Araucaria arucana (Monkey Puzzle Tree) Fossil Wood, from Madagascar (REF:FWN5)

Fossil wood is wood that is preserved in the fossil record. Fossil wood may or may not be petrified (petrified wood is fossil wood that have turned to stone through the process of whats called permineralisation)

The study of fossil wood is sometimes called palaeoxylology, with a "palaeoxylologist" somebody who studies fossil wood.

Araucaria Arucana (or Monkey Puzzle Tree)

Araucaria Arucana or as it is commonly called Monkey Puzzle Tree, is an evergreen tree native to Chile and Argentina, with fossil Araucaria from the Triassic Period found in Madagascar. 

Why it has the nick name Monkey Puzzle Tree, is believed to of come from a barrister called Charlie Austin, who remarked, "It would puzzle a monkey to climb that” which led to the species receiving the Monkey Puzzler, then Monkey Puzzle name. Whether this is a true fact some may argue.