An 18S–28S analysis sampling all 19 then-recognized scyphozoan families supports several clades but finds other families or suborders unresolved or non-monophyletic.
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References / paperEvolutionary relationships among scyphozoan jellyfish families based on complete taxon sampling and phylogenetic analyses of 18S and 28S ribosomal DNA
Bayha, K.M.; Dawson, M.N.; Collins, A.G.; Barbeitos, M.S.; Haddock, S.H.D.
Year2010
Source roleprimary-study
DOI / ID10.1093/icb/icq074
Fitness and scope
taxonomy · topology · methods
18S and 28S analysis sampling all 19 then-recognized scyphozoan families; several familial and ordinal nodes remain unresolved or non-monophyletic.
Claim ledger
Scyphozoa has no supported scalar crown range in the cited evidence: the living-taxon phylogeny does not establish a diagnostic 505 Ma crown scyphozoan, so the former 505–0 Ma display is withheld.
claim:taxon:scyphozoa:range-boundary-rc50