Tephrina decursaria Walker,
1862, List Specimens lepid. Insects Colln Br. Mus., 26: 1659.
Diplurodes decursaria Walker;
Holloway, 1976: 80.
Diagnosis. This species generally resembles the first few species discussed, but
the forewing postmedial has a more even, if irregular curvature, the discal spot
is weak, the basal part of the wing is more or less concolorous with the medial
area, and the marginal zone is pale, divided into three by extension of the
submarginal grey broadly over M2 and in the space between the CuA veins. An
oblique black streak occurs at the position of M2 in the hindwing marginal zone.
Taxonomic notes. This species lacks most
of the generic features except the characteristic gnathus, and weak coremata in
the generic configuration. The valve is cleft apically,
separating the apex of the costa from the
rest, and the sacculus is broadly sclerotised but without basal spines. The
aedeagus has a saw-like row of spines at the apex.
Geographical range. Borneo, Peninsular Malaysia, Sumatra.
Habitat preference. During the Mulu survey this species was common in the
lower montane forest zones of both the limestone G. Api (900m) and the
sandstone/shale G. Mulu (1000m). Several specimens were taken at 150m in wet
kerangas on river terraces west of the Melinau Gorge. A few were taken at higher
and lower elevations on G. Api and one at 1200m on G. Kinabalu.
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