New Bird/Dinosaur intermediate species found

[shunyadragon]

Ne bird like dinosaur found in Spain contributing to the diversity of species found that relate to the evolution of birds.

Source: http://www.sci-news.com/paleontology/tamarro-insperatus-09426.html

New Bird-Like Dinosaur Identified in Spain

Mar 8, 2021 by Enrico de Lazaro


A new genus and species of troodontid dinosaur that lived 66 million years ago at the very end of the Cretaceous period has been identified from an isolated bone found in Catalonia, Spain.

Life reconstruction of Tamarro insperatusTamarro insperatus lived in what is known as the Ibero-Armorican island during the latest Maastrichtian age of the Cretaceous period, about 200,000 years before the end-Cretaceous mass extinction.

“During the latest Cretaceous (77-66 million years ago) in the run-up to the end-Cretaceous mass extinction, Europe was a series of islands populated by diverse and distinctive communities of dinosaurs and other vertebrates,” said Tamarro insperatus was a type of troodontid (Troodontidae), a group of bird-like theropod dinosaurs that includes kiwi-size (i.e. 0.8 kg for Mei long) to rhea-size species (i.e. 47 kg for Troodon formosus).

“The presence of troodontids in Europe has been debated for a long time, mainly because its record was entirely based on isolated teeth, until now,” the paleontologists said.

“The oldest troodontid evidence in Europe dates back to the Early Cenomanian age (100-94 million years ago) and is based on the discovery of one isolated tooth in western France.”

“The discovery of Tamarro insperatus in the latest Maastrichtian deposits from southern Pyrenees represents the first unequivocal bone evidence of this group of small-sized non-avian theropods in Europe, and confirms the occurrence of troodontids in the theropod faunal assemblage of that continent.”

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[shunyadragon]

Another interesting intermediate species with characteristics of birds and bird-like dinosaurs.

Source: http://www.sci-news.com/paleontology/kaririavis-mater-10297.html

Fossil of 115-Million-Year-Old Bird Found in Brazil

Nov 23, 2021 by Sergio Prostak

Kaririavis mater lived in what is now Brazil some 115 million years ago (Early Cretaceous epoch).

“Kaririavis mater lived during the Cretaceous period, when the supercontinent Gondwana — which included the South America, Africa, Australia, Antarctica and India — was splitting,” said Dr. Ismar de Souza Carvalho, a paleontologist at the Universidade Federal do Rio de Janeiro and the Universidade de Coimbra, and colleagues.

The new species is a member of Ornithuromorpha, a large group of birds that contains all extinct and living species but not Mesozoic enantiornithes.

“It had both primitive and modern morphological characteristics, making its behavior and ecological niche still mysterious,” the paleontologists said.

“It had coarse feet, very stout toe phalanges, and a claw on the second toe, very curved and proportionately large for its size, unlike those found in most ornithuromorphs, which had slender feet and slender toes.”

The fossilized remains of Kaririavis mater
The 115-million-year-old fossilized foot of Kaririavis mater. Image credit: Carvalho et al., doi: 10.1080/02724634.2021.1988623.

According to the scientists, Kaririavis materKaririavis mater is described in a paper published online in the Journal of Vertebrate Paleontology.

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[rogue06]

Picture of the fossil
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