#jehol biota

[a-dinosaur-a-day]

Concept: a reality show about the dino-birds of the Jiufotang formation

"Who will still have descendants in 110,000,000 years?"

or something idk

[knuppitalism-with-ue]

Hey I need some help, can you give me a list of carnivore dinosaurs that lived in forests??

Sorry, I'm not a list maker for hire ;)

The problem with your question is that forests usually don't preserve fossils. Most dinosaurs have been found in floodplain sediments, lakes, swamps, dunes or even marine sediments. So if they lived in forests they are usually found adjacent to them, not in them. That means we often times can't be sure if they really lived where they were buried.

In some cases, like the Jehol Biota, we know that the animals also lived there because here the animals are preserved in lakes and they were preserved very quickly in volcanic ash + the preserved plant fossils speak for a rich forest environment around the lakes.

What you have to do is look into the geology and paleobotany of the animals you have in mind. The formation articles on Wikipedia usually have a paleoecology/paleoenvironment section.

[greenfrog04]

A new toothless pterosaur from the Early Cretaceous Jehol Biota with comments on the Chaoyangopteridae

Published 21st December 2023

A new species of azhdarchoid Chaoyangopterid is described based on 2 specimens from the Jiufotang Formation in China, named Meilifeilong youhao. This new species represents the most complete and well-preserved chaoyangopterid ever, including rarley preserved ear material and a nearly complete skull.

Photo and line drawing of Meilifeilong youhao holotype

Second known specimen of Meilifeilong youhao

Source:

[covenawhite66]

Paleontologists analyzed five fossils of an early Cretaceous bird, Sapeornis chaoyangensis, in order to study how the environment they were buried in changed the preservation of their soft tissue.

The site of Jehol Biota in China is famous for stunning fossils which preserve soft tissue—skin, organs, feathers, and fur.

The most likely explanation for how well the fossil is preserved is that the bird was swept away by a rainstorm and rapidly buried at the bottom of a lake, where a restricted burial environment ensured it wasn't disturbed. It is unlikely that it was from volcanic activity Since fossils in pyroclastic flows don't preserve soft tisdue

Discovery of five specimens of early bird Sapeornis chaoyangensis

The Jehol Biota, one of the most important Mesozoic fossil Lagerstätten, comprises extraordinary taxonomic diversity of micro- and megaplants, invertebrates, and vertebrates; moreover, it provides the most informative source for understanding Mesozoic ecology.

Fossil soft tissues contain important and irreplaceable information on life evolution, and on the comprehensive understanding of the nature of Mesozoic ecosystems. Compared to other fossil soft tissues, Jehol Biota feathers are more commonly reported. However, taphonomic analysis of these feathers is lacking. Here,

[gaetaniu]

Rare piume fossili rivelano i segreti dell'hotspot paleontologico del Cretaceo

Uno dei tanti sorprendenti esemplari del Jehol Biota. Il sito di Jehol Biota, in Cina, è famoso per gli straordinari fossili che conservano tessuti molli, organi, piume e pellicce. Questi fossili offrono una rara visione dell’evoluzione di caratteristiche come il volo, ma necessitano di un’attenta interpretazione per comprendere l’aspetto e il comportamento dei tessuti molli in vita e come la…

[newswireml]

Rare fossilized feathers reveal secrets of paleontology hotspot during Cretaceous period#Rare #fossilized #feathers #reveal #secrets #paleontology #hotspot #Cretaceous #period

One of the many amazing specimins from Jehol Biota. Credit: M.violante, CC BY-SA 3.0 , via Wikimedia Commons The site of Jehol Biota in China is famous for stunning fossils which preserve soft tissue—skin, organs, feathers, and fur. These fossils offer rare insights into the evolution of characteristics like flight, but they need careful interpretation to understand what the soft tissue looked…

[metodogolo]

Ave del Jurásico Temprano con cráneo de dinosaurio y cuerpo de pájaro revela la importancia del mosaicaje evolutivo

Cratonavis zhui es una nueva especie de ave pygostyliana del Jurásico Temprano Jehol Biota de China, que tiene una combinación única de un cráneo de dinosaurio con un esqueleto post-craneal avialano, lo que revela el papel clave del mosaicaje evolutivo en la diversificación temprana de las aves.

