ArchaeolepadomorphaArchaeolepadomorpha is an extinct order of barnacles in the class Thecostraca. There are at least 3 families and more than 40 described species in Archaeolepadomorpha.FamiliesThese families belong to the order Archaeolepadomorpha: Archaeolepadidae Gale, 2019 Myolepadidae Gale, 2015 in Gale & Sørensen, 2015 Stramentidae Withers, 1920