This genus has many features in common with Alelimma, as indicated above, but is distinguished by the elongate, forward-directed labial palps (not significantly scaled or tufted) and by the secondary sexual characters of the male: the foretibia, whilst not shortened as much as in most other genera with this feature, has a sheath arising from its distal end that is appressed to the first basal segment (Fig 48); the forewings are deepened and rounded distally, with a massive patch of elongated scales under a semicircular flap extending from the costa across the distal part of R1 to as far as Rs and the discal mark; the Rs veins all are slightly concave to the anterior in this area. There is often coarser scaling in the same position on the underside, and this may also form a zone surrounding the main patch of the forewing. The male hindwings are also enlarged relative to the forewings, with slight extension apically when compared with the females.
The male genitalia have the valves apically acute, sometimes broadly bifurcate, and with more of an angle or process at the margin at the distal end of the sacculus than in Alelimma. The aedeagus is larger, and the vesica only slightly rugose to scobinate.
The female genitalia of the Bornean species have a moderate, narrow, unsclerotised ductus bursae and a large, bean-shaped corpus bursae that is over twice as long. There is a broad band of basally directed spines that forms an incomplete ring subapically. The ductus seminalis arises subbasally and somewhat laterally.
Apart from the Bornean species below, the genus is only known from the Sulawesi group of islands where at least three species occur, all undescribed except the type species. On the main island the three species dissected all have valves that are differently structured at the apex from biangular to bifid, with a shallow concavity in between. All have the aedeagus vesica scobinate, and one (slide 19902) has a narrow, serrate, sclerotised extension from the apex of the aedeagus into the vesica. Another (slide 19903), found mainly at low altitudes, is similar to curiosa in facies and may be conspecific. The third (slide 19901) is montane.
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