"Agathis" jurassica is an extinct coniferous tree found in the Talbragar Fish Beds of New South Wales.

[3] The Talbragar Fish Beds are a well known geological site to the Northwest of Sydney and Wollemi National Park in Southeastern Australia that have produced thousands of incredibly preserved individual fossil specimens.

The area is believed to have been a large and shallow freshwater lake that was surrounded by lush, woody vegetation, classified as a ‘Kauri Pine’ forest.

[7] The lake supported a large population of fish as well as a diverse range of flora along the shore that gave home to many insects as well.

Fossilization in this area occurred in the Early to Middle Jurassic where Australia was still a part of Gondwana, under the Tethys Sea, and the site's climate was believed to be moderately warm with increased carbon dioxide levels in the atmosphere that allowed for lush vegetation to flourish.