The avian eggshell is a remarkable biomineral, which is essential for avian reproduction; its
properties permit embryonic development in the desiccating terrestrial environment, and …

Amniotic eggs are multifunctional structures that enabled early tetrapods to colonize the land
millions of years ago, and are now the reproductive mode of over 70% of all terrestrial …

Calcified eggshells protect developing embryos against environmental stress and contribute
to reproductive success. As modern crocodilians and birds lay hard-shelled eggs, this …

The avian palaeognath phylogeny has been recently revised significantly due to the
advancement of genome-wide comparative analyses and provides the opportunity to trace …

Our understanding of pre-Cretaceous dinosaur reproduction is hindered by a scarcity of
evidence within fossil records. Here we report three adult skeletons and five clutches of …

Thin fossil eggshell from Upper Cretaceous deposits of Europe, characterized by nodular
ornamentation similar to modern gekkotan eggshell, has mostly been interpreted as …

Reptile eggshell ensures water and gas exchange during incubation and plays a key role in
reproductive success. The diversity of reptilian incubation and life history strategies has led …

The fossil record of dinosaur eggs is highly biased; in contrast to the relatively rich egg
record for theropods and sauropodomorphs 1, 2, the characteristics of ceratopsian eggs …

Turtle eggs containing embryos are exceedingly rare in the fossil record. Here, we provide
the first description and taxonomic identification, to our knowledge, of a fossilized embryonic …

Evolution of the terrestrial egg of amniotes (reptiles, birds, and mammals) is often
considered to be one of the most significant events in vertebrate history. Presence of an …