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Sypnoides
infernalis Berio
Sypnoides
infernalis Berio in Berio & Fletcher, 1958: 356.
Sypnoides
gluta Swinhoe sensu Kobes, 1976: 31.
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Sypnoides
infernalis  |
Sypnoides
infernalis |
Sypnoides
infernalis |
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Diagnosis. This and the
next species are very similar to each other and to congeners, having a rich,
dark brown ground to the forewing, variably crossed by a straight double
postmedial and an obtusely angled (or curved concavely distad) double
antemedial that together define a narrow medial band. These fasciae are paler
than the ground but may be obscure. Between them is some further pale lineation
and a discal spot. The fasciation tends to be yellowish white in infernalis and bluish white
in the next species. The medial area can also be suffused with the same shade.
Identification can only be made with confidence from the male genitalia. Both
these species have the uncus flanked by spoon-like structures from the tegumen,
as in S. gluta Swinhoe (Sumatra),
but these are larger in the next species and with more spines around the scoop
of the spoon. The tegumen is broader in infernalis. The valves are
more acute and with more intricate ornamentation with flanges.
Taxonomic
note. Berio described two aberrations of the species: ab. macrophthalma Berio, with the
forewing uniform brown; ab. paralba Berio, with the medial area whitened
apart from triangles at the costa and dorsum. No clear examples of the latter
have been located, but a form of the next species probably parallels it. Both
this and the next species are closely allied to S. gluta Swinhoe,
described from Sumatra but noted also from Borneo by Berio & Fletcher
(1958); Bornean material associated with gluta in BMNH is
probably of infernalis and the next species, so this record needs
confirmation. Eleven dissections across the range of variation of both failed
to reveal any gluta, but gluta does occur in Peninsular Malaysia (slide 19106). The record of
females of infernalis from Java by Berio & Fletcher (1958) is not
included in the range below, given the difficulty of identifying males in this
complex, and the relatively greater uniformity of characters in female
genitalia, which were not studied by Berio & Fletcher. However, two males
from Java (slides 19104, 19105) indicate these Javan females may belong to a
further species allied to gluta. The males have a valve apex tending
towards that of gluta, but spatulate rather than acute; the more basal processes of
the valve are more as in infernalis. The tegumen is ventrally narrow as in parva, though the
uncus and processes flanking it are more as in infernalis.
Geographical
range. Borneo.
Habitat
preference. Most material is from lower montane forest from 900m to 1630m,
though two females have been recorded from 300m in the Ulu Temburong of Brunei.
The species is known from G. Kinabalu, G. Marapok, G. Mulu, G. Api and Bukit
Retak.
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