#allkaruen

[he-who-needs-to-be-silenced]

#weird kitty #must be a stray #stray cat #so cute #🥰 #word #weird #cat #weird cat #weird dog series #allkaruen #darwinopterid #pterosaur #avemetatarsalia #archosaurs #paleoblr #paleoart #paleontology #juvenile animals #mesozoic #jurassic period #Jurassic #Argentina #Brazil

[a-dinosaur-a-day]

Asfaltovenator vs Meraxes

Factfiles:

Asfaltovenator vialidadi

Artwork by @i-draws-dinosaurs, written by @raptorcivilization

Name meaning: Hunter of the Cañadón Asfalto Formation, thanks to the Vialidad Nacional 

Time: 179 to 178 million years ago (Toarcian stage of the Early Jurassic)

Location: Cañadón Asfalto Formation, Argentina

On the surface Asfaltovenator might look like just a generic carnosaur. Which it kinda is - being at around the base of Carnosauria. But it’s a pretty good basal carnosaur. It’s known from a single individual, but the entire front half of the body was recovered - complete head, neck, arms, and torso. Which is pretty cool. What’s even more interesting is that it displays a blend of anatomical features that had previously been considered unique to different tetanuran lineages (megalosauroids, carnosaurs, and coelurosaurs). Because of this, in the the phylogenetic analysis from its description, it dragged megalosauroids back into Carnosauria. First time that happened in a couple decades, which is neat. It even kinda looks like a retro carnosaur, in my opinion at least. At an estimated 25 feet long, while not huge, it was one of the largest predatory dinosaurs on the planet at the time. It lived alongside other early members of diverse Jurassic-Cretaceous dinosaur groups, including Eoabelisaurus, Bagualia, and Volkheimeria, as well as several mammals, a rhynchocephalian, the hallopodid crocodylomorph Almadasuchus, turtles, frogs, and the pterosaur Allkaruen.

Meraxes gigas

Artwork by @i-draws-dinosaurs, written by @zygodactylus

Name Meaning: Giant Dragon 

Time: 95 million years ago (Cenomanian stage of the Late Cretaceous) 

Location: Huincul Formation, Patagonia, Argentina 

Giganotosaurs keep having new family members added to the group, and this one, Meraxes, is actually known from a decent amount of fossil material! Woo! Raching tern meters in length and known from parts of the limb bones, the skull, ribs, and vertebrae that show Meraxes was very similar to other Carcharodontosaurs, such as Acrocanthosaurus, in terms of limb proportions. It had the shortened forelimbs similar to other large carnivorous dinosaurs, indicating that this trait was selected for in large theropods on a repeated basis. It had a huge claw on its second toe, twice as long as the fourth toe claw. Having died sometime between 39 and 53 years of age, Meraxes is also one of the longest-lived nonavian theropods known, extending its growth period through its life in order to grow to larger sizes. Living in the arid, seasonal floodplain environment of the Huincul Formation, Meraxes lived alongside a wide variety of other dinosaurs, including Argentinosaurus, Cathartesaura, Choconosaurus, Chucarosaurus, Limaysaurus, Taurovenator, Mapusaurus, Gaulicho, Aoniraptor, Skorpiovenator, Tralkasaurus, Ilokelesia, Huinculsaurus, Overoraptor, and other fragmentary taxa.

DMM Round One Masterpost

#dmm #dinosaur march madness #dmm round one #dmm rising stars #palaeoblr #dinosaurs #paleontology #bracket #march madness #polls #asfaltoveantor #meraxes

[tinydinosxm]

the Allkaruen Koi

#paleo art

[tepuitrouble]

#pterosaur ptuesday Allkaruen koi! #sciart #paleoart #illustration

  Described in 2016, A.koi  was a genus of Jurassic rhamphorhynchoid pterosaur from Argentina’s Cañadon Asfalto formation.  It is known from a partial mandible, cervical vertibrae, and most importantly a three-dimensionally preserved braincase.

