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Calyptronotum Roepke
Calyptronotum
singapura Gaede
Pseudofentonia singapura Gaede,
1930: 624.
Calyptronotum confusum Roepke,
1944, Natuurh. Maandbl. Maastricht. 33: 5, syn. n.
Calyptonotum confusum Roepke;
Kiriakoff, 1968: 167.
Calyptronotum singapura Gaede;
Kiriakoff, 1968: 167.
Diagnosis. This species may be distinguished by its silvery grey
forewings and dark brown-grey hindwings, the former with a biarcuate postmedial,
concavities distad; the submarginal is more or less a straight, thin, black line
over the anterior half of the wing but is stepped over the posterior half.
Taxonomic notes. The male genitalia of Bornean specimens resemble those illustrated for confusum
by Kiriakoff (1968), and the facies of the holotype female of singapura and
the allotype female of confusum are within the range of variation
observed for Bornean females. Therefore the two names are brought into synonymy.
C. gualberta Schaus (which may be a junior synonym of Stauropus
ocularis Semper) is very similar externally but the male genitalia have the
major process of the valve more finely tapered, the more distal, minor one is
larger, the uncus has two small ventral processes and the gnathus has a deeper
angular cleft apically. C. gualberta flies in the Philippines.
The Javan Pseudofentonia walshiae Roepke is somewhat similar in
appearance but is probably closely related to the Burmese Mesophalera
lundbladi Kiriakoff and perhaps the Sumatran M. obliterata Kiriakoff.
Geographical range. Sundaland.
Habitat preference. The species is infrequent in a wide range of lowland
forest types in Sarawak and Brunei but was taken most frequently in lower
montane forest on both G. Mulu and G. Api during the Mulu survey. It has also
been recorded at just over 1600 m on both Bukit Retak and Bukit Pagon in Brunei.
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