28S and 18S rDNA from living lampreys and hagfishes support cyclostome monophyly in the sampled analyses. Extant sequence topology does not set the cyclostome fossil first appearance, divergence date or direct ancestry.
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References / paper28S and 18S rDNA sequences support the monophyly of lampreys and hagfishes
Mallatt, J.; Sullivan, J.
Year1998
Source roleprimary-study
DOI / ID10.1093/oxfordjournals.molbev.a025897
Fitness and scope
topology · taxonomy
An extant sequence topology; it does not set fossil first appearances or divergence time.