A ubiquitous biological material, keratin represents a group of insoluble, usually high-sulfur
content and filament-forming proteins, constituting the bulk of epidermal appendages such …

The problem of the origin of the bony shell in turtles has a two‐century history and still has
not lost its relevance. First, this concerns the issues of the homology, the sources of …

La comparaison interspécifique du développement embryonnaire chez les tortues est
difficile à cause des différences dans la morphologie, dans le nombre de stades et dans la …

The turtle locomotor system is heavily modified owing to the severe impact of development
of the shell on the body plan of these reptiles. Although limb and girdle osteology of the …

When you write to Linn., next, pray talk to him about tortoises. There are tortoises whose
shells are always open behind and before 'apertura testae anterior,'as he says himself,'pro …

Despite considerable attention that other groups of reptiles have received, few descriptions
of the development and sequences of chondrification and ossification of the entire skeleton …

We investigated the development of the whole skeleton of the soft‐shelled turtle Pelodiscus
sinensis, with particular emphasis on the pattern and sequence of ossification. Ossification …

Abstract Using the Standard Event System (SES) to study patterns of vertebrate
development, we describe a series of 17 embryos of the pleurodire turtle Emydura …

Acknowledgments.......................................................................................................................... 260
References …

Few descriptions of the development and sequence of chondrification and ossification of the
entire skeleton of turtles exist, particularly compared to other groups of reptiles. In this study …