Results 21 to 30 of about 181 (88)
Preservação Excepcional de Biomateriais Não Mineralizados em Fósseis do Clado Avialae [PDF]
, 2021 Milhares de fósseis de aves primitivas e diversificadasda Era Mesozoica e Cenozoica têm sido descobertos ao redor do mundo. Destes, centenas de estudos encontraram preservação excepcional de biomateriais mineralizados, permitindo ampliar o conhecimento ...
Alves, Everton Fernando +1 more
core +2 more sources
The impact of poor sampling of polymorphism on cladistic analysis
Cladistics, Volume 32, Issue 3, Page 317-334, June 2016., 2016 Abstract Despite its ubiquity in the natural world, polymorphism is commonly disregarded or poorly sampled in phylogenetic analyses due to deliberate sampling strategy, inadequate sampling effort and limited specimen availability. Poor sampling of intraspecific variation engenders differential sampling of morphs within polymorphic species, which could ...
Akinobu Watanabe
wiley +1 more source
A survey of dinosaur diversity by clade, age, place of discovery and year of description [PDF]
, 2014 Dinosaur diversity is analyzed in terms of the number of valid genera within each major clade, Mesozoic age, place of discovery and year of description. Aves (Archaeopteryx + Neornithes) is excluded. Nomina nuda and nomina dubia are not counted.
Taylor, Michael
core +3 more sources
Behaviors for Which Deinonychosaurs Used Their Feet [PDF]
, 2022 This paper seeks to show for what purpose deinonychosaurs used their feet. Fowler et al., (2011) showed that D. antirrhopus’s feet were closest in function to accipitrids, as they found it was more built for grasping prey than running.
King, Alexander
core +1 more source
Anatomía comparada de los terópodos paravianos Unenlagiidae y sus implicancias en el origen de las aves [PDF]
, 2023 Paraves es el clado de dinosaurios que cuenta con mayor número de especies, ya que por un lado agrupa a terópodos no-avianos extintos como Troodon y Velociraptor, y por otro lado a las aves, únicos dinosaurios vivientes (Avialae: Dinosauria, Gauthier ...
Motta, Matías Javier
core +1 more source
Baraminological Analysis of Jurassic and Cretaceous Avialae [PDF]
, 2020 The baraminic status of Jurassic and Cretaceous Avialae was evaluated using statistical baraminology. Baraminic distance correlation (BDC) and three dimensional multidimensional scaling (MDS) was applied to six previously published character matrices ...
Garner, Paul A. +2 more
core +1 more source
Comments on the morphology of basal paravian shoulder girdle: New data based on unenlagiid Theropods and Paleognath birds [PDF]
, 2021 In 1976 John Ostrom published an enlightening paper about the anatomical transformations in the shoulder girdle and forelimb elements along the origin of birds.
Agnolin, Federico +5 more
core +1 more source
, 2023 We studied an assemblage of teeth from Laje do Coringa, São Luís-Grajaú Basin, Alcântara Formation, State of Maranhão, Brazil. The collection sites are dated as Albian–Cenomanian. Ten teeth were submitted to morphological analysis in Scanning Electron Microscopy, with the goal of identifying materials likely associated with unenlagiine theropod ...
Letizio, Luiz Antonio +2 more
openaire +2 more sources
ESTUDOS BIOMECÂNICOS EM MANIRAPTORIFORMES PLANADORES: Biomechanical investigations on glider Maniraptoriformes [PDF]
, 2021 Many adaptations are necessary to a terrestrial cursorial animal to develop full flying ability. The capability of glide, even being energetically simpler, it still demands a series of morphological adaptations to develop sustainment generative ...
BERTINI, Reinaldo José +1 more
core +1 more source
Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade
Biological Reviews, EarlyView.ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan +2 more
wiley +1 more source