Parent taxon: Metacopida according to J. J. Sepkoski 2002
Sister taxa: Acuprisma, Amphicostella, Bairdites, Barychilina, Beckerhealdia, Bekena, Birdsallella, Bufina, Bythocyproidea, Catacoraites, Chapmanites, Conbathella, Cooperatia, Coryellites, Costatia, Craterellina, Cyrtocyprus, Diura, Endolophia, Eriella, Eucraterellina, Euglyphella, Eustephanella, Favulella, Healdioides, Heterma, Hyphasmaphora, Incisurella, Janusella, Jenningsina, Longiscula, Luniprisma, Menoeidina, Octonaria, Octonariellina, Paracavellina, Phreatura, Planoria, Platychilella, Polyzygia, Ponderodictya, Poniklacella, Primitivothilipsurella, Robsoniella, Ropolonellus, Rothella, Rothellina, Rudderina, Scalptina, Semihealdioides, Seminolites, Silenis, Stibus, Strepulites, Svatojonitella, Thlipsura, Thlipsurella, Thlipsurina, Thlipsuroides, Thlipsuropsis, Trypetera, Tubulibairdia, Tumidella, Unicornites, Varicobairdia, Venula, Voronina, Wangiiawania
Subtaxa: none
Ecology: epifaunal suspension feeder