Over the years, numerous hypotheses for how vertebrates first appeared and developed have emerged ... and therefore he says it was “a little bit of a surprise” to see the fish definitively classified ...

One of the first vertebrates that may have ventured onto land, whose remains date from about 364 million years ago, is called Ichthyostega. Although fishlike in many ways, it had robust bony legs ...

A fossil creature from the Devonian discovered more recently has been hailed as a vital link between fish and the first vertebrates to walk on land. Found in the Canadian Arctic in 2004 ...

When fishes, the first vertebrates, evolved, the gene network that builds gill cartilage from those invertebrates was recycled to make fish gills, even as fish evolved a new type of bony skeleton.

These fossils demonstrate the diversity of jawed vertebrates early on during their evolution. Alienacanthus is a member of an extinct group of fish called placoderms, which are some of the first ...

This important study explores the conserved role of IgM in both systemic and mucosal antiviral immunity in teleosts, challenging established views on the differential roles of IgT and IgM. The ...