Full reference: Y. Qian. 1978. The early Cambrian hyolithids in central and southwest China and their stratigraphical significance. Memoirs of Nanjing Institute of Geology and Palaeontology 11:1-43
Parent taxon: Orthothecida according to J. J. Sepkoski 2002
Sister taxa: Aldanotheca, Allathecidae, Ancheilotheca, Bolitheca, Brevitheca, Bucanotheca, Carinitheca, Chelsonella, Circothecidae, Contitheca, Curtitheca, Devoniotheca, Ebianotheca, Eogloborilus, Eonovitatus, Girvanolithes, Gracilithecidae, Grandicornus, Hexitheca, Inflaticornus, Isititheca, Malykanotheca, Minitheca, Mooritheca, Neobactrotheca, Nephrotheca, Nikatheca, Novitatidae, Novitatus, Orthotheca, Orthothecidae, Panitheca, Petasotheca, Plicitheca, Renitheca, Tcharatheca, Tchuranitheca, Tetratheca, Tetrathecidae
Subtaxa: Lophotheca costellata
Type: Lophotheca costellata
Ecology: stationary epifaunal suspension feeder