Fossils of early gnathostomes (or jawed vertebrates) have been the focus of study for nearly
two centuries. They yield key clues about the evolutionary assembly of the group's common …

The skin is a barrier between the internal and external environment of an organism.
Depending on the species, it participates in multiple functions. The skin is the organ that …

To connect human biology to fish biomedical models, we sequenced the genome of spotted
gar (Lepisosteus oculatus), whose lineage diverged from teleosts before teleost genome …

Lungfishes are the closest extant relatives of tetrapods and preserve ancestral traits linked
with the water-to-land transition. However, their huge genome sizes have hindered …

Molecular studies suggest that the origin of jawed vertebrates was no later than the Late
Ordovician period (around 450 million years ago (Ma)) 1, 2. Together with disarticulated …

To investigate the predictability of genetic adaptation, we examined the molecular basis of
convergence in hemoglobin function in comparisons involving 56 avian taxa that have …

Dating the tree of life is a core endeavor in evolutionary biology. Rates of evolution are
fundamental to nearly every evolutionary model and process. Rates need dates. There is …

The gnathostome (jawed vertebrate) crown group comprises two extant clades with
contrasting character complements. Notably, Chondrichthyes (cartilaginous fish) lack the …

Rich fossil evidence suggests that many traits and functions related to terrestrial evolution
were present long before the ancestor of lobe-and ray-finned fishes. Here, we present …

Mandibular teeth and dentitions are features of jawed vertebrates that were first acquired by
the Palaeozoic ancestors,–of living chondrichthyans and osteichthyans. The fossil record …