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“Hyposemansis”
volvapex Kobes
Hyposemansis
volvapex Kobes, 1994, Heterocera Sumatrana 7:
267.
Diagnosis.
This is a small, ochreous fawn species with the forewing slightly mottled with
darker brown and with a scattering of transverse striae of the same colour. On
the underside, the hindwings have more striae than the relatively uniform
forewings. The dark brown labial palps are strongly upcurved, laterally
flattened.
Taxonomic
note. The facies and wing shape are completely different from those
of singha.
Kobes, in his original description, related the species to Hyposemansis through
features of the head, thorax and abdomen, none of which is exclusive to the
genus. The resting posture with wings held erect like a butterfly is shared, but
the apex of the forewing is uniquely folded over in volvapex (illustrated
by Kobes). The lower clypeofrons is unscaled. The male abdomen has the eighth
segment of the framed corematous type. The tergite is relatively broad, the
sternite twice as broad with a reduced anterior lacuna and a strongly bilobed
posterior margin. The genitalia have an aedeagus similar to that of singha,
but the vinculum is broader, without a saccus. The valves are more membranous,
flimsy, enclosing a mass of scales in a fold along their length and having a
hair pencil basally; they lack the setae of singha.
Geographical
range. Sumatra, Borneo, Bali, N.E. Himalaya (Khasia Hills).
Habitat
preference. Only four specimens have been collected in Borneo, all from
lowland dipterocarp forest: from 30-60m at Labi and Ulu Belait and from 300m at
Ulu Temburong in Brunei; from 500m on G. Mulu.
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