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Risoba orientalis Holloway stat. n.
Risoba sticticata orientalis Holloway, 1976: 22.
Risoba viridata Bethune-Baker sensu Martini & Thöny, 1993: 7.


Risoba orientalis

Diagnosis and taxonomic note.
The facies is similar to that of
sticticata Prout from New Guinea but this typically has asymmetric saccular processes on the valve more as in the vialis group and a shorter more angled costal flange. The facies of the green and brown forewings of orientalis is distinctive, particularly the strongly punctate postmedial, which is reflected by a similar row of dots at the distal end of the pale zone of the hindwing. The discal ring of the forewing is prominent. The male genitalia have an elongate, slightly crimped flange as in calainigrata; the aedeagus has a central comb of spines but the vesica contains a row of sharp spines with broad bases (sticticata lacks strong cornuti). Thus, orientalis is unrelated to sticticata and belongs in the jucunda group. R. calainodes Prout (Sumatra) has facies similar to calaina but aedeagus ornamentation more as in orientalis, though the row of spines on the aedeagus is longer, broader, slightly spiralled, the spines finer. R. diehli also has an aedeagus of this type.

Geographical range. Borneo.

Habitat preference. The original male was from 1620m on G. Kinabalu; Martini & Thöny (1993) recorded a further male from 950m on G. Trus Madi, Sabah. Kinabalu.

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