Tosha
@fishboy86164577
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Paleoartist focused on mesozoic marine reptiles/their ecology and environment! | portfolio: | views my own
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#PortfolioDay
I’m Tosha, I’m a paleoartist specializing in marine paleoart. I do paintings/illustrations & technical art like skeletal diagrams
▶️I don’t take private commissions but you can hire me for work on publications at toshahollmann2
@gmail
.com
▶️
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A young spinosaurus foolishly ventures out to sea. A mated pair of Brachauchenius investigate the strange newcomer. They are not picky eaters.
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Suevoleviathan disinteger, a weirdly proportioned Jurassic ichthyosaur
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Athabascasaurus, an ichthyosaur that inhabited the Western Interior Seaway during the Albian, comes to the surface to breathe at early morning
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Muiscasaurus catheti, an ophthalmosaur from the Paja Formation, swims through an algal bloom hunting a school of fish nearby
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New Mosasaur dropped- the tiny and bizarre Xenodens! You know this animal is weird when it’s teeth are like no other tetrapod and are most similar to razor wire. What could it’s ecology be? Like a Cookie cutter? Dogfish? I’d love to hear your thoughts!
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The gigantic and bizarrely proportioned Archelon. This skeletal is specifically modelled after the largest specimen, Brigitta. I suspect Brigitta is male given the very long tail, extra bone near the pisiform, and massive flippers. Those traits seem to be variable among specimens
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Pervushovisaurus, an apex predatory ichthyosaur from the Cretaceous, notable for its long and slow skull. Makes for a very sleek look.
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Open water is dangerous
A Toretocnemid ichthyosaur is close to meeting its unfortunate end to a gigantic Himalayasaurus
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Gyrosteus, a giant Sturgeon relative from the Early Jurassic! It swam through European seas alongside ichthyosaurs and plesiosaurs. This revamped version of my old reconstruction was done for a newly released publication by researchers Sven Sachs and Jahn Hornung, linked below ⬇️
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The massive fires and floods of the K-Pg mass extinction must’ve been such a sight to see... poor titanosaur
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The largest marine reptiles to scale, featuring Captain Haddock
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Really happy with this one, a startled Edgarosaurus is met with the haunting giant shape of Onchopristis in the depths of the Thermopolis shale
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Dunkleosteus skeletal. This is a somewhat atypical reconstruction, and I purposefully wanted to provide an alternative second look at this thing’s anatomy. Thread with explanations below ⬇️
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An elasmosaur cruises through the shallow coast of the Glen Rose formation
Small explanation of how I reconstructed the environment below 🔽
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Helicoprion.
This skeletal is based off of the anatomy of smaller, more distantly related Eugeneodonts than I would consider preferable, unfortunately they are the only ones for which we have well preserved cartilaginous anatomy. That said, I’m quite happy with this result.
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People really refrain from drawing Spinosaurus and then draw smth like Dakotaraptor huh
Anyways here’s a Speen because I think not depicting some extinct life only because we don’t know much about is pretty stupid
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My skeletal of the metriorhynchid Thalattosuchus. This animal is what people think of when they think “Metriorhynchus.”
It was a pain to make, wading through century old papers with few illustrations was really annoying
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My reconstruction of Tanystropheus hydroides, a large (up to 5 meters in length) and semiaquatic ambush predator that used an elongated neck and laterally-directed strike of the jaws to hunt aquatic prey.
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Eromangasaurus australis forages for tidbits on the sea floor. Based on preserved gastric contents indicating elasmosaurs of the region had benthic animals play a big role in their diet
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A giant Cymbospondylus cruises along while a crinoid raft floats above
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Australia, Early Cretaceous. Eromanga Sea. Winter. Evening.
A mother Kronosaurus and her daughter loom through the dark waters near an iceberg.
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Palaeophis toliapicus, a member of a fascinating lineage of marine snakes.
This was done for a new blog post at Sobek’s Swimming Pool all about SEA SNAKES, read below ⬇️
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A skeletal of the phytosaur Machaeroprosopus gregorii (formerly ‘Redondasaurus’).
