Early Cretaceous troodontine troodontid (Dinosauria: Theropoda) from the Ohyamashimo Formation of Japan reveals the early evolution of Troodontinae

K Kubota, Y Kobayashi, T Ikeda - Scientific Reports, 2024 - nature.com
A new troodontid dinosaur, Hypnovenator matsubaraetoheorum gen. et sp. nov., is
described based on an articulated postcranial skeleton recovered from the fluvial deposits of …

Formation of ammonite concretions through organic decomposition in the iron-reduction zone

Y Muramiya, H Yoshida, N Katsuta… - Journal of …, 2024 - pubs.geoscienceworld.org
The ammonites in spherical carbonate concretions often preserve their original three-
dimensional (3-D) shell shapes and detailed fragile structures. However, the formation …

Cursorial ecomorphology and temporal patterns in theropod dinosaur evolution during the mid-Cretaceous

K Kubo, Y Kobayashi - Royal Society Open Science, 2025 - royalsocietypublishing.org
Coelurosauria, including modern birds, represents a successful group of theropod dinosaurs
that established a high taxonomic diversity and significant morphological modifications. In …

Functional space analyses reveal the function and evolution of the most bizarre theropod manual unguals

Z Qin, CC Liao, MJ Benton, EJ Rayfield - Communications Biology, 2023 - nature.com
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 …

Osteology of the derived Therizinosaur Nothronychus with evidence for convergence in dinosaurian evolution

DK Smith, DD Gillette - Zoological Journal of the Linnean Society, 2024 - academic.oup.com
Therizinosaurs were a taxon of unusual theropods from North America and Asia. The
derived therizinosaur Nothronychus graffami possessed a synsacrum and hip convergent …

First discovery of large-bodied dromaeosaurid fossil materials (Dinosauria: Theropoda) from the Upper Cretaceous Quantou Formation, Songliao Basin, Northeast …

L Yang, X Li, J Chen, RR Reisz - Cretaceous Research, 2024 - Elsevier
This paper reports the first discovery of large-bodied dromaeosaurid fossil materials
(Dinosauria: Theropoda) from the lower Upper Cretaceous Quantou Formation, in …

[HTML][HTML] Pliosaurid (Reptilia: Sauropterygia) remains from the Upper Cretaceous of Japan, and their biostratigraphic and paleogeographic significance

T Sato, K Nagai, H Echizenya, T Shinmura, Y Hikida… - Cretaceous …, 2023 - Elsevier
Four indeterminate pliosaurid remains from the Cenomanian and Turonian of the Yezo
Group in Hokkaido, northern Japan, are described/re-described. Although their fragmentary …

Evaluating the paleoecology of the Megaraptora (Dinosauria: Theropoda) through biomechanical approaches

C Yun - Spanish Journal of Palaeontology, 2024 - turia.uv.es
Los terópodos megaraptores representan un linaje enigmático e inusual de dinosaurios que
se caracterizan por su bauplan único que incluye un cráneo bajo y alargado y extremidades …

[PDF][PDF] 日本産の中生代恐竜化石目録2022 年版

K Katsuhiro - Bull. Gunma Mus. Natu. Hist, 2023 - researchgate.net
日本産の中生代恐竜化石目録 2022年版 A list of Mesozoic dinosaur fossils from Japan in
2022 Page 1 群馬県立自然史博物館研究報告(27):157-170, 2023 Bull.Gunma Mus.Natu.Hist.(27):157-170 …