Convincing Evidence of Carnivorous Diet in Alvarezsaurian Dinosaur DOI Open Access
Shuo Wang, Nuo Ding, Waisum Ma

и другие.

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Дек. 10, 2024

A dietary shift from carnivory to insectivore has been proposed explain the dramatic morphological evolution of alvarezsaurians, particularly adaptation related manual digital reduction and body size miniaturization. However, based solely on shifts, this hypothesis lacked direct evidence support either or insectivore. Here, we present first convincing for derived intestinal contents Early Cretaceous Bannykus wulatensis . Our analysis revealed significantly higher levels calcium phosphorus in compared surrounding sandstone. Scanning electron microscopy identified hard tissue debris possible soft tissues by phosphatized bacteria tightly packed hollow microspheres, suggesting that were strongly pseudomorphed microbes during fossilization. Raman spectroscopy showed characteristic peaks indicative bone-derived material, consistent with appeared contents. results suggest had a carnivorous diet strong chemical digestion, which likely compensated its delicate cranial structures small teeth. These imply if occurred, it took place later alvarezsaurian evolution, probably coinciding size.

Язык: Английский

Evidence of piscivorous diet in an enantiornithine bird from the Lower Cretaceous of Brazil DOI

Fernando Luiz Kilesse Salgado,

Luis M. Chiappe, Reiner Neumann

и другие.

Cretaceous Research, Год журнала: 2025, Номер unknown, С. 106161 - 106161

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0
Direct evidence of carnivory in the early-diverging Alvarezsaurian <i>Bannykus</i> DOI
Shuo Wang, Nuo Ding, Waisum Ma

и другие.

The Innovation Geoscience, Год журнала: 2025, Номер unknown, С. 100143 - 100143

Опубликована: Янв. 1, 2025

<p>A dietary shift from carnivory to insectivory has been proposed explain the morphological evolution of alvarezsaurians, particularly adaptive manual digital reduction and body size miniaturization. However, based solely on shifts, this hypothesis lacks direct evidence support either or insectivory. Here, we present first for derived intestinal contents Early Cretaceous <i>Bannykus wulatensis</i>. Our analysis revealed significantly higher levels calcium phosphorus in compared surrounding sandstone. Scanning electron microscopy identified hard tissue debris possible soft tissues surrounded by phosphatized bacteria tightly packed hollow microspheres, suggesting that were strongly pseudomorphed microbes during fossilization. Raman spectroscopy showed characteristic peaks indicative bone-derived material, consistent with contents. results suggest <i>Bannykus</i> had a carnivorous diet strong chemical digestion, which likely compensated its delicate cranial structures small teeth. These imply if occurred, it took place later alvarezsaurian evolution, probably coinciding size.</p>

Язык: Английский

Процитировано

0
Convincing Evidence of Carnivorous Diet in Alvarezsaurian Dinosaur DOI Open Access
Shuo Wang, Nuo Ding, Waisum Ma

и другие.

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Дек. 10, 2024

A dietary shift from carnivory to insectivore has been proposed explain the dramatic morphological evolution of alvarezsaurians, particularly adaptation related manual digital reduction and body size miniaturization. However, based solely on shifts, this hypothesis lacked direct evidence support either or insectivore. Here, we present first convincing for derived intestinal contents Early Cretaceous Bannykus wulatensis . Our analysis revealed significantly higher levels calcium phosphorus in compared surrounding sandstone. Scanning electron microscopy identified hard tissue debris possible soft tissues by phosphatized bacteria tightly packed hollow microspheres, suggesting that were strongly pseudomorphed microbes during fossilization. Raman spectroscopy showed characteristic peaks indicative bone-derived material, consistent with appeared contents. results suggest had a carnivorous diet strong chemical digestion, which likely compensated its delicate cranial structures small teeth. These imply if occurred, it took place later alvarezsaurian evolution, probably coinciding size.

Язык: Английский

Процитировано

0