References / paperA stem group echinoderm from the basal Cambrian of China and the origins of Ambulacraria
Topper, T.P.; Guo, J.; Clausen, S.; Skovsted, C.B.; Zhang, Z.
Year2019
Source roleprimary-study
DOI / ID10.1038/s41467-019-09059-3
Fitness and scope
taxonomy · topology · morphology · range
Open-access version of record under CC BY 4.0.
Claim ledger
taxonomy · contestedYanjiahella biscarpa is a Fortunian deuterostome whose proposed placement as a stem echinoderm is contested because no unambiguous echinoderm synapomorphy or stereom is preserved; it is not used here to set the Echinodermata range.
claim:taxon:echinodermata:yanjiahella-affinity