The vertebrate limb has been a premier model for studying pattern formation—a striking digit
pattern is formed in human hands, with a thumb forming at one edge and a little finger at the …

In recent years, avian systematics has been characterized by a diminished reliance on
morphological cladistics of modern taxa, intensive palaeornithogical research stimulated by …

Theropods have traditionally been assumed to have lost manual digits from the lateral side
inward, which differs from the bilateral reduction pattern seen in other tetrapod groups. This …

ORNITHOLOGICAL 2 MONOGRAPHS NO. 66 asume que el origen de las aves se sitúa
dentro del grupo de los terópodos. Adicionalmente a este problema, las matrices de Clark …

In the emerging discipline of Evo-Devo, the analysis of gene expression patterns can be
deceptive without a clear understanding of the underlying regulatory strategies. Here, we …

Homologous synteny blocks (HSBs) and evolutionary breakpoint regions (EBRs) in
mammalian chromosomes are enriched for distinct DNA features, contributing to distinct …

Reevolution of lost characters constitutes evidence that the capacity for producing specific
phenotypes may remain latent after a trait is lost and be transmitted over many generations …

Evolution involves interplay between natural selection and developmental constraints,,. This
is seen, for example, when digits are lost from the limbs during evolution,,. Extant archosaurs …

Birds are among the most successful vertebrates on Earth. An important part of our natural
environment and deeply embedded in our culture, birds are studied by more professional …

The origin of birds and avian flight from within the archosaurian radiation has been among
the most contentious issues in paleobiology. Although there is general agreement that birds …