A four-gene supermatrix resolves many sampled fern relationships while retaining poorly supported branches; the result describes an extant-heavy sample, not a complete Filicopsida history or fossil range.
claim:taxon:filicopsidaTowards Resolving the Complete Fern Tree of Life
Lehtonen, S.
Year2011
Source roleprimary-study
DOI / ID10.1371/journal.pone.0024851
Fitness and scope
taxonomy · topology · methods
Four-gene supermatrix analysis of sampled living ferns; missing data and taxon concepts bound the recovered topology.
Claim ledger
Filicopsida has no supported scalar range here: the historical class concept is not aligned with a single crown or total group, and the review questions Devonian fern assignments while recognizing firmer Lower Carboniferous filicalean evidence; the former 360–0 Ma display is withheld.
claim:taxon:filicopsida:range-boundary-rc50