While reconstructing this thing I thought a lot about phytosaurs and how they may have lived. Thread below 🧵⬇️ (1/12)
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Guizhouichthyosaurus, a large finned Triassic ichthyosaur. This animal has a very fun body shape to draw
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I notice a lot of people struggle with the ins-and-outs of pliosaurs when depicting them. Here’s a very crude guide to help people through drawing these animals. I’ll do a second one with intricacies of postcrania and proportions later at some point so stay tuned for that
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Tuarangisaurus, a very long-necked elasmosaur from the Campanian of New Zealand, that I drew resting just under the surface of the water
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O. megalodon, based primarily on Cooper et al. 2022 and Cooper et al. 2020. This is scaled as specimen IRSNB P 9893, but O. megalodon may have grown even larger than this according to recent research
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#JurassicWorldEvolution2
recently showed off its Elasmosaurus design
To no one’s surprise the design was very innacurate to the actual animal, probably on purpose
However this does give me the chance to break down the design and talk about RECONSTRUCTING
#ELASMOSAURUS
THREAD⬇️
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Sclerocormus was a strange, short snouted, button-toothed ichthyosauriform from the Triassic of China. Although it’s known from deposits that represent an open ocean, I’ve depicted this one coming close to the shore.
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Mosasaurus sevciki, a mosasaur described in Hani Faig Kaddumi’s book “Fossils of the Harrana and the Adjacent areas.”
Some comments about its taxonomy below ⬇️
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Sidenote about that previous Libonectes holotype tweet but I love this photo. Look at them go
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Saurodon, yet another fish from the Western Interior Seaway. This fish was named before even the word “dinosaur” was coined.
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Nichollssaurua, a small leptocleidid, cruises through the waters of the Clearwater formation, while the unnamed polycotylid TMP 95.87.01 swims up towards it.
Read more below ⬇️
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Cw: blood
The tables turn as the hypercarnivorous ichthyosaur Kyhytysuka goes in for a devastating finishing bite on Acostasaurus, a small pliosaur
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Paleoart PSA- aside from their specialized ecological function, leatherback sea turtle “ridges” actually have a bony component, so putting these kinds of features on marine reptiles without evidence is probably a bad idea
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The giant itself, Livyatan. Scaled with the proportions of Brygmophyseter, a (potential) close relative. Scaling like this gives a total length of only about 12 and a half meters, which makes sense in light of other macropredatory cachalots having proportionally massive heads
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A complete chart of known mosasaur scales!
Unfortunately, this is only really useful if you’re drawing them suuuper close up
Twitter will probably destroy this thing, FULL HD BELOW ⬇️
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Chile, Early Cretaceous
While a mother Myobradypterygius hauthali is giving birth, two Undorosaurus-like ophthalmosaurs steal one of her newborn children
Thread on these animals and the amazing site they are from below ⬇️
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Protosphyraena- a very sleek, beautifully built fish from the Western Interior Seaway
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New drawing! MPC-D 100/1359, the new ankylosaurid specimen, shown here having partially dug itself into the sand for defense, camoflage, and to cool off in the below ground sands. A subadult Tarbosaurus visiting from a different formation on a search for food is left bamboozled
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Tw //// lots of gore
This definitely isn’t realistic in any way, but all the K-pg pieces I’ve been seeing got me inspired and I had to get this idea out of my system. The winds and the force of the Chixclub meteor rip off part of the skin of an unfortunate titanosaur.
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IT’S OUT! 17 METER LONG ICHTHYOSAUR WOOO
It's finally out! Paper on the exceptionally large Jim 2! This paper shows an exceptionally quick increase in size following the Permian extinction for ichthyosaurs, with Cymbospondylus youngorum having a skull around ~2m. I'll probably write something more detailed later.
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Ubirajara is the new theropod on the block, so I made a gif showing off it using its weird filaments as a mating/threat display
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A new genus of large ichthyosaur from the Jurassic of Kazakhstan was published earlier this year and 2019 and was subsequently completely ignored due to the papers being only in Russian, meet Kazakhstanosaurus shchuchkinensis and Kazakhstanosaurus efimovi!
