Cupaniopsis newmanii, commonly known as long-leaved tuckeroo,[2] is a species of flowering tree in the soapberry family and is endemic to eastern Australia.

It is a rainforest tree with paripinnate leaves with 16 to 24 narrowly egg-shaped to elliptic leaflets, and separate male and female flowers arranged in panicles, the fruit a rust-coloured capsule flushed with pink.

Cupaniopsis newmanii is a shrub or small tree typically growing to a height of up to 6 m (20 ft) with a dbh of 5 cm (2.0 in).

The trunk is crooked, and not buttressed, with dark grey or black bark, marked with vertical lines and cracks.

[2][3][4] Cupaniopsis newmanii was first formally described in 1984 by Sally T. Reynolds in the journal Austrobaileya from specimens collected in the Numinbah Valley in 1978.