This innovation gave rise to the vertebrate family tree, setting the stage for the explosive diversity that would follow. Picture these ancient fish-like beings swimming through murky seas ...

Features of the new fossil help place hagfish and their relatives on the vertebrate family tree. In the past, scientists have disagreed about where they belonged, depending on how they tackled the ...

Features of the new fossil help place hagfish and their relatives on the vertebrate family tree. In the past, scientists have disagreed about where they belonged, depending on how they tackled the ...

The Tethymyxine tapirostrum hagfish fossil suggests a new hypothesis for the structure of the vertebrate family tree, with hagfish and other eel-like creatures branching off early from the lineage ...

A small team of biologists at Stanford University has found evidence that approximately one-third of all vertebrate ...

In the days since Murchison, fossil finds from the Silurian and older layers of rock have been unevenly spread across the vertebrate family tree. Armoured jawless fishes known as ostracoderms now ...

implying blastula and neural crest stem cells evolved at the beginning of the vertebrate family tree. The researchers hypothesized that pou5, which was in both lamprey and Xenopus blastula cells ...