Thread below ⬇️
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Grendelius mordax was a moderately large ophthalmosaur from the Boreal Sea of the Late Jurassic.
This powerful animal had large and robust teeth and a robust skull, cementing it as a predator high up on the food chain.
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Kronosaurus, or whatever. This reconstruction should be taken with a spoonful of salt because there are a million unknowns or variables etc with this animal that make any skeletal pretty speculative, but I’m pretty happy with this result as of now.
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The new ichthyosaur Auroroborealia incognita, at this time of year, localized entirely within your kitchen
Two Auroroborealia swim up at the Russian arctic in a large plankton bloom, searching for potential prey also attracted by the bloom
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Gunakadeit joseeae, a Thalattosaur from the Triassic of Alaska. This interesting little critter had a very developed hyoid apparatus and potentially suction fed! Its environment was also interesting, living in a volcanic island chain full of coral reefs!
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I want to make a new Tuarangisaurus drawing for
#PrehistoricPlanet
, but for now have a repost of my old one
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@arvalis
The most aesthetically pleasing is the Falcata and I will not be taking criticism on that
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Sketch of Lorrainosaurus keileni- a newly described pliosaurid from the Middle Jurassic of France
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Cimolichthys was another scaleless (but not scuteless!) fish from the Western Interior Seaway. These soft bodied fish protected themselves with rows of scutes on top and below the animal’s body.
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So there’s that new paper that said Thalassodromeus had a high bite force... poor Anhanguera...
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Pachycostasaurus dawni, a weird little pliosaur from the Oxford Clay possessing small flippers and pachyostotic ribs similar to a manatee
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Here’s my skeletal (only figuring the head though) of Helicoprion. People fail to realize how absolutely massive these things got. Also, reminder these animals were super sharklike and did not look much like chimaeras at all
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Enchodus petrosus, an iconic fish from the Western Interior Seaway. This scaleless mesopelagic fish was a relative of modern hammerjaws and lancetfish.
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You all trying to figure out dinosaur tail fan shape for dromaeosaurs and oviraptorids and such really need to stop worrying about it so much, they were for display so they likely had ridiculous variation
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My reconstruction of Guizhouichthyosaurus, a large shastasaur (?, depending on how monophyletic they are) from the Triassic of China. Notice the small head, poorly ossified flippers, and high vertebral count characteristic for this group.
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I love ophthalmosaurs, especially platypterygiines. So I figured I’d make a little guide to reconstructing their weird and unique nostrils.
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Yet another Pliosaur turned into a dinocroc with flippers, sigh…
Only 6 days left until Jurassic World Evolution 2 launches, Park Managers!
Where will you be playing? PC, PlayStation or Xbox?
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Didn’t have time to prepare anything new for Halloween so have this repost of my Himalayasaurus
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First try at an extinct mammal skeletal. This is one of the fabled macroraptorial sperm whales, Acrophyseter robustus. Postcrania is reconstructed mostly from Brygmophyseter shigensis & Zygophyseter valorai
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Tethysaurus, a funky mosasauroid from Africa. Here I depicted two of them chilling out in a bed of seaweed!
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Bonnerichthys, a somewhat delayed final entry in my Western Interior Seaway fish series
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Really goes to show they have no idea what they’re doing
Forget Giganotosaurus being the Joker. This movie will be my Joker arc.
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It’s my birthday! To celebrate, here’s my drawing of Gyrosteus: a 7 meter long filter feeding sturgeon relative of the family Chondrosteidae from the early Jurassic. Essentially Leedsichthys before Leedsichthys. The plesiosaur nearby is Hauffiosaurus
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Pachyrhizodus caninus, a very cool fish to continue my series on fish from the Western Interior Seaway
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Cobelodus, a weird paleozoic shark I recently found out about!
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Khinjaria acuta, a strange plioplatecarpine from Morocco. Restoration based mostly on Goronyosaurus, as well as Selmasaurus & Angolasaurus.
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