Full reference: A. Y. Rozanov, V. V. Missarzhevsky, N.A. Volkova, L.G. Voronova, I.N. Krylov, B.M. Keller, I.K. Korolyuk, K. Lendzion, R. Mikhnyar, N.G. Pykhova, and A.D. Sidorov. 1969. Tommotskiu jarus i problema nizhney granisty kembriya. Trudy Geoligske Institut Leningrad 206:1-379
Parent taxon: Orthothecida according to P. Y. Parkhaev and Y. Demidenko 2010
Sister taxa: Aldanotheca, Ancheilotheca, Bolitheca, Brevitheca, Bucanotheca, Carinitheca, Chelsonella, Circothecidae, Contitheca, Curtitheca, Devoniotheca, Ebianotheca, Eogloborilus, Eonovitatus, Girvanolithes, Gracilithecidae, Grandicornus, Hexitheca, Inflaticornus, Isititheca, Lophotheca, Malykanotheca, Minitheca, Mooritheca, Neobactrotheca, Nephrotheca, Nikatheca, Novitatidae, Novitatus, Orthotheca, Orthothecidae, Panitheca, Petasotheca, Plicitheca, Renitheca, Tcharatheca, Tchuranitheca, Tetratheca, Tetrathecidae
Subtaxa: Allatheca, Antiquatheca, Doliutus, Exilitheca, Majatheca
Type: Allatheca
Ecology: stationary epifaunal suspension feeder