Results 41 to 50 of about 5,020 (237)
Royal Society Open Science, 2022 Dinosaur evolution is marked by numerous independent shifts from bipedality to quadrupedality. Sauropodomorpha is one of the lineages that transitioned from small bipedal forms to graviportal quadrupeds, with an array of intermediate postural strategies ...
Antonio Ballell +2 more
doaj +1 more source
First dinosaur tracks from the Açu Formation, Potiguar Basin (mid-Cretaceous of Brazil)
Anais da Academia Brasileira de Ciências, 2021 We record a new ichnosite bearing dinosaur tracks from the mid-Cretaceous (Aptian? -Cenomanian) of Brazil. The Fazenda dos Pingos ichnosite is situated within a sandstone pavement of the Açu Formation (Açu 3 unit) from the Potiguar Basin in the State of ...
GIUSEPPE LEONARDI +2 more
doaj +1 more source
Osteohistology reveals the smallest adult Jurassic sauropodomorph
Royal Society Open Science, 2023 The earliest sauropodomorphs were small omnivores (less than 10 kg) that first appeared in the Carnian. By the Hettangian, early branching sauropodomorphs (EBSMs) were globally distributed, had variable postures, and some attained large body masses ...
Kimberley E. J. Chapelle +2 more
doaj +1 more source
Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs
The Anatomical Record, EarlyView.Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada +5 more
wiley +1 more source
Cretaceous dinosaur tracks in the Brenton Formation, Western Cape
South African Journal of ScienceDinosaur tracks, probably aged ~132 Ma, have been identified in South Africa’s Western Cape Province, where they occur within the Brenton Formation of the Cretaceous Uitenhage Group.
Charles W. Helm +3 more
doaj +1 more source
A long-forgotten ‘dinosaur’ bone from a museum cabinet, uncovered to be a Japan's iconic extinct mammal, Paleoparadoxia (Desmostylia, Mammalia) [PDF]
Royal Society Open Science, 2018 Here, we report a new ‘discovery’ of a desmostylian fossil in the geological collection at a national university in Japan. This fossil was unearthed over 60 years ago and donated to the university.
Kumiko Matsui +11 more
doaj +1 more source
Intelligent Objective Osteon Segmentation Based on Deep Learning
Frontiers in Earth Science, 2022 Histology is key to understand physiology, development, growth and even reproduction of extinct animals. However, the identification and interpretation of certain structures, such as osteons, medullary bone (MB), and Lines of Arrested Growth (LAGs), are ...
Zichuan Qin +4 more
doaj +1 more source
The Anatomical Record, EarlyView.Abstract Differences in skull and tooth morphology, stomach contents, and estimated bite force between medium‐to‐large sized (≥100 kg) predatory theropod dinosaurs have long been suspected to correlate with differences in their diets and dietary guilds (e.g., hypercarnivory, piscivory).
Cassius Morrison +9 more
wiley +1 more source
The Anatomical Record, EarlyView.Abstract Studies investigating paleopathologies in sauropods remain scarce despite their relative abundance in the fossil record. In this study we report new occurrence of paleopathological features, corresponding to a neoplasm found in a middle caudal vertebra (MCT.R.2120) of an advanced titanosaur from the Presidente Prudente Formation (Bauru Basin ...
Maria Luiza Peres Bertolossi +5 more
wiley +1 more source
The Anatomical Record, EarlyView.The largest silesaurid known from South America is described here, demonstrating that silesaurids reached large body sizes in southwestern Gondwana. This discovery further underscores the widespread geographic distribution and temporal persistence of large silesaurids across Pangea, despite faunal turnovers and environmental events such as the Carnian ...
Rodrigo Temp Müller
wiley +1 more source