Investigating Possible Gastroliths in a Referred Specimen of Bohaiornis guoi (Aves: Enantiornithes)
- Environmental Science, GeographyFrontiers in Earth Science
Gastroliths, where preserved, can provide indirect evidence regarding diet in extinct avian and non-avian dinosaurs. Masses of gastroliths consistent with the presence of a gastric mill are preserved…
Mammal‐bearing gastric pellets potentially attributable to Troodon formosus at the Cretaceous Egg Mountain locality, Two Medicine Formation, Montana, USA
- Environmental Science, GeographyPalaeontology
Fossil gastric pellets (regurgitalites) have distinct taphonomic characteristics that facilitate inferences of behavioural ecology in deep time, despite their rarity in the fossil record. Using the…
New toothed Early Cretaceous ornithuromorph bird reveals intraclade diversity in pattern of tooth loss
- BiologyJournal of Systematic Palaeontology
The earliest record of the Ornithuromorpha, which includes crown birds, is currently known from the Early Cretaceous Jehol Biota in north-eastern China. Here we describe a new ornithuromorph bird,…
Diet of Mesozoic toothed birds (Longipterygidae) inferred from quantitative analysis of extant avian diet proxies
- Environmental Science, GeographyBMC biology
Background Birds are key indicator species in extant ecosystems, and thus we would expect extinct birds to provide insights into the nature of ancient ecosystems. However, many aspects of extinct…
A New Enantiornithine (Aves) Preserved in Mid-Cretaceous Burmese Amber Contributes to Growing Diversity of Cretaceous Plumage Patterns
- Biology, GeographyFrontiers in Earth Science
A new specimen that consists of the distal extremities of both forelimbs and hindlimbs is described, suggestive of a diversity of limb proportions in the Burmese enantiornithine fauna, similar to that observed in the Jehol avifauna.
The evolution of the modern avian digestive system: insights from paravian fossils from the Yanliao and Jehol biotas
- Biology, Environmental SciencePalaeontology
The sum of the data gleaned from the thousands of exceptionally well‐preserved fossils of paravians is interpreted with regards to the structure and evolution of the highly modified avian digestive system and feeding apparatus, suggesting intrinsic differences between closely related stem lineages implying either strong homoplasy or that diet in each lineage of non‐ornithuromorph birds was highly specialized.
Two new Early Cretaceous ornithuromorph birds provide insights into the taxonomy and divergence of Yanornithidae (Aves: Ornithothoraces)
A taxonomical reassessment of yanornithids is performed and the results show that Yanornithidae contains three genera and three species, which demonstrate a wide range of limb proportions that exceed the degree seen in other L early ornithuromorph clades.
The Hesperornithiformes: A Review of the Diversity, Distribution, and Ecology of the Earliest Diving Birds
- Environmental ScienceDiversity
The Hesperornithiformes (sometimes referred to as Hesperornithes) are the first known birds to have adapted to a fully aquatic lifestyle, appearing in the fossil record as flightless, foot-propelled…
Hummingbird-sized dinosaur from the Cretaceous period of Myanmar
- Environmental Science, BiologyNature
Oculudentavis khaungraae —a newly discovered theropod from the Cretaceous period of Myanmar—reveals a previously unknown bauplan and ecology associated with miniaturization, highlighting the potential for recovering small-bodied vertebrates from amber deposits.
Exploring the Ecomorphology of Two Cretaceous Enantiornithines With Unique Pedal Morphology
- Biology, GeographyFrontiers in Ecology and Evolution
The unusual morphology of Hukawng enantiornithines justifies erection of a new taxon, Fortipesavis prehendens gen. et sp.
SHOWING 1-10 OF 110 REFERENCES
First report of gastroliths in the Early Cretaceous basal bird Jeholornis
- Geography, Environmental Science
Reinterpretation of a previously described Jehol bird clarifies early trophic evolution in the Ornithuromorpha
- Biology, Environmental ScienceProceedings of the Royal Society B: Biological Sciences
Close inspection of STM35-3 reveals that the specimen represents a new species not closely related to hongshanornithids, distinguished by large forelimbs that exceed the length of the hindlimbs, robust and narrow coracoids, and a delicate edentulous rostrum.
New Specimens of Yanornis Indicate a Piscivorous Diet and Modern Alimentary Canal
- Environmental Science, GeographyPloS one
One specimen preserves two whole fish in the oesophagus, indicating that Early Cretaceous birds shared trophic specializations with Neornithes for the increased energetic demands of flight – namely the storing of food for later consumption when the stomach is full.
Early evolution of the biological bird: perspectives from new fossil discoveries in China
- Environmental Science, GeographyJournal of Ornithology
While no skeletal or integumentary features are recognized to define Aves, a partial reconstruction of the biology of Aves very close to its origin is identified: the presence of a crop and the loss of the right ovary.
A New Specimen of Large-Bodied Basal Enantiornithine Bohaiornis from the Early Cretaceous of China and the Inference of Feeding Ecology in Mesozoic Birds
- Biology, GeographyJournal of Paleontology
It is hypothesized that cranial morphology as well as the number and shape of the preserved stones in Bohaiornis may be most consistent with a raptorial ecology previously unknown for Enantiornithes and considered rare for Avialae.
Discovery of an ornithurine bird and its implication for Early Cretaceous avian radiation.
- Environmental Science, GeographyProceedings of the National Academy of Sciences of the United States of America
An ornithurine bird, Hongshanornis longicresta gen. et sp. nov., represented by a nearly complete and articulated skeleton in full plumage, has been recovered from the lacustrine deposits of the…
Gastroliths in Yanornis: an indication of the earliest radical diet-switching and gizzard plasticity in the lineage leading to living birds?
- Environmental ScienceNaturwissenschaften
The discovery of a new complete and articulated specimen of Yanornis martini preserves abundant in-situ gastroliths, which indicates the earliest presence of intermittent diet change observed in extant birds seasonally and in response to changes in available food sources.
Additional specimen of Microraptor provides unique evidence of dinosaurs preying on birds
- Environmental Science, GeographyProceedings of the National Academy of Sciences
A unique specimen of the small nonavian theropod Microraptor gui from the Early Cretaceous Jehol biota, China, which has the remains of an adult enantiornithine bird preserved in its abdomen, most likely not scavenged, but captured and consumed by the dinosaur.
A new piscivorous ornithuromorph from the Jehol Biota
- Biology, Environmental Science
The preservation of fish bones ventral to the dentary and in the stomach provides direct evidence that the new species was piscivorous – previously only reported in Yanornis, and as in some living birds, was capable of moving food bidirectionally through the alimentary canal.
Abdominal Contents from Two Large Early Cretaceous Compsognathids (Dinosauria: Theropoda) Demonstrate Feeding on Confuciusornithids and Dromaeosaurids
- Geography, Environmental SciencePloS one
Two skeletons of the large compsognathid Sinocalliopteryx gigas include intact abdominal contents and it is suggested it may have been an adept stealth hunter.