#siamraptor

[mesozoicmarket]

A dinosaur tooth of an undescribed carcharodontosaurian, possibly a cf. Siamraptor suwati from the Grès supérieurs Formation in the Savannakhet Province of Laos. This species is currently only known from the equivalent Khok Kruat Formation in Thailand.

[obscurefossils]

Siamraptor

Siamraptor was a genus of carcharodontosaurian dinosaur from the Early Cretaceous period. Its type species is S. suwati. The holotype was found in the Khok Kruat Formation in northeastern Thailand. Siamraptor is the first and currently only definite carcharodontosaurian known from Southeast Asia.

"Siam" is derived from the original name of Thailand, "raptor" is Latin for robber, and the specific name suwati refers to Suwat Liptapanlop, a supporter of the Northeastern Research Institute of Petrified Wood and Mineral Resources.

Its autapomorphies include a jugal with a straight ventral margin and a deep anterior process below the orbit, a surangular with a concavity and four posterior foramina, a groove along the suture between the surangular and prearticular, an articular with a formen at the suture with the prearticular, a cervical vertebra with an additional foramen that is excavating the parapophysis, and the presence of a pair of foramina at the base of the neural spine on the cervical and posterior dorsal vertebrae. Another possible autapomorphy specific to the genus may be a deep concavity excavating the posterior end of the lateral shelf.

Siamraptor is known from its holotype, consisting of a posterior right mandible including the surangular, prearticular, and articular; as well as referred material from three other individuals including three right premaxillae, a right and left maxillae, a left jugal, two posterior parts of the left mandible, three cervical vertebrae, a caudal vertebra, a manual ungual, a right ischium, a section of the left tibia, and a left pedal phalanx. Siamraptor was recovered as a definite carcharodontosaurian, though its relationships within the clade are uncertain. It may have been a derived member of Allosauria outside of Allosauridae or a basal member of Carcharosauria in a polytomy with Eocarcharia, Concavenator, and Neovenator.

Original paper: Original description paper

Wikipedia article: here

[southeastasianists]

Siamraptor suwati joins the ranks of predatory dinosaurs known to science — and it’s the first of its lineage from Southeast Asia, giving its discovery greater significance.

When it comes to bitey dinos, most people think of T. rex and velociraptors (thanks, Jurassic Park…). But if toothy terrors are your thing, you should really get to know the carcharodontosaurs.

The lineage’s name — which translates as “shark-toothed lizard” — is a clue to the dinosaurs’ trademark feature. But carcharodontosaurs were also a super successful bunch of meat-feasting beasts found on most of the continents, millions of years before T. rex or velociraptors showed up.

Measuring Up

The two species belonging to the genus Carcharodontosaurus, which lived in Africa about 100 million years ago, are arguably the most famous members of the shark-toothed tribe. Both animals may have reached lengths of nearly 50 feet.

Some researchers believe another carcharodontosaurid, Argentina’s Giganotosaurus, was even bigger: It may have been the largest land-based predatory dinosaur ever, beating T. rex by a nose (or a toothy snout).

(By the way, that’s not a typo. You may have heard of Gigantosaurus, a name given in the 19th century to large plant-eating dinosaur fossils from England, but South America’s Giganotosaurus was definitely no plant-eater.)

Even the smallest known carcharodontosaurs had estimated lengths of 20 feet or more.

Worldwide Distribution

And sure, it’s fun to imagine a world where carnivorous dinosaurs bigger than your mom’s Suburban were a thing, but what made the carcharodontosaurs particularly impressive was their distribution. They’ve been found in the Americas, Africa, Europe and parts of Asia.

One place they hadn’t been found, until now, was Southeast Asia (at least, conclusively — a single upper jaw fragment from Thailand was assigned to Carcharodontosauridae, genus undetermined, in 2012).

Which brings us to Siamraptor. Paleontologists found partial fossils of at least four individuals in northeastern Thailand, deposited in sediment that’s about 120 million years old. Although the fossils are somewhat fragmentary, there was enough material to determine they belonged to a carcharodontosaur from the middle of the Early Cretaceous.

The name of the new genus, Siamraptor, is a nod to its Thai homeland where, in life, it probably reached lengths of  about 26 feet. That’s not the biggest of the carcharodontosaurs by a long shot, but certainly nothing you’d want to come face to face with.