  The structure of A.koi’s brain shows features of both the early rhamphorhynchoid pterosaurs (such as Dimorphodon and Rhamphorhynchus) and later, more derived pterodactyloid and wukongopterids (such as Pteranodon and Darwinopterus) indicating that it represents an evolutionary transitional phase between the groups.

sources

[1] [2] [3]

#scientific illustration #paleoart #palaeoblr #pterosaur ptuesday

[a-dinosaur-a-day]

Round Two: Asfaltovenator vs Maip

Asfaltovenator vialidadi

Artwork by @i-draws-dinosaurs, written by @raptorcivilization

Name meaning: Hunter of the Cañadón Asfalto Formation, thanks to the Vialidad Nacional 

Time: 179 to 178 million years ago (Toarcian stage of the Early Jurassic)

Location: Cañadón Asfalto Formation, Argentina

On the surface Asfaltovenator might look like just a generic carnosaur. Which it kinda is - being at around the base of Carnosauria. But it’s a pretty good basal carnosaur. It’s known from a single individual, but the entire front half of the body was recovered - complete head, neck, arms, and torso. Which is pretty cool. What’s even more interesting is that it displays a blend of anatomical features that had previously been considered unique to different tetanuran lineages (megalosauroids, carnosaurs, and coelurosaurs). Because of this, in the the phylogenetic analysis from its description, it dragged megalosauroids back into Carnosauria. First time that happened in a couple decades, which is neat. It even kinda looks like a retro carnosaur, in my opinion at least. At an estimated 25 feet long, while not huge, it was one of the largest predatory dinosaurs on the planet at the time. It lived alongside other early members of diverse Jurassic-Cretaceous dinosaur groups, including Eoabelisaurus, Bagualia, and Volkheimeria, as well as several mammals, a rhynchocephalian, the hallopodid crocodylomorph Almadasuchus, turtles, frogs, and the pterosaur Allkaruen.

Maip macrothorax

Artwork by @i-draws-dinosaurs, written by @zygodactylus

Name Meaning: Long-chested Shadow of Death 

Time: 72 to 66 million years ago (Maastrichtian stage of the Late Cretaceous) 

Location: Chorrillo Formation, Patagonia, Argentina 

Megaraptors, a group not even really understood a few decades ago, just keep having more and more interesting members added to this group - Maip, a recent addition known from many bones of the trunk and tail, help fill out more of this picture with remains not known from other Megaraptors, and als having the most complete Megaraptor skeleton known. Maip was also interesting in having a very long, thick torso, leading to its specific name. It probably reached 9 to 10 meters in length in life, making it the largest Megaraptor known (literally reaching carcharodontosaurid size), and it may indicate that megaraptors rose to high-level predator status as other top predators went extinct in the region. It had a respiratory system similar to modern birds, with unidirectional air flow, much like other Saurischian dinosaurs. Living in southernmost South America, Maip would have had to deal with a variety of harsh climates, and may have been covered in feathers in order to keep warm. In addition to mosasaurs, snakes, turtles, mammals, fish, and frogs, Maip lived with other dinosaurs such as Nullotitan, Kookne, Yatenavis, and Isasicursor. 

#dmm #dinosaur march madness #dinosaurs #birds #dmm rising stars #dmm round two #birblr #palaeoblr #paleontology #bracket #march madness #polls #asfaltovenator #maip

[a-dinosaur-a-day]

Allkaruen koi

By Joschua Knüppe, retrieved from http://www.pteros.com/, a website dedicated to education about Pterosaurs.

A reminder that we will not be able to do every pterosaur until we reach $240 in donations on our patreon, so please donate even a dollar if you can.

Name: Allkaruen koi

Name Meaning: Ancient Brain

First Described: 2016

Described By: Codorniú et al. 

Classification: Avemetatarsalia, Ornithodira, Pterosauromorpha, Pterosauria, Macronychoptera, Novialoidea, Breviquartossa, Pterodactylomorpha

Allkaruen is an early derived Pterodactylomorph from the Cañadon Asfalto Formation in Argentina, living about 182 to 168 million years ago, from the Early to Middle Jurassic, sometime between the Toarcian to Bajocian ages. It shows an intermediate evolutionary stage between early derived pterosaurs, such as the Rhamphorhynchoids, and the later derived Pterodactyloids like Pteranodon. It is known from some portions of the skeleton, but more than anything it is known from a very well preserved braincase. It shows a mixture of traits found in more derived and less derived pterosaur brains, indicating that the brains of pterosaurs evolved with changes taking place in some parts of the brain, while others remaining the same (a phenomenon known as mosaic evolution). Even though it wasn’t preserved, it probably had a long tail. 

Sources:

http://www.pteros.com/pterosaurs/allkaruen.html

https://en.wikipedia.org/wiki/Allkaruen

Shout out goes to @freshcoffeeanddreams!

#allkaruen #allkaruen koi #pterosaur #pterodactylomorph #pterosaur ptuesday #palaeoblr #freshcoffeeanddreams #paleontology #prehistory #prehistoric life #biology #science #nature #factfile