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Margana tenuilinea Swinhoe comb. n.
Rhesala
tenuilinea Swinhoe, 1905, Ann. Mag. nat. Hist. (7), 16: 623.
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Margana ?tenuilinea
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Diagnosis. See the generic description. The wings
are dull medium brown with fine, irregular, dark fasciae as illustrated. The
medial fascia, though more diffuse, is usually the most conspicuous.
Taxonomic note. The two described species in the
genus have identical facies, but the male genitalia show differences in the
processes of the valves, those of seclusalis being more
obliquely aligned at their distal extremities. The processes of the tegumen are
more strongly developed in seclusalis, the uncus is shorter, and the arms of
the transtilla are longer and narrower. The aedeagus vesica has five clumps of
spines compared with two in tenuilinea. The female of seclusalis is very similar
to that of tenuilinea, though the corpus bursae is
slightly shorter, and there is a more marked constriction at its junction with
the short ductus. Males from Borneo, Peninsular Malaysia and China are
unknown. The Bornean female has genitalia similar to those of tenuilinea except the bursa
is less elongate and less sclerotised, more ovate, and the vestigial apodemes
of the eighth segment are close to the ostium. There is thus probably a
distinct species in Borneo, but material is
too limited to allow confident description of such.
Geographical range. Sumatra, ?Borneo.
Habitat preference. Five specimens were recorded at
170m near the Danum Valley Field Centre in Sabah,
four in primary forest and one in logged forest. Only
one female voucher was available for study.
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