It’s not size that makes Siamraptor a big deal, in fact. It’s the animal’s geologic age and location.

After analyzing the fossils, the paleontologists concluded that it’s a basal member of the lineage — one of the earliest carcharodontosaurs to go its own way, evolutionarily speaking. And it’s of the same age as other carcharodontosaurs in Europe and Africa.

All that tells us this highly successful lineage of meat lovers had a global distribution earlier than expected, making them even more successful than we thought.

Siamraptor makes its debut today in the open-access journal PLOS ONE.

[speedygal]

WASHINGTON, Oct 9 (Reuters) - Fossils of a large carnivorous dinosaur that was a top predator about 115 million years ago have been unearthed in Thailand -- a brute that was among the early members of an impressive group of flesh-ripping dinosaurs known for their shark-like teeth.

Scientists on Wednesday said the dinosaur, named Siamraptor suwati, was more than 26-foot-long (9 meters) long and weighed at least 3.5 tons. Siamraptor, the largest carnivorous dinosaur ever discovered in Thailand, lived during the Cretaceous Period in an environment centered on a meandering river system and preyed on plant-eating dinosaurs, the researchers said.

Paleontologist Duangsuda Chokchaloemwong of Nakhon Ratchasima Rajabhat University and Khorat Fossil Museum in Thailand said partial skeletons of four Siamraptor individuals were discovered in Korat, Thailand. The fossils include parts of the skull, backbone, limbs, hips and teeth.

[toutelathailande]

Le Siamraptor : une nouvelle espèce de dinosaure découverte en Thaïlande

Le Siamraptor Suwati est une nouvelle espèce de dinosaure qui vient d'être découverte par une équipe de paléonthologues thaïlandais et japonais en Thaïlande.

Présentation du Siamraptor Suwati

Surnommé Siamraptor Suwati, le dinosaure a vécu il y a environ 120 millions d'années (période du Crétacé). Le nom générique est dérivé de "Siam", l'ancien nom de la Thaïlande et du mot latin raptor (rapace). Le nom spécifique rend hommage à Suwat Liptapanlop, qui a soutenu l’Institut de recherche du Nord-Est sur les ressources en bois et en bois pétrifié. L'ancienne créature était membre de Carcharodontosauria, un groupe de grands dinosaures carnivores des périodes du Jurassique et du Crétacé. En fait, Siamraptor suwati est le plus ancien dinosaure carcharodontosaurien connu et le premier du genre en Asie du Sud-Est.

Description du Siamraptor

Reconstitution du Crâne du Siamraptor - credit : Chokchaloemwong et al La longueur du corps du Siamraptor a été estimée à huit mètres. Selon les chercheurs, le Siamraptor possédait des "dents de requin" et était "probablement une bête féroce, rapide et dynamique", a déclaré le paléontologue britannique Steve Brusatte à National Geographic.

Siamraptor, un dinosaure découvert en Isan

Nakhon Ratchasima Les restes fossilisés d'au moins quatre individus de Siamraptor suwati - crâne, épine dorsale, membres et hanches - ont été récupérés dans la formation de Khok Kruat dans la province de Nakhon Ratchasima, dans le nord-est de la Thaïlande, l'Isan. Les fossiles ont été analysés par Mme Duangsuda Chokchaloemwong de l'Université Nakhon Ratchasima Rajabhat et ses collègues de Thaïlande et du Japon. "Les analyses phylogénétiques ont révélé que le Siamraptor suwati est une espèce basale de Carcharodontosauria, ce qui implique une nouvelle vision du contexte paléobiogéographique de ce groupe ", ont déclaré les paléontologues. "Siamraptor suwati est le théropode carcharodontosaure le mieux conservé d'Asie du Sud-Est, et il jette un nouvel éclairage sur l'histoire de l'évolution précoce de la carcharodontosaure." Source : sci-news.com, Wikipedia Read the full article

[freehealthteacher]

Meet Siamraptor suwati, a new species of giant predatory dinosaur from Thailand

Meet Siamraptor suwati, a new species of giant predatory dinosaur from Thailand

[ad_1]

Siamraptor skull reconstruction. Credit: Chokchaloemwong et al., 2019

Fossils discovered in Thailand represent a new genus and species of predatory dinosaur, according to a study released October 9, 2019 in the open-access journal PLOS ONEby Duangsuda Chokchaloemwong of Nakhon Ratchasima Rajabhat University, Thailand and colleagues.

