BACKGROUND More than 30 different lineages of amphibians, reptiles, birds, and
mammals have independently invaded oceans ecosystems. Prominent examples include …

The colonisation of freshwater and marine ecosystems by land vertebrates has repeatedly
occurred in amphibians, reptiles, birds and mammals over the course of 300 million years …

INTRODUCTION The iterative evolution of secondarily marine tetrapods since the Paleozoic
offers the promise of better understanding how the anatomy and ecology of animals change …

Secondary aquatic adaptations evolved independently more than 30 times from terrestrial
vertebrate ancestors,. For decades, non-avian dinosaurs were believed to be an exception …

The fossil record of cetaceans documents how terrestrial animals acquired extreme
adaptations and transitioned to a fully aquatic lifestyle,. In whales, this is associated with a …

Numerous amniote groups adapted to an aquatic life. This change of habitat naturally led to
numerous convergences. The various adaptive traits vary depending on the degree of …

The Eocene history of cetacean evolution is now represented by the expansive fossil record
of archaeocetes elucidating major morphofunctional shifts relating to the land to sea …

Cynthiacetus peruvianus is a Dorudon-like basilosaurid (Cetacea, Basilosauridae), being
one of the largest members of the family. The holotype of this species is a sub-complete …

The interest in mammalian palaeohistology has increased dramatically in the last two
decades. Starting in 1849 via descriptive approaches, it has been demonstrated that bone …

Pachycetus paulsonii, Pachycetus wardii, and Antaecetus aithai are middle Eocene
archaeocete whales found in Europe, North America, and Africa, respectively. The three are …