New evidence shows that teeth evolved with a greater degree of independence from jaws
than previously considered. Pharyngeal denticles occur in jawless fish and also in early …

Placoderms, the most diverse group of Devonian fishes, were globally distributed in all
habitable freshwater and marine environments, like teleost fishes in the modern fauna. Their …

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

Placoderms are extinct jawed fishes of the class Placodermi and are basal among jawed
vertebrates. It is generally thought that teeth are absent in placoderms and that the …

The teeth of gnathostomes (jawed vertebrates) show rigidly patterned, unidirectional
replacement that may or may not be associated with a shedding mechanism. These …

Osteichthyans comprise two divisions, each containing over 32,000 living species [1]:
Sarcopterygii (lobe-finned fishes and tetrapods) and Actinopterygii (ray-finned fishes) …

The evolutionary origin of the vertebrate jaw persists as a deeply puzzling mystery. More
than 99% of living vertebrates have jaws, but the evolutionary sequence that ultimately gave …

New specimens of acanthothoracid placoderms and related forms (Romundina,
Murrindalaspis, Brindabellaspis) are described, illustrating aspects of placoderm anatomy in …

The fossil group Placodermi is the most phylogenetically basal of the clade of jawed
vertebrates but lacks a marginal dentition comparable to that of the dentate Chondrichthyes …

The correlation of the origin of teeth with jaws in vertebrate history has recently been
challenged with an alternative to the canonical view of teeth deriving from separate skin …