Results 61 to 70 of about 989 (201)

An exquisitely preserved young iguanodontian from the Upper Jurassic of Tanzania sheds light on skeletal fusion patterns within Archosauria

open access: yesPapers in Palaeontology, Volume 12, Issue 3, May/June 2026.
Abstract Dysalotosaurus lettowvorbecki (Ornithopoda, Dinosauria) is a small‐sized dryosaurid iguanodontian known from various isolated remains collected from the Tendaguru Formation (Upper Jurassic, Tanzania). Micro‐computed tomography of a small individual encased in a block offered a unique opportunity to describe c.
Riccardo Rocchi   +3 more
wiley   +1 more source

Inferred presence of extraoral tissues in Triassic archosauromorphs and the evolutionary implications for the clade Sauropsida

open access: yesPalaeontology, Volume 69, Issue 3, 2026.
Abstract Recent work has suggested that the presence of extraoral soft tissues (‘lips’), in the form of labial scales in theropod dinosaurs, could be inferred based on: anteroposteriorly distributed foramina in the rostral bones, similar to extant lepidosaurs; vertically projected teeth; uniform enamel thickness in maxillary teeth; and an allometric ...
Rafael Terras   +9 more
wiley   +1 more source

Figure 18. Scelidosaurus. Skull diagrammatics. A in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships

open access: yes, 2021
Figure 18. Scelidosaurus. Skull diagrammatics. A, pivot point between the squamosal and quadrate head viewed laterally, joint (q-sq.j) highlighted in black.
Norman, David B
core   +1 more source

A new taxon of saurischian dinosaur from the Coelophysis Quarry of New Mexico, USA (Triassic: latest Norian or Rhaetian) highlights herrerasaurian diversity in the latest Triassic

open access: yesPapers in Palaeontology, Volume 12, Issue 2, March/April 2026.
Abstract The most complete record of the earliest dinosaur lineages is from the Carnian from the higher latitudes of Pangea (e.g. present‐day Brazil, Argentina), but dinosaurian assemblages from the upper stages of the Upper Triassic are better known from the low latitudes of Pangea (present day southwestern USA).
Simba Srivastava, Sterling J. Nesbitt
wiley   +1 more source

Figure 13 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships

open access: yes, 2021
Figure 13. Partially transparent neurocranium to show the approximate structure of the brain, the principal cranial nerves and blood vessels. Abbreviations: c.art, carotid artery; Cbl, cerebellum; Ce, cerebral lobes; cn.
Norman, David B
core   +1 more source

Bone histology of Protoceratops andrewsi from the Late Cretaceous of Mongolia and its biological implications [PDF]

open access: yesActa Palaeontologica Polonica, 2018
Protoceratops andrewsi is one of the best known and abundant ornithischian dinosaurs from the Djadokhta Formation (Late Cretaceous, Mongolia) and a subject of many morphological studies.
Łucja Fostowicz-Frelik   +1 more
doaj   +1 more source

Braincase anatomy and palaeoneurology of Venetoraptor gassenae, a lagerpetid pterosauromorph from the Late Triassic of southern Brazil

open access: yesPalaeontology, Volume 69, Issue 2, 2026.
Abstract There is a growing consensus that pterosaurs and the flightless Lagerpetidae are closely related. This relationship is supported by apomorphies throughout the skeleton, including endocranial character states such as a well‐developed floccular fossa and a tall anterior semicircular canal. Our knowledge of lagerpetid anatomy has been improved by
Lísie V.S. Damke   +6 more
wiley   +1 more source

Figure 4. Scelidosaurus harrisonii Owen, 1861 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships

open access: yes, 2021
Figure 4. Scelidosaurus harrisonii Owen, 1861. Cranial anatomy reconstructed in: A, lateral; B, dorsal views (modified from Norman, 2020a: figs 8, 9).Published as part of Norman, David B, 2021, Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the
Norman, David B
core   +1 more source

Insight on the anatomy, systematic relationships, and age of the Early Cretaceous ankylopollexian dinosaur Dakotadon lakotaensis [PDF]

open access: yesPeerJ, 2015
Knowledge regarding the early evolution within the dinosaurian clade Ankylopollexia drastically increased over the past two decades, in part because of an increase in described taxa from the Early Cretaceous of North America. These advances motivated the
Clint A. Boyd, Darrin C. Pagnac
doaj   +2 more sources

The early origin of Iguanodontia: new insights into the macroevolution, diversity and biogeography of the clade

open access: yesPalaeontology, Volume 69, Issue 2, 2026.
Abstract Iguanodontia (Dinosauria, Ornithischia) is a speciose group of herbivorous dinosaurs that include the famous genus Iguanodon, one of foundational members of the clade Dinosauria. Despite their very long history of research, several aspects of their systematic relationships and their evolutionary history remain somewhat nebulous.
Filippo Maria Rotatori   +3 more
wiley   +1 more source

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