منابع مشابه
Functional Morphometric Analysis of the Furcula in Mesozoic Birds
The furcula displays enormous morphological and structural diversity. Acting as an important origin for flight muscles involved in the downstroke, the form of this element has been shown to vary with flight mode. This study seeks to clarify the strength of this form-function relationship through the use of eigenshape morphometric analysis coupled with recently developed phylogenetic comparative...
متن کاملEstimating cranial musculoskeletal constraints in theropod dinosaurs
Many inferences on the biology, behaviour and ecology of extinct vertebrates are based on the reconstruction of the musculature and rely considerably on its accuracy. Although the advent of digital reconstruction techniques has facilitated the creation and testing of musculoskeletal hypotheses in recent years, muscle strain capabilities have rarely been considered. Here, a digital modelling app...
متن کاملExtreme Ontogenetic Changes in a Ceratosaurian Theropod
Ontogenetic variation is documented within many dinosaur species, but extreme ontogenetic changes are rare among dinosaurs, particularly among theropods. Here, we analyze 19 specimens of the Jurassic ceratosaurian theropod Limusaurus inextricabilis, representing six ontogenetic stages based on body size and histological data. Among 78 ontogenetic changes we identify in these specimens, the most...
متن کاملForebrain Enlargement among Nonavian Theropod Dinosaurs
The gross size and shape of the brain is often preserved in extinct vertebrates with well-ossified braincases, such as dinosaurs. The volume within the braincase, termed the endocast, is the space occupied by the brain, cerebrospinal fluid, and surrounding tissues. Endocasts of most nonavian dinosaurs differ little in size and shape from those of living reptiles (Jerison, 1969, 1973; Hopson, 19...
متن کاملThe first well-preserved coelophysoid theropod dinosaur from Asia.
Coelophysoid dinosaurs represent the earliest major radiation of neotheropods. These small-to-medium-sized agile bipeds lived throughout much of Pangaea during the Late Triassic-arly Jurassic. Previously reported coelophysoid material from Asia (excluding the Gondwanan territory of India) is limited to two specimens that comprise only limb fragments. This paper describes a new genus and species...
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ژورنال
عنوان ژورنال: Journal of Morphology
سال: 2009
ISSN: 0362-2525,1097-4687
DOI: 10.1002/jmor.10724