现生七鳃鳗和盲鳗的 28S、18S rDNA 在所抽样分析中支持圆口类单系。现生序列拓扑不能确定圆口类的化石首现、分歧日期或直接祖先。
claim:taxon:cyclostomata28S and 18S rDNA sequences support the monophyly of lampreys and hagfishes
Mallatt, J.; Sullivan, J.
年份1998
来源角色primary-study
DOI / ID10.1093/oxfordjournals.molbev.a025897
适用范围
拓扑 · taxonomy
An extant sequence topology; it does not set fossil first appearances or divergence time.