The Throana group of genera
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Microselene Hampson

Type species: mesostipa Hampson, see below.

The genus has facies features that distinguish it from Margana as discussed under mopsa Swinhoe below: narrower forewing with a lunulate pale orbicular on the upperside and a darker crescent on the underside at the anterior concavity of the distal margin; a straight postmedial to the hindwing. In common with the previous genus and the next, the second tergite of the abdomen lacks phragma lobes.

The male abdomen varies considerably between the type species and mopsa, the eighth sternite being deeply cleft distally in the former, the tergite narrow, rather ovate, with strong, unsplayed apodemes; in the latter the segment is virtually unmodified. In the genitalia, the uncus, tegumen and valves are extremely long and narrow in mesostipa but with more normal proportions and relatively simple in mopsa. The aedeagus is small in both species, with one cluster of small spines in the vesica.

The female genitalia of the two species are more similar, with only slight pulling forward of the ostium in the eighth segment, though it is still cleft posteriorly. There is a pair of small triangular processes flanking the cleft. The seventh sternite is only moderately reduced rather than vestigial or absent. The ductus is a short sclerotised tube. The corpus bursae is spherical with an irregularly transverse band of scobination at one third.

The genus contains only the two species discussed here.

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