Parent taxon: Libristoma according to N.C. Hughes 1994
See also Sepkoski 2002
Sister taxa: none
Subtaxa: Aethodionide Ajacicrepida Alsataspididae Andrarinidae Anomocarellidae Aphelaspididae Asaphina Asaphoidea Auritamidae Bohemillidae Borogothus Borthaspis Boschchekulia Brandysops Bumastides Callaspis Camaraspoides Caulaspis Caznaia Ceratolithus Ceratopygidae Ceronocare Chondranomocare Clavatellus Cremastoglottos Cyclopygidae Cyclopygoidea Digrypos Dikelocephalacea Dikelocephalidae Dikelocephalinidae Dikelocephalopsis Dionididae Dipleuropyge Doremataspis Ectenaspis Eirelithus Elkia Elongatanileus Emanuelaspis Eoapatokephalus Eoptychaspis Eowuhuia Erbenia Eurekiidae Flabellocephalus Galerosaukia Glyphopeltis Gogiura Golasaphus Homalopyge Hukasawaia Hungaiidae Idahoiidae Isyrakopeltis Kaniniella Kazelia Kobayashella Kogenium Kokuria Lakaspis Lannacus Liaoningella Lichengia Lingukainella Liostracinidae Lophoholcus Lycophron Lynaspis Macropygella Macrotoxus Mansuyella Mapanopsis Meeria Metayuepingia Mioptychopyge Monkaspididae Nadiyella Nanlingia Neopeltis Nileidae Nomadinis Norasaphus Notoaphelaspis Osceolia Paivinia Palella Parabolinoididae Parabumasttides Paramansuyella Paraphillipsinella Paratrinucleus Pedinocephalina Pedinocephalus Plecteuloma Plesiyuepingia Portentosus Psalaspis Pseudampyxina Pseudocyclopyge Pseudoptyocephalus Pterocephaliidae Ptychaspididae Quitacetra Quitalia Raphiophoridae Remopleuridae Rhyssometopidae Rhyssometropus Richardsonellidae Saimachia Saukiidae Saukioides Scinocephalus Sigmakainella Sinosaukia Stenochilina Stigmacephaloides Taihungshaniidae Tchukeraspis Telaemarrolithus Temnoura Theodensia Toernquistina Tramoria Trigonoaspis Trinucleidae Walcottaspis Xenasaphus Yumenaspis
Ecology: fast-moving low-level epifaunal deposit feeder