… , early Cretaceous birds were smaller than their closest theropod dinosaur relatives. Here
we report on a new bird from the Early Cretaceous … but is nearly twice as large as the basal …

… the Late Cretaceous is viewed as evidence for their absence, … in the Late Cretaceous but did
not achieve signi�cant diversity … Late Cretaceous vertebrates from Madagascar: implications …

… that rapidly diversified into the broad range of avian … impact. Concentric background rings
demarcate geologic periods: the inner gray circle at the center indicates the Late Cretaceous, …

… ecology in living and extinct birds, and show that the earliest … chosen to minimize the effects
of ecological and evolutionary … While the timing of avian taxonomic diversification remains …

… –Paleogene boundary caused by asteroid impact (denoted by … the avian crown group, which
comprises all living birds and … All specimens from the Early Cretaceous (130.7–120 million …

… right after it first occurred in the early Early Cretaceous. … refuges for the fast growing Early
Cretaceous avian populations. … , An early Cretaceous bird from Spain and its implications for the …

… (noncrown) birds dominate the global Late Cretaceous fossil … We tested the impact of topology
by performing nine iterative … into a deep region of the avian tree that is opaque to detection …

… bird Confuciusornis (5, 6); Sapeornis, the largest bird of the … have shown not only a high
taxonomic diversity but also a … , the present bird also represents the earliest ornithurine known …

… , support an Early Cretaceous origin for birds and mammals over … diversification from its first
appearance in the Late … significance in that these North American latest Cretaceous fossils …

… , the Early Cretaceous, which previously had the poorest avian … on the diversification of
early birds. Our understanding of … in the Late Cretaceous, and of their explosive radiation in the …