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

Modern representatives of chondrichthyans (cartilaginous fishes) and osteichthyans (bony
fishes and tetrapods) have contrasting skeletal anatomies and developmental trajectories …

The discovery of Entelognathus revealed the presence of maxilla, premaxilla, and dentary,
supposedly diagnostic osteichthyan bones, in a Silurian placoderm. However, the …

Recent advances in synchrotron imaging allow us to study the three‐dimensional (3D)
histology of vertebrate fossils, including microfossils (eg teeth and scales) of early jawed …

Ganoine is a different enamel from “true” enamel. The crystallites end in the middle of the
projection of epidermal cell onto the ganoine surface. In contrast,“true” enamel shows the …

Newly discovered fossils from the Silurian and Devonian periods are beginning to challenge
embedded perceptions about the origin and early diversification of jawed vertebrates …

Discoveries of putative stem sarcopterygians from the late Silurian and Early Devonian of
South China have increased our knowledge of the initial diversification of osteichthyans …

Background Fishes are extremely speciose and also highly disparate in their fin
configurations, more specifically in the number of fins present as well as their structure …

An apparent absence of Silurian fishes more than half-a-metre in length has been viewed as
evidence that gnathostomes were restricted in size and diversity prior to the Devonian. Here …