- 10 species in New Guinea, Australia (Queensland) and New Caledonia; formerly placed in the Sphenostemonaceae The evolutionary (phylogenetic) relationship of the family and Paracryphiaceae's three genera is believed to be:
Head entity: Sphenostemonaceae
Tail entity: Paracryphiaceae
Relation (head \u2192 tail): taxon synonym
Inverse relation (tail \u2192 head): taxon synonym of