The lower jaw of the Devonian tetrapod Acanthostega is described for the first time.
Redescriptions are provided for the lower jaws of the elpistostegid Panderichthys, the …

The traditional notion of a gap between fishes and amphibians has been closed by a wealth
of fish-like fossil tetrapods, many discovered since the mid 1980s. This review summarizes …

The relationship of the three living groups of sarcopterygians or lobe-finned fish (tetrapods,
lungfish and coelacanths) has been a matter of debate,,,,. Although opinions still differ, most …

The earliest Actinoptergyii (ray-finned fishes) and Sarcopterygii (lobe-finned fishes) have
been studied intensely, and a consistent picture of interrelationships has begun to emerge …

The study of basal sarcopterygians is crucial to an understanding of the relationships and
interrelationships of sarcopterygians, including their relationship to tetrapods. The new …

Recent discoveries of advanced fish-like stem-tetrapods (for example, Panderichthys and
Tiktaalik) have greatly improved our knowledge of the fin-to-limb transition. However, a …

Synopsis The Early Devonian (Lochkovian) sarcopterygian fish Styloichthys has been
interpreted as the immediate sister taxon of the clade comprising both the dipnoan and the …

Among the morphological changes that occurred during the 'fish-to-tetrapod'transition was a
marked reorganization of the cranial endoskeleton. Details of this transition, including the …

The origin of terrestrial vertebrates represents one of the major evolutionary and ecological
transformations in the history of life, and the established timing and environment of this …

Continuous replacement of teeth throughout their lifetimes is a well known phenomenon in
modern sharks. The mechanism involves the continuous generation of embryonic teeth …