Late Permian

Illwarra Coal Measures

Mudgee, New South Wales, Australia

18mm fruit on 65mm slab with second 13mm fruit on back.

Fructification.

Plumsteadia is the name for a fruiting structure on a glossipterid plant.  It is known from Argentina, Australia, and Antarctica, dating back to a time when those three continents (and in fact all of them) were connected forming the supercontinent, Pangaea.