Torvosaurus TANneri. Pencils (2017) & digital (2023).

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Trick or treat!! :3

Afrovenator!

Species: Thanatotitan Clade: Megalosauridae Diet: Carnivorous Size: 40-45 ft Habitat: Desert Canyons and Oasis Forests Threat Level: 5/5 (Highly Lethal) Group Orientation: Solitary Fun Facts: Thanatotitan is the largest predatory dinosaur in Trithanas, and are commonly referred to as "death titans" by the arkians who live in fear of this great predator.

They were once great hunters of the northern jungles, but now roam further south in the Kimmeran desert. A landscape that offered so few prey meant that Thanatotitan required huge territories to hunt in. However, they are not afraid to explore new environments in search of prey, as they are commonly known to venture into the jungles from time to time.

Although it does not take much work to capture smaller prey, Thanatotitan prefers to use the element of surprise when it comes to hunting larger prey, using their teeth and a bone crushing bite to bring them down. They have a very high predator drive that helps them survive their environment, and have commonly attacked an entire arkian village if they have little other options available to them.

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An Afrovenator stands in the rain, blood dripping from wounds that she sustained during a fight with another individual of her species.

Another old, traditional piece I did.

One of the greatest joys and honors for a paleoartist is to illustrate a new species for the press release. You are the first person to bring this animal back to life outside the minds of the researchers. In this case it was Wihenvenator, a large megalosaur from the Middle Jurassic of Germany. Formerly known as the "Monster of Minden".

I show it here in the environment it was found in, with evidence of lots of dead wood, big ammonites and marine crocodylomorphs all found near by.

A dinosaur tooth of an indeterminate theropod, likely a megalosaurid from the Isalo III Formation in Ambondromamy, Madagascar. The morphology is comparable to Middle Jurassic megalosaurs from similar contemporary deposits such as Afrovenator.

Happy 200th birthday Megalosaurus! Megalosaurus is an extinct genus of theropod dinosaur which lived throughout what is now Europe during the middle Jurassic period some 174 to 163 mya. Although it now only exists in drawings what is thought to be the first fragment of Megalosaurus consisting of a partial femur was discovered in‭ ‬1676 from a limestone quarry in Oxfordshire by professor Robert Plot,‭ ‬who due to the unprecedented nature of the find,‭ ‬declared it to belong to a biblical giant. In‭ ‬1763‭ ‬the bone was given the name‭ '‬Scrotum humanum‭' ‬by Richard Brookes,‭ ‬due to the rather crass yet accurate appearance of the end of the bone to a human scrotum.‭ ‬This name/description was never formerly accepted by any scientific body, but did prompt Rev.‭ ‬William Buckland to begin amassing various other remains from that same Oxfordshire quarry including a piece of a right lower jaw, a thigh bone, ribs, some pelvises, a foot bone, and several vertebrae. After years of study Buckland realized that these specimens all belonged to the same species of giant reptile which he named Megalosaurus meaning great lizard on February 20th 1824. Megalosaurus was 1 of 3 genera which Richard Owen used to found the Clade Dinosaur, marking Megalosaurus as the first non avian dinosaur to be formally described. Over the following centuries over 50 species would be classified as Megalosaurus however nearly all have been determined to belong to other taxa, leaving only the original Megalosaurus bucklandi as valid. Reaching around 20ft in length and 1,500lbs in weight megalosaurus was amongst mid-Jurassic Europe’s largest predators. It had a long tail, strong stout legs, a robust body, short yet muscular arms, and large head, equipped with long curved teeth. In life Megalosaurus would have inhabited tropical forests, wetlands, and coastlines feeding upon fish, invertebrates, amphibians, aquatic reptiles, and other dinosaurs in the island chain that at the time constituted Europe.

Art used belongs to the following creators

Megalosaurus: Julius T. Csotonyi

Megalosaurus through the ages: Nix Draws Stuff

Megalosaurs 200th Anniversary: NazRigar

A Hundred Some New ATOM Kaiju Pt. 2

We're continuing our showcase of ATOM kaiju who've been lingering in my "to ink and color" pile for years, and yep, it's more retrosaurs. Listen, I have to draw big dinosaur monsters frequently to make life worth living, ok? We'll get to some non-retrosaurs in... part 5, probably.