Cratonavis zhui vivió en lo que hoy es China durante el Jurásico Temprano, hace aproximadamente 120 millones de años. En el árbol evolutivo de las aves, se sitúa entre los miembros del clado de aves Ornithothoraces y el más parecido a reptiles Archaeopteryx.

Los investigadores estudiaron el cráneo y el esqueleto post-craneal de Cratonavis zhui usando la tomografía computarizada de alta resolución. Sus resultados demostraron que el cráneo es morfológicamente casi idéntico al de dinosaurios como el Tyrannosaurus rex. Los hallazgos fueron publicados en la revista Nature Ecology & Evolution.

La novedad de este hallazgo es que Cratonavis zhui es una nueva especie de ave pygostyliana del Jurásico Temprano que tiene una combinación única de un cráneo de dinosaurio con un esqueleto post-craneal avialano. Esto sugiere que en la diversificación temprana de las aves, el mosaicaje evolutivo (es decir, la combinación de características de diferentes grupos evolutivos) desempeñó un papel clave. Además, el hecho de que Cratonavis zhui se sitúe entre Ornithothoraces y Archaeopteryx en el árbol evolutivo de las aves proporciona más información sobre la evolución de las aves en el Jurásico Temprano.

Referencia:

Z. Li et al. Decoupling the skull and skeleton in a Cretaceous bird with unique appendicular morphologies. Nat Ecol Evol, published online January 2, 2023; doi: 10.1038/s41559-022-01921-w

[giornalepop]

DAURLONG, TROVATO L'INTESTINO DI UN DINOSAURO

DAURLONG, TROVATO L’INTESTINO DI UN DINOSAURO

L’eccezionale preservazione di Daurlong e, a sinistra, la regione intestinale Da più di 25 anni, l’Eldorado mondiale dei dinosauri ha un nome: Biota Jehol. Questo termine indica una serie di località fossilifere, risalenti al Cretacico Inferiore (in particolare, l’intervallo Barremiano-Aptiano, ovvero circa 125-115 milioni di anni fa), localizzate nel nord-est della Cina, in particolare nella…

[albertonykus]

Ever wanted a song about the Jehol Biota? Well, there's one now! Topic suggested, fact-checked, and featuring a drawing by me. Between my pedantic nitpicking and Amazon's incompetence, John had to put up with a lot to make this one. You, too, have the chance to get a song written about a science subject of your choice, just leave a suggestion with Ensonglopedia!

[netmassimo]

An article published in the journal "Current Biology" reports the study of a specimen of a small feathered dinosaur belonging to the species Microraptor zhaoianus which is not only almost complete but still contained in its stomach the remains of a lizard belonging to a species that was still unknown and was named Indrasaurus wangi. A team of paleontologists led by Professor Jingmai O'Connor of the Chinese Academy of Sciences examined the remains of the two animals that lived about 120 million years ago in today's China and, also based on three previous discoveries of Microraptor with a preserved prey in their stomach, confirmed the theory that this type of dinosaur was an opportunistic predator.

[a-dinosaur-a-day]

critters of the Yixian

critters of the Jiufotang

[new-dinosaurs]

Daurlong wangi Wang et al., 2022 (new genus and species)

(Type specimen of Daurlong wangi [b: close-up of skull; c: close-up of eye socket; d: close-up of preserved feathers; e: frog skeleton preserved nearby; scale bars = 20 mm for b and 10 mm for c], from Wang et al., 2022)

Meaning of name: Daurlong = Daur dragon [in Chinese]; wangi = for Wang Junyou [director of the Inner Mongolia Museum of Natural History]

Age: Early Cretaceous (Aptian), about 121 million years ago

Where found: Longjiang Formation, Inner Mongolia, China

How much is known: Nearly complete skeleton of one individual with preserved feathers.

