Productida

Productida; Temporal range: Silurian–Early Triassic PreꞒ Ꞓ O S D C P T J K Pg N
	Productid brachiopod ventral valve interior; Roadian, Guadalupian (Middle Permian); Glass Mountains, Texas.
Scientific classification
Kingdom:	Animalia
Phylum:	Brachiopoda
Class:	†Strophomenata
Order:	†Productida; Sarytcheva & Sokolskaya, 1959
Suborders
	†Chonetidina; †Lyttoniidina; †Productidina; †Strophalosiidina;

Productida is an extinct order of brachiopods in the extinct class Strophomenata. Members of Productida first appeared during the Silurian.^[1] They represented the most abundant group of brachiopods during the Permian period, accounting for 45-70% of all species. The vast majority of species went extinct during the Permian-Triassic extinction event, though a handful survived into the Early Triassic.^[2] Many productids are covered in hollow tubular spines, which are characteristic of the group. A number of functions for the spines have been proposed, including as a defensive mechanism against predators.^[3]