The last batch had a Crystal Palace Megalosaur-inspired kaiju in it, so we'll start this one with one inspired by the Crystal Palace Iguanodon.

Next, some horned goliaths. The first is inspired by a very old styracosaurus toy I found that really emphasized the "lizard" approach of retro dinosaur designs, looking like a bearded dragon with an elaborate crest more than an actual styracosaur. Our second is loosely inspired by Armadon from Primal Rage and Triceramon from Digimon, being my stab at what a bipedal ceratopsian monster would look like. The remaining three are me just trying to have fun with ceratopsians the way I do with theropods.

Stegronox was a fusion of stegosaur and ankylosaur traits in part to open up slots for more non-retrosaur kaiju in my cast of "core 50" kaiju for ATOM Volumes 1 and 2, so when working outside of those 50 I decided to do two retrosaur kaiju who focus on those two indvidually. The akylosaur's name is Ankylus, which is me being cheeky since that's basically what Anguirus's name would be if you translated it differently - they're both just "ankylosaurus" with a few less syllables. Then, for symmetry I suppose, I did an upright bipedal armored goliath to match the bipedal horned goliath, because "What if a four-legged creature stood on two legs" is a pretty easy way to make a monster feel distinct.

Like Stegronox, Pachydon was a combination of two different dinosaurs into one retrosaur to conserve slots in the core 50, and so I felt compelled to do two bonus retrosaur kaiju who took those two components and game them their proper due. We've got a helmeted goliath who takes the battering ram head reputation of pachycephalosaurs to a ludicous extreme, and a duckbill that particularly takes after Miasaura, which has always been my favorite hadrosaur.

We'll close out this batch with some long-necked goliaths. The first, Camarabrak, is meant to be an equal to the other retrosaur kaiju, rather than an "immense even by kaiju standards" one like Bronton. Being bigger than big is, in my eyes, part of what makes Sauropods stand out in pop culture depictions of dinosaurs, which is why I made Bronton so tremendous compared to the others, but now that there's room for more sauropod monsters, we can have one that's in the same weight class as Tyrantis and pals.

The other long-necked goliath is Brontoceratops, which was inspired by a very early reconstruction of Triceratops (I think it may have even been by my ancestor, Edward Drinker Cope, but I can't find it anymore so who knows) that gave it a weirdly long neck. In ATOM canon, Brontoceratops's species does a sort of cuckoo-bird thing, putting their eggs in the nests of horned goliaths and letting them raise it. It'd feature in a story where Tricerak tries to find more of its kind and ends up adopting the baby Brontoceratops and raising it despite it not actually being a member of his kind.

that paper released earlier is insane you cannot just reveal that a bunch of compsognathids are just baby megalosaurs

It Came From The Wastebasket #17: Getting Ornithomimus In Order

The ostrich-like "bird-mimic" dinosaur Ornithomimus was named in 1890, based on some hand and foot bones from Late Cretaceous-aged fossil beds in Colorado, USA.

The first ornithomimid known to science, it was initially thought to be a ornithopod, but then a few years later more fossil material revealed it was actually a theropod – and then it spent some time classified as a "megalosaur" before ornithomimids were finally recognized as being coelurosaurs in the early 20th century.

And for nearly a century after its discovery it was treated as a wastebasket taxon for any similar-looking fossil material from North America and Asia, with around 17 different species named within the genus. One of these was split off into Struthiomimus in 1917, but it wasn't until much later that the rest began to get sorted out.

A review of known Ornithomimus fossils in the early 1970s renamed a couple more species into the new genera Archaeornithomimus and Dromiceiomimus, and dismissed most of the remaining species as dubious or invalid. Just two valid species now remained: the original Ornithomimus velox from Colorado, and Ornithomimus edmontonicus from Alberta, Canada.

Ornithomimus edmontonicus

Since then opinions have gone back and forth about some of the other Ornithomimus species. For a while Dromiceiomimus was merged back into Ornithomimus, but more recently it's been found to have distinct limb proportions and was probably actually a separate genus after all. Another species that's usually considered to be part of Struthiomimus is also sometimes instead classified as an Ornithomimus instead.

Really all of the North American ornithomimids are in need of a modern taxonomic revision – especially since Ornithomimus edmontonicus shows enough anatomical variation that it might actually represent a species complex of multiple very similar forms, which might get split apart in the future if anyone can figure out how to reliably distinguish them.

