Table 1. Taxonomic summary of families and genera identified in this study and their present distribution (Family distributions from Watson and Dallwitz, 1992 onwards, genera from the Global Biodiversity Information Facility).
 
 
Family
Genus and current distribution
Argophyllaceae
Argophyllum. Australia, New Caledonia.
Atherospermataceae
South America to Australasia. Restricted to northern parts of New Zealand.
Casuarinaceae
Gymnostoma. Througout Malesia, New Guinea, New Caledonia and highly restricted in Australia to northeast Queensland, absent in New Zealand.
Cunoniaceae-Elaeocarpaceae
Widespread in New Zealand and from Southeast Asia, to Australia, Central and South America and (Cunoniaceae) South Africa.
Ericaceae
Cosmopolitan
Gnetaceae
Closest to extant Gnetum although the fossil is regarded as an extinct genus. Gnetum occurs from Amazonia, tropical west Africa, and tropical Asia from Bombay to Fiji (absent in New Caledonia and New Zealand).
Grisseliniaceae
Grisellinia. South America and widespread in New Zealand.
Meliaceae
Pantropical to subtropical and warm. To latitude 41° 30' S in New Zealand.
Menispermaceae
Pantropical and warm. The family is absent from New Zealand today although it does occur in Australia to about 37 °S. The fossil localities are further south than any living occurrence today.
Monimiaceae
Hedycarya. Australia, New Guinea, New Caledonia, widespread in New Zealand.
Myrsinaceae
Comparable with Ardisia although other genera are not yet ruled out. Ardisia is pantropical to subtropical, but is absent from New Zealand.
Proteaceae
Incl. Lomatia and Placospermum The family is present in the northern half of New Zealand. Placospermum is an Australian endemic, Lomatia is found in Australia and South America.
Santalaceae
Notothixos. Ceylon, Myanmar, Philippines, Malesia, Australia.
Sapindaceae
Temperate to tropical. Not extending to the far south of New Zealand.
Strasburgeriaceae
Strasburgeria. New Caledonian endemic.
Winteraceae
Distinct from extant New Zealand Pseudowintera. Malaysia, Pacific, Australia, New Zealand, Central and South America. Pseudowintera is widespread in New Zealand.