References / paperThe phylogeny of the Craniata, with particular reference to the significance of fossil ‘agnathans’
Janvier, P.
Year1981
Source rolesystematic-review
DOI / ID10.1080/02724634.1981.10011886
Fitness and scope
taxonomy · topology
Treats traditional ostracoderms as multiple armored jawless lineages rather than one natural clade.
Claim ledger
taxonomy · mediumA craniate phylogenetic review separates traditional armored fossil ‘agnathans’ among several lineages on the jawed-vertebrate stem. Ostracodermi is therefore retained only as a historical navigation grade, not a monophyletic taxon, direct ancestor or globally bounded range.
claim:taxon:ostracodermi