Gymnopholus mammifer Gressitt, 1966 of Western Highlands / Papua New Guinea – around 2500m ASL.

Gymnopholus mammifer is a flightless true weevil described by J. L. Gressitt in 1966 and reliably recorded from Mount Shungol near Lae, Papua New Guinea, at elevations of approximately 2,000–2,700 metres. The black adult has reddish-orange scale patches and prominent nipple-like tubercles on the pronotum and elytra. The name mammifer combines Latin mamma, meaning “breast” or “teat,” with -fer, meaning “bearing,” evidently referring to these tubercles. Gymnopholus adults are generally sedentary leaf-feeders of montane trees and vines, often resting beneath leaves and becoming more active during foggy conditions.