†unranked clade Saccorhytida Han et al. 2017
Full reference: J. Han, S. Conway Morris, Q. Ou, D. Shu, and H. Huang. 2017. Meiofaunal deuterostomes from the basal Cambrian of Shaanxi (China). Nature 542:228-232
Parent taxon: Deuterostomia according to J. Han et al. 2017
Sister taxa: Ambulacraria, Chordata, Vetulicolia, Xenacoelomorpha
Subtaxa: Saccorhytidae
Distribution: found only at Hexi ( of China)