Genus of flowering plants
Ceratopetalum is a genus of nine species of shrub and tree in the family Cunoniaceae. They are found along the eastern coast of Australia and extend north to New Guinea. Two Australian species are among the best known, one being "C. apetalum" or coachwood, renowned as a timber tree, and "C. gummiferum", the New South Wales Christmas bush.
Both New South Wales Christmas bush ("C. gummiferum") and coachwood ("C. apetalum") are widespread from south-east Queensland to the south coast of New South Wales, whereas the other extant Australian species are largely confined to high-altitude montane habitats in north-east Australia. These restricted distributions have been hypothesised to be refugia from cycles of changing climate during the Pleistocene. 
Fossil evidence.
Fossil evidence for "Ceratopetalum" species has been found in Eocene deposits in South Australia. Named fossil species include "Ceratopetalum maslinensis" and "Ceratopetalum westermannii".
References.
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