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Bertula sphaerula Swinhoe
     Asthala sphaerula Swinhoe, 1902, Ann. Mag. nat. Hist. (7), 10: 502.

Bertula sphaerula
Figure 84

This darkish, dull brown species has irregular, obscure, fine pale fasciation, but the lunulate white discal spot of the forewing has a more rufous patch between it and the postmedial. It is somewhat similar (see above) to inconspicua, but the white discal spot in inconspicua is not lunulate, but more a collapsed ring, and the forewing submarginal is castellate in sphaerula, more punctate in inconspicua.

Taxonomic note. This species was combined with Bocana by Poole (1989) but has been curated under Bleptina Guenée in BMNH. The male and female genitalia are consistent with placement in Bertula, the former having apically bifid valves and an aedeagus vesica with a broad distal lobe that is scobinate and bears a large triangular cornutus.

Geographical range. Borneo.

Habitat preference. The species was described from Pulo Laut, a low island at the south of Borneo, and there is material without precise data from G. Kinabalu. No records have been made in recent surveys.

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