Synonym: Urochordata Lankester 1877

Parent taxon: Chordata according to J. S. Nelson et al. 2016

See also Brusca et al. 2016, Dineley and Metcalf 1999, Edgecombe et al. 2011, Jaekel 1911, Nanglu et al. 2023, Nielsen 2012, Nielsen 2012 and Sepkoski 2002

Sister taxa: Cephalochordata, Conodontophorida, Craniata, Metaspriggina, Olfactores, Pikaidae, Undichna, Vertebrata

Subtaxa: Appendicularia Ascidiacea Catellocaula Cystodytes Megasiphon Micraseites Shankouclava

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Ecology: stationary low-level epifaunal suspension feeder

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