[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
The early evolution of feathers: fossil evidence from Cretaceous amber of France.
Vincent Perrichot, Loïc Marion, Didier Néraudeau, Romain Vullo, and Paul
Tafforeau (FirstCite) The early evolution of feathers: fossil evidence from
Cretaceous amber of France. Proc. R. Soc. B. 10.1098/rspb.2008.0003
Abstract: "The developmental stages of feathers are of major importance in the
evolution of body covering and the origin of avian flight. Until now, there
were significant gaps in knowledge of early morphologies in theoretical stages
of feathers as well as in palaeontological material. Here we report fossil
evidence of an intermediate and critical stage in the incremental evolution of
feathers which has been predicted by developmental theories but hitherto
undocumented by evidence from both the recent and the fossil records. Seven
feathers have been found in an Early Cretaceous (Late Albian, ca 100Myr) amber
of western France, which display a flattened shaft composed by the still
distinct and incompletely fused bases of the barbs forming two irregular vanes.
Considering their remarkably primitive features, and since recent discoveries
have yielded feathers of modern type in some derived theropod dinosaurs, the
Albian feathers from France might have been derived either from an
early bird or from a non-avian dinosaur."
Helping your favorite cause is as easy as instant messaging. You IM, we give.