Where did the Angiosperms 1st evolve II

Evidence from early basals

Look at the distribution of primitive families at the base of angiosperm hylogen

Amborella

Trichopoda- New Caledonia (Pacific Rim).

Pacific rim = lands around the rim of the Pacific ocean.

Hydatellaceae

Also Pacific rim

Families with predominantly Eastern Pacific Rim distribution (Amborella. Hydatellaceae. Austrobaileya. Trimenia. illicium. Schisandraceae. Hedyosmum. Ascarina.)

Eastern Pacific rim

Maybe these basal angiosperms are found here because the pacific ocean has provided this region with a stable climate for millions of years.

Although it has had a more or less stable climate it has not been geologically stable. Ring of fire- a horseshoe shaped region around the pacific ocean characterized by frequent earthquakes and volcanic activity.

Zealandia

A continent more or less sunken in the pacific that may have played a role in angiosperm evolution. 93% submerged. Submerged for 23 my.

Also Antarctic.