An order of regular echinoids belonging to the Diadematacea, established for the two recognized species of Micropyga. They have an aulodont lantern with grooved teeth. Test plating is imbricate, and ambulacra are composed of trigeminate compound plates in which upper and lower elements are reduced to demiplates. Pore pairs are biserially arranged in ambulacral columns, and there are unique umbrellalike aboral tube feet. Micropyga is a deep-water echinoid, found between 480 and 4290 ft (150 and 1340 m) depth in the Indo-West Pacific. There are no fossils that can be placed in this taxon with certainty, but it is possible that the Upper Jurassic Pedinothuria may belong here.