View Image Gallery of Tribe Eupitheciini

Tripteridia Warren Gen. rev.

Type species: novella Warren, New Guinea.

Synonym: Prosthetopteryx Warren (type species caesiata Warren, New Guinea).

This genus is brought out of 'synonymy' with Micromia Warren (type species fulvipuncta Warren, New Guinea) as it is both the older name (despite being used at subgeneric level within Micromia by Prout (1932c) and morphologically distinct. The species of the whole complex have forewing facies much as in Pasiphila species, but the males have secondary sexual features of the hindwing, particularly a strong subdorsal cleft or fold with enlarged or dense scaling associated with it. Micromia lacks such a feature, as does another subordinated genus-group name, Otucha Warren (type species adminiculata Warren, New Guinea) Gen. rev.

Further definitive features occur in the male and female genitalia. These also exclude Dissolophodes Warren (type species curvimacula Warren, New Guinea) Gen. rev., despite it having a modified male hindwing. Stenista Warren (type species commixtilinea Warren, New Guinea) has not been dissected but may prove to be a further synonym of Tripteridia.

The male abdomen has characteristic octavals joined basally by a strong transverse bar, and with subapical interior spurs distally that anchor the octaval to the lamina. The valves have massive coremata suspended from their exterior surfaces basally, the scales differentially developed, modified and fused. The sacculus is not modified to support them. The uncus is lost (present in Micromia).

The female (those of the two generic type species are unknown) have the bursa with a distinct neck distal to the colliculum of the ductus, and this sometimes bears a basal digitate appendix and contains a variety of spining distal to it. The main bulb of the bursa is spherical, extensively spined. The female of Micromia lacks a neck to the bursa, the bulb of which is similarly spined, a round tubular appendix, leading to the ductus seminalis, arising basally to it.

The genus is very diverse in New Guinea (it should contain most species currently in Micromia) but has some extension eastwards. The four montane species in Borneo are the only Sundanian representatives so far discovered. No information on the biology has been located.

<<Back >>Forward <<Return to Contents page

Copyright © Southdene Sdn. Bhd. All rights reserved.