A family of about 26 genera and about 100 species, pantropic but extending into high latitudes in the northern hemisphere; three genera occur naturally in Australia.

Neostrearia - A monotypic genus endemic to Australia. Hewson (1989); Smith (1958).

Noahdendron - A monotypic genus endemic to Australia. Endress et al. (1985); Hewson (1989).

Ostrearia - A monotypic genus endemic to Australia. Hewson (1989); Smith (1958).

Endress, P.K. (1989). Phylogenetic relationships in the Hamamelidioideae. In 'Evolution, Systematics and Fossil History of the Hamamelidae. Vol. 1, Introduction and 'Lower' Hamamelidae.' Crane, P.R. & Blackmore, S. (Eds) Systematics Association. The Systematics Association Special Volume No. 40A, (Clarendon Press: Oxford.), pp. 227-248.

Endress, P.K., Hyland, B.P.M. & Tracey, J.G. (1985). Noahdendron, a new Australian genus of the Hamamelidaceae. Botanische Jahrbucher fur Systematik 107:369-378.

Hewson, H.J. (1989). Hamamelidaceae. In 'Flora of Australia.' Vol. 3, (Australian Government Publishing Service: Canberra.), pp. 1-4.

Smith, L.S. (1958). New species of and notes on Queensland plants - III. Proceedings of the Royal Society of Queensland 69:43-51.