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Nix Illustration | Tumblr | Twitter | Patreon

Spee No Green. Pencils & markers, 2023.

References: Fabio Manucci

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Is there a known reason or possible explanation/s for why the Carnotaurs and other abelisaurs evolved even shorter arms than T-Rex's?

So, the muscles in the neck area, as a rule, get really buff when theropods become large predators - it happened in Abelisaurs, it happened in Allosauroids, it happened in Megalosaurs, it happened in Tyrannosaurs. This is because, as the animal gets bigger, it tends to interact with prey and the environment more with its mouth and jaws than with its arms, because the mouth and jaws are more powerful and efficient. The musculature in the neck region directly conflicts with musculature in the upper arm for space, as they are next to each other. As such, as the muscles in the neck grow, the muscles in the arm shrink. This leads to a corresponding shrink of the arms in these large predators. In each line, if they had continued to evolve, they may have lost their arms a la Moas.

Abelisaurs, however, kept their tiny arms, and what's weird, is that the arm is attached to a completely 360 degree rotational socket, unlike the sockets the rest of us have at the arm. As such, they were able to wiggle and move them a LOT. This leads researchers to think that they were used, specifically, for display.

Remember everyone: every single dinosaur, every single one, is a variation of the peafowl.

They live in *style*.

Megalosaurus

Megalosaurus was the first genus of non-avian dinosaur to be validly named. A Middle Jurassic megalosaur, this species played a pivotal role in scientific understanding of prehistoric life. The creature stood at 6 m in length and weighed around 1 t. A notable theropod in its own right, the original specimen, along with Iguanodon and Hylaeosaurus defined what is considered a “dinosaur” to this day.

Dear Vector Prime, does Magmatron exist in the Viron cluster?

Dear Dinosaur Denominator,

Not to my knowledge, but there is one individual to whom he bears a very strong resemblance. Like Magmatron, he possessed a tripartite spark which could be split across three separate beast modes, each embodying a different facet of his personality: Overkill, the Gigantosaurus; Divebomb, the Quetzalcoatlus; and Splashdown, the Elasmosaurus. As a combiner, they could merge to form a monstrous beast mode referred to as the “Dinosaurer”, in addition to their robot mode combination. He was named Trypticon—after the monstrous beast from Cybertronian legend.

Trypticon was eternally loyal to the Predacon Council, and was the first leader of the cel that came to be known as the “Dinobots”, named for their prehistoric alternate modes. In fact, Trypticon considered it his right to command all saurian Predacons, using intimidation to recruit even experienced veterans like Reachout, and he demanded viciousness from all of his warriors.

For much of the Cybertronian Civil War, Trypticon's domineering and cruelty went uncontested, but eventually the other Dinobots had enough, and a number of them conspired to bring about his downfall. They prevailed by isolating Trypticon's three components and preying on their individual weaknesses. Overkill was provoked into a berserker rage by Sludge, Snarl and Terrorsaur, who put him down once his mind became consumed by blind anger. For Divebomb, Terranotron and Grimlock took advantage of his pride, luring him high into the sky until he was within firing range of the team's ship, the Megalosaur. As for Splashdown, it was simply a matter of isolating him on dry land, where he was vulnerable to Slapper’s earthquakes and Triceradon’s flame breath.

With Trypticon gone, the power vacuum he left behind drew the Dinobots into infighting. While they shared a sense of relief, some were angry over having been excluded from the scheme, and some took the chance to transfer to new positions within the Predacons. The remaining Dinobots, those who had taken part in the plot, disagreed over who was the team’s rightful leader, and squabbled fiercely until Grimlock was eventually accepted in the role. But once they began dealing with the Predacon Council directly, they had their worst fears confirmed, as it became apparent that the brutal methods they had attributed to Trypticon’s ideology were in fact endemic throughout the faction—and with it seeming increasingly likely that an errant ex-Dinobot would tip off the Council as to what had transpired, they begrudgingly made the decision to defect to the Autobot side. For this, they would pay a steep price, when Terrorsaur was slain by a Predacon bounty hunter… but it was their pursuit of revenge which ultimately united the team, and gave them a righteous purpose.

Megalosaurus

(It's their birthday today!!!)