Birds evolved from and are phylogenetically recognized as members of the theropod
dinosaurs; their first known member is the Late Jurassic Archaeopteryx, now represented by …

The study of the origin and early evolution of birds has never produced as much excitement
and public attention as in the past decade. Well preserved and abundant new fossils of birds …

HUMIC substances are heterogeneous high-molecular-weight organic materials which are
ubiquitous in terrestrial and aquatic environments. They are resistant to microbial …

637 ine bird Ambiortus (9), from the early Cretaceous of Mongolia, the two major lineages of
birds, subclasses Sauriurae (enantiornithines+ Archaeopteryx) and Ornithurae, were coeval …

Abstract Charles Darwin commented that Ichthyornis, as one of the “toothed birds” from the
Late Cretaceous of Kansas, offered some of “the best support to the theory of evolution”(in …

This new text provides an integrated view of the forces that influence the patterns and rates
of vertebrate evolution from the level of living populations and species to those that resulted …

The origins of angiosperms are still debated, despite many years of work by scientists from
differing disciplines. The progress made toward resolving the problem is reviewed in this …

This work serves as a compendium of anatomical resources upon which a companion
phylogenetic analysis of Aves and related Theropoda (Avialae) was based. Following a brief …

One of the leading textbooks in its field, Bringing Fossils to Life applies paleobiological
principles to the fossil record while detailing the evolutionary history of major plant and …

THE Lower Cretaceous lithographic limestones from Las Hoyas (province of Cuenca, Spain)
have yielded important vertebrate fossil remains. We report here a new specimen, the first …