The keystone species concept is a useful ecological concept to explain how some species exert a strong force on their community structure; this paper strives to expand the definition to include species that are used in zootherapy. i. e. the use of animals for medicinal purposes. https://www.diegojavierfares.com/limited-save-1-64-Lowndes-2010-Triple-Eight-Race-Engineering-Suits-Holden-VE-Commodore-64168-special-save/