Agathis microstachya was created in 1918.

Agathis trees are gymnosperms, from the Araucariaceae family.

Kauri tree.

According to my research and personal experience, both alder and agathis are considered soft woods, but I believe alder is the harder of the two. But wood densities can vary greatly. Agathis is in the pine family, so it would stand to reason that it's soft. The alder wood guitar bodies that I own don't seem that soft to me! Hope that helps.

Kauri (Agathis australis).