Trisyngyne stylosa (Steenis) Heenan & Smissen (2013) Nothofagus stylosa is a species of plant in the family Nothofagaceae.

It is a Critically Endangered species threatened by habitat loss.

[1] Nothofagus stylosa is known from a single population on the northern slope of the Central Range of Western New Guinea at approximately 1,200 meters elevation.

[1] Nothofagus forests in the area are exploited for timber, and the species is threatened by logging, fire, and conversion of forest to agriculture and other uses.

[3] It was proposed to be renamed Trisyngyne stylosa in 2013.