Lungfishes are commonly considered to be the sister group to tetrapods. They appeared around 415 million years ago, then rapidly evolved, diversified and spread. Although many morphological characteri...

Neural crest evolution reassembled ancient programs in pigment cell lineage, resulting in vertebrate innovations.

The armoured jawless fishes (‘ostracoderms’) are major and widespread components of middle Palaeozoic ecosystems. As successive branches on the gnathostome stem lineage, they represent the early sequ...

Integration of neural crest cells into the endostyle developmental program promoted its evolution into the thyroid gland.

Imaging of a Devonian jawless fish reveals advanced features previously thought to be exclusive to jawed vertebrates, challenging the idea that jaws were the primary driver for the evolution of derived traits in the vertebrate body plan.

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Re-examination of the presumed Cambrian fossil fish Anatolepis reveals previous misidentification of aglaspidid sensory structures as dentine, a vertebrate sensory tissue, showing it to be a...

Fossil data shed light on a debate about when vertebrate dental tissues arose by assigning an early sensory structure to arthropods rather than to vertebrates.

Fossil data shed light on a debate about when vertebrate dental tissues arose by assigning an early sensory structure to arthropods rather than to vertebrates.

In this study, we used fluorochrome labels in captive leopard geckos (Eublepharis macularius) to track bone growth and intraskeletal variability from embryonic to adult growth stages. Overall, the ti...

Abstract. Evolutionary stasis characterizes lineages that seldom speciate and show little phenotypic change over long stretches of geological time. Althoug

An increasing number of evolutionary studies seek to quantify the morphological complexity of organisms, particularly those comprising serially homologous elements at different hierarchical levels of ...

X-ray analysis of bony scale shows vertebrates developed ability to remodel and repair bone much earlier than thought