignans Hampson comb.
n. (N.E.
Himalaya) has the fasciation more oblique, particularly postmedially, where the
fasciae curve round strongly basad as they approach the costa. The male
genitalia also indicate a closer relationship to aroa, with both species having an
extremely long cornutus-bearing diverticulum to the aedeagus vesica, and a
rod-like (rather than curved, tapering) juxta process. The genitalia of the two
species differs in the shape of the uncus, where aroa
has
a high crest consisting of a pair of coarsely spined, almost circular lobes,
rather than an elongate densely hairy one as in shayleenae.
There is also a prominent pair of processes associated with the dorsal part of
the tegumen in aroa, lacking in shayleenae.
The aedeagus is flexed subbasally in shayleenae rather than straight.
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Undatavitta
shayleenae
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Holotype . BRUNEI: 30-60m, Labi, lowland forest and secondary veg.,
11.9.79 (Lt. Col. M.G. Allen),
BM noctuid slide 18279 [head missing].
Paratypes:
1
BRUNEI:
1670m, Bukit Pagon, montane forest, Feb 1982 (Allen & Harman Harman Harman Harman);
1
SARAWAK,
Borneo.
Geographical
range. Borneo, Sumatra.
Habitat
preference. The two specimens taken in recent surveys are from lowland and
upper montane forests.
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