[netmassimo]

An article published in the journal "PLOS ONE" reports the identification of a new species of dinosaur that lived in today's Thailand around 120 million years ago, in the Cretaceous period, which was named Siamraptor suwati. It belongs to the group of carcharodontosaurian, in turn part of the larger group of allosaurs, carnivorous dinosaurs that were super-predators in their ecosystems. This new species, like its closest relatives, had teeth similar to those of sharks and can provide information on the global spread of these dinosaurs.

[labnotes19]

Newly Discovered Dinosaur Was a Giant 'Shark Tooth' Carnivore

Siamraptor suwati, discovered in Thailand, sliced flesh with razor-sharp teeth rather than crushing the bones of its prey from Science | Smithsonian https://ift.tt/2OA6F4Q via IFTTT

[soclaimon]

พบซากไดโนเสาร์ในไทยสมบูรณ์แบบที่สุดในอาเซียน

ศาสตร์เกษตรดินปุ๋ย : ขอบคุณแหล่งข้อมูล : หนังสือพิมพ์โพสต์ทูเดย์

https://www.posttoday.com/world/603531

วันที่ 14 ต.ค. 2562 เวลา 16:15 น.

นักวิจัยของไทยนำโดย ดร. ดวงสุดา โชคเฉลิมวงศ์ แห่งมหาวิทยาลัยราชภัฏนครราชสีมา พร้อมด้วยคณะ เปิดเผยรายงานการค้นพบชิ้นส่วนของไดโนเสาร์พันธุ์ Siamraptor suwati ซึ่งเป็นซากกลุ่มคาร์คาร์โรดอนโทซอร์ เทโรพอด (carcharodontosaurian theropod)…

[mesozoicmarket]

A dinosaur tooth of an indeterminate carcharodontosaurid from the Grès supérieurs Formation in the Savannakhet Province of Laos. It could possibly belong to cf. Siamraptor suwati, but the size and morphology seems to indicate a more derived species more similar to Carcharodontosaurus. Crown height of this tooth is around 3.2 inches (81mm) with a CBL of 33mm and CBW of 15mm. Midline mesial and distal serration density around 11.5/5mm, with the mesial carinae extending to the base. So a DSDI of 1.0, CHR of 2.45, and a CBR of 0.45.

[gaetaniu]

E’ stato Scoperto un nuovo enorme dinosauro predatore

E’ stato Scoperto un nuovo enorme dinosauro predatore

Risalenti a più di 113 milioni di anni fa, i fossili appena scoperti, dicono i paleontologi, appartengono a “uno dei più importanti dinosauri thailandesi mai trovati”.

Gli scavi in Thailandia hanno rivelato Siamraptor suwati, un nuovo tipo di dinosauro predatore. La creatura apparteneva ai carcharodontosaurs, un gruppo noto per i suoi denti seghettati, simili a coltelli. 

Oggi, la terra vicino a…

[electrasea]

Siamraptor suwati: First Bitey Dino of Its Kind in Southeast Asia

[superedgarguerrame]

Siamraptor vs Gojirasaurus Dino Battle 2020

[gouracademy]

Topmost current affairs quiz of 11 October 2019

Topmost current affairs quiz of 11 October 2019

Topmost current affairs quiz of 11 October 2019: Current Affairs questions & Answers with explanation quiz to boost your General Awareness. Practice with our prestigious Current Affairs Quiz of 11 October, 2019 questions which covers all important events across India as well as World. Create use of all vital Current Affairs Quiz of 11 October, 2019 questions with answers updated here, at free of…

[expedientesinico]

Tailândia. Encontrados fósseis de dinossauro com dentes de tubarão

Tailândia. Encontrados fósseis de dinossauro com dentes de tubarão

Fósseis de um grande dinossauro carnívoro que terá sido um imponente predador há cerca de 115 milhões de anos foram desenterrados na Tailândia. A descoberta ajuda a entender um animal que está entre os primeiros membros de um grupo de dinossauros conhecidos por ter os dentes similares aos dos tubarões, usados para rasgar carne.

Paleontólogos afirmaram esta quarta-feira que o dinossauro,…