Alvarezsauria is a group of morphologically distinctive, medium-to small-sized later-
diverging coelurosaurian theropod dinosaurs, whose record ranges from the Late Jurassic …

Alvarezsauria is a group of early-branching maniraptoran theropods that are distributed
globally from the Late Jurassic to the latest Cretaceous. Despite recent increases in the …

Tyrannosaurids were the apex predators of Late Cretaceous Laurasia and their status as
dominant carnivores has garnered considerable interest since their discovery, both in the …

Parvicursor remotus Karhu & Rautian,, based on a fragmentary skeleton from the
Campanian Barungoyot Formation at Khulsan, in the Gobi Desert of Mongolia, is re …

Background Living birds comprise the most speciose and anatomically diverse clade of
flying vertebrates, but their poor early fossil record and the lack of resolution around the …

Maniraptoran dinosaurs include the ancestors of birds, and most used their hands for
grasping and in flight, but early-branching maniraptorans had extraordinary claws of …

The anatomy of the alvarezsaurian tail has received relatively little attention in the
paleontological literature, even though it shows a peculiar combination of anatomical …

Some of the smallest examples of dinosaurian body size are from alvarezsaurians, an
enigmatic group of maniraptoran coelurosaurians with a peculiar combination of anatomical …

The fossil record of dinosaurs is a rich, if biased, one with nearly complete skeletons, partial
skeletons, and isolated parts found in diverse, well-studied faunal assemblages around the …

Background Range of motion in the forelimb of the Upper Cretaceous theropod dinosaur
Mononykus olecranus, a member of the family Alvarezsauridae, has previously been …