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Throanagonia corona sp. n.

Throanagonia corona
Figure 477
Figure 479

10mm and 13mm, putative 13mm. This is a larger, more robust species than albiocellata but has very similar facies, and is best distinguished on internal features. The male genitalia have bilateral symmetry whereas those of albiocellata do not. One valve process has an external, subapical spine that renders the apex triangular, and another process, the longest, is flexed inwards and bears long setae on the exterior curvature. The aedeagus has an apical spine with subspines that is not seen in albiocellata. The female genitalia have a more elongate ductus (with a reinforced lateral lobe subbasally) and corpus bursae than in albiocellata, and the posteriorly directed, crown-like structure is narrow, with six strong terminal spines (these are more numerous, smaller and more irregular in the type species).

Holotype . SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.), Site 14, February, Camp 2.5, Mulu, 1000m. 413461, lower montane forest, BM noctuid slide 19984.

Paratype . MALAYSIA: Sabah, Danum Valley, 170m, 4°58' N 117°48' E (S.J. Willott) 1° understorey, P1 (=1U), Obs. Tower, DVFC, 18.iv.94, BM noctuid slide 20150.

Putative (head missing). SUMATRA: Dempo, 4-5000ft., 4.viii.1923 (C.J. Brooks), BM noctuid slide 19947.

Taxonomic note. The associated male matches the holotype closely in size and facies, except the underside of the latter is a darker, more uniform grey, only slightly paler on the hindwing where the male has a distinctly paler fawn area. Nevertheless, it appears to be a closer match to corona females than to the next species where males are also unknown. The lateral lobe to the ductus bursae may be to receive the process of the male aedeagus apex.

Geographical range. Borneo, Sumatra.

Habitat preference. Bornean material is from lowland and lower montane forest. The Sumatran male is from a montane locality. The paratype is a voucher for a series of five taken in similar habitat (S.J. Willott, unpublished data).

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