Notes: Daurlong was a dromaeosaurid theropod, making it a fairly close relative to Velociraptor and Deinonychus. It was especially similar to Tianyuraptor and Zhenyuanlong of the Jehol Biota (also from the Early Cretaceous of China). Like Tianyuraptor and Zhenyuanlong, it had relatively short forelimbs for its size, and was larger than most other Early Cretaceous dromaeosaurids that have been found in China, being about 1.5 m long in total length.

The type specimen of Daurlong not only preserves an exceptionally complete skeleton with feather remains, but also a dark mass in its abdominal cavity. In terms of shape and anatomical position, this mass resembles the preserved intestines of Scipionyx, a theropod known from a well-preserved juvenile specimen from the Early Cretaceous of Italy, and may therefore also represent preserved intestinal remnants in Daurlong.

Reference: Wang, X., A. Cau, B. Guo, F. Ma, G. Qing, and Y. Liu. 2022. Intestinal preservation in a birdlike dinosaur supports conservatism in digestive canal evolution among theropods. Scientific Reports 12: 19965. doi: 10.1038/s41598-022-24602-x

[amnhnyc]

🚨New research alert! A recent study led by Museum Curator Jin Meng has revealed two new burrowing mammal ancestors that were part of the Jehol Biota in northeastern China, which was home to a great diversity of life some 145 to 100 million years ago, from dinosaurs to insects to plants. The two new species of mammal-like, burrowing animals—members of a larger group called mammaliaforms from which mammals themselves emerged—are the first “scratch-diggers” discovered in this ancient ecosystem. 👋Let’s meet the new species: One, measuring about 1 foot (0.3 meters) in length, is a mammal-like reptile called a tritylodontid and is the first of its kind to be identified in this biota. It was given the name Fossiomanus sinensis. The other, named Jueconodon cheni, is a eutriconodontan, a distant cousin of modern placental mammals and marsupials. It’s about 7 inches (17 centimeters) long. Image: J. Meng/© AMNH; Fossiomanus sinensis on left, Jueconodon cheni on right (at American Museum of Natural History) https://www.instagram.com/p/CNisNm9Ahnm/?igshid=qm1bjkl1toms

[captain-lovelace]

A drawing of Nie Huaisang I did, based on an idea by @plotdesigner. His home in Hebei is somewhat close to the Jehol Biota, an Early Cretaceous terrestrial Lagerstatten (area of exceptional fossil preservation), which has yielded a number of beautiful fossils of feathered dinosaurs and early birds. Fossil birds especially seem to fit well with his themes, so we took that idea and ran with it. I may not have finished The Untamed yet but I do still love him and also I have been extensively spoiled for it sO,

(Please click for better quality! I didn’t draw all those sleeve details for nothing!)

[hummussexual]

Excerpt:

Vinther walks me over to his prized possession, and talks me though its backstory.

It's the Early Cretaceous in the Jehol Biota – an ancient ecosystem in northeastern China. Let's say it's a beautiful sunny day in this temperate land, and the little psittacosaurus decides to leave her densely forested home to go for a drink in one of the area's many lakes. She's around three feet (91cm) long from head to tail – reminiscent of an unusually stocky Labrador – and nearly a full adult, but she's still inexperienced.

The psittacosaurus potters over to the water's edge on two feet – she stopped walking on all fours as she got older – but then tragedy strikes. Just as she's leaning down for a sip with her parrot-like beak, she slips, falls in and drowns. As she plunges to the bottom of the lake, she ends up inelegantly splayed on her back  – accidentally preserving her genitals for future apes to wonder over. 

[gaetaniu]

Un uccello del primo Cretaceo aveva un cranio simile a quello di un dinosauro e un corpo simile a quello di un uccello

Un uccello del primo Cretaceo aveva un cranio simile a quello di un dinosauro e un corpo simile a quello di un uccello

Cratonavis zhui. Cratonavis zhui, una nuova specie di uccello pigostiliano proveniente dal biota di Jehol del primo Cretaceo cinese, presenta una combinazione unica di cranio di dinosauro e scheletro postcraniale di aviaria, rivelando il ruolo chiave del mosaicismo evolutivo nella diversificazione degli uccelli primitivi. Cratonavis zhui visse nell’attuale Cina durante il primo Cretaceo, circa…