Fabio Alejandro Romero

Vector illustration of Pakicetus attocki, a bizarre early whale relative, laying on its stomach looking at the viewer. This strange animal has long legs with hooved feet, a thick hairless tail, small ears and a long, narrow skull lined with sharp teeth for catching fish and other small animals. Its eyes are positioned up at the top of the skull as in hippos to see over the water line. The artiodactyl is reddish brown with a lighter underside

Rounding out our trip to the mid Eocene Kuldana formation with another stem cetacean, Pakicetus attocki #marchofthemammals2026

#paleoart #sciart

Illustration comissioned by Erica @gutsickgibbon.bsky.social for her wonderful video on co existance of Early Homo and Australopithecus lineages at Ledi Geraru.

Link to the video: m.youtube.com/watch?v=CQvC...

Results from the Flocking #paleostream!
Megamastax, Ornitholestes, Tanyka and Eosteus

Illustration of three detailed views of Unio Cumingii shells, a genus related to Gastropoda. The top shell is shown with intricate growth rings and a textured surface, highlighting its natural ridges and concentric patterns. The middle shell is displayed open, revealing the smooth, inner surface with subtle ridges and structural lines. The bottom object appears elongated and narrow, demonstrating another shell form or part of the organism. The drawing uses fine lines for shading and texture, emphasizing the shells' shape and surface features for scientific observation. The style reflects early 19th-century natural history illustration techniques.

🐌 Observations on the genus Unio
Philadelphia, Printed by J. Kay, Jun., & Co. [etc.]1832-[74]

[Source]

a Megamastax explores very shallow waters in search of food, it kicks up fine sediment as it swims along Megamastax is the largest Silurian bony fish found so far. it was only known from a lower jaw bone for many years until 2026 when a full skull was found allowing palaeontologists to find where it may sit in the fish family tree. Its head was incredibly wide at the base but also somewhat flat making it look vaguely like a squashed cone, one of the most interesting features of Megamastax is its tooth cushions which are small bulbs of teeth that were probably used to secure prey in place

an artificial light illuminates an Ornitholestes trying to sleep amongst the branches of a ginkgoale with cf. Eretmophyllum leaves Ornitholestes is a small theropod dinosaur that is of uncertain relation to other maniraptorans (the group of "bird-like" dinosaurs such as Velociraptor, Gallimimus, Oviraptor, and others), though some evidence points to it potentially being the most basal member of Oviraptorosauria. Ornitholestes―unlike its depiction in Walking With Dinosaurs―did not possess a bony crest on its snout, it had a rectangular snout with a long tail and elongated second digits similar to―but not exactly the same as―dromaeosaurs cf. Eretmophyllum leaves are a kind of ginkgoale leaf known from the Morrison formation where Ornitholestes is from, they had an overall elongate profile with a variable amount of small lobes at the top but typically three

in a murky ephemeral pond, a Tanyka swivels its jaw around to feast on the abundant algae present in the water, its lower jaw is the only thing in focus. a blurry forest of Calamites can be spotted in the background Tanyka is a basal-tetrapod from Brazil only known from its lower jaws that suggest it was able to rotate its lower jaws in a novel way, the authors suggest that this feature accompanied by its unique tooth plates could mean it was herbivorous, but they make no definite conclusion Calamites is a tree sized relative of horsetails which is known from the same formation as Tanyka, they looked vaguely like horsetails growing like cone-shaped spruce trees

an Eosteus swims slightly above the other members of its school Eosteus is the oldest known well preserved and articulated bony fish. it's known from China and holds a wealth of information about the origins of bony fish and how we can go about researching basal members of Osteichthyes in the future. it appeared unlike any fish today with low-set eyes, large spines infront of all of its fins (save for the caudal fin), with the dorsal and anal fins being held up by the spines, and also elongate rhombic scales across its body

this week's #Paleostream flocking results!!!

today we sketched Megamastax, Ornitholestes, Tanyka, and Eosteus

I draw medieval ppl sometimes #medieval #slavic #history #wends

Old illustration of Harald Hardrada I did a year ago, the so called last #viking

#history #historicalillustration ##historicalreconstruction #norse

Pachyaena gigantea
#paleoart #mesonychidae

An Eremotherium about to meet its fate in one of several massive eruptions from Ilopango's caldera during the pleistocene.
The Ilopango is one of the most dangerous super volcanoes in the world and it is still active.
#paleoart #sciart

Illustration of a detailed, scientific drawing of a shrimp, labeled "Plesiopenaeus edwardsianus." The main image shows the shrimp’s full body in profile, highlighting its segmented exoskeleton, long thin antennae extending widely above, multiple detailed legs, and a rounded tail. Two smaller inset drawings focus on the shrimp’s head from different angles, emphasizing its compound eyes, mouthparts, and antennae structure. The illustration uses red and brown tones with fine shading to show anatomical details, intended for scientific study from the 1889 Monaco yacht research campaign.

🍤 Résultats des campagnes scientifiques accomplies sur son yacht
[Monaco]Impr. de Monaco, 1889-

[Source]

Illustration of Haolong dongi with Laura Dern for scale (the animal is about the size of a large dog or a minature pony)

Haolong dongi shown alongside the fossil with various close-ups of the preserved skin from Huang et al. 2026.

The new iguanodont with novel skin coverings. In addition to the large scute-like scales on the tail, the body is covered with what the author's describe as "spikes". The largest ones are about 4 cm long but almost a cm thick, resembling short quills. The smaller ones are hair or eyelash-like.

＃みんなでつくるBluesky古生物図鑑
ケリブルークシア
Kellibrooksia macrogaster
後期石炭紀（Pennsylvanian）中期　モスコビアンMoscovian
アメリカ、イリノイ州（メゾンクリーク生物群（エセックス動物群））
推定体長　7㎝
海産
節足動物　Arthropoda
甲殻亜門　Crustacea
軟甲綱　Malacostraca
コノハエビ亜綱　Phyllocarida
ホプロストラカ目　Hoplostraca
サイロカリス科　　Sairocarididae

Illustration of a lion with wings in profile, coloured with six different colours on different sections. The colours represent phases of casting, and phases 1 and 2 (the majority of the main body) are ascribed to the original Tang sculpture.

A real globe-trotting cat for #GlobalCatDay 🐈

Isotope analysis of the Winged Lion sculpture in St Mark’s Square, Venice suggests it began life as a tomb guardian in Tang Dynasty (AD 618–907) China, travelling to the floating city via the Silk Roads.

🆓 doi.org/10.15184/aqy...

🏺 #Archaeology

Some work out recently made, Cetotherium riabinini is a small baleen whale from the Late Miocene of the Eastern Paratethys sea (Ukraine), a almost complete individual show it had remarkable body proportions unlike modern elongated species in a minuscule size.

Some work out recently made, cetotherium riabinini is a small baleen whale from the Late Miocene of the Eastern Paratethys sea (Ukraine), a almost complete individual show it had remarkable body proportions unlike modern elongated species in a minuscule size.

Panthera fossilis is a lovely big cat

A speculative, elaborately ornamented, cow-like horned dinosaur adapted for life on open savannahs.

Speculative shaggy, tailless and short-frilled horned dinosaurs with scooping, shovel-like nasal "horns" in a snowy setting.

A speculative armoured therizinosaur adapted for high browsing in a tropical landscape. Possibly the stupiest animal concept you'll see today, maybe the stupidest you'll see all week.

A speculative gigantic sauropod adapted for browsing grasslands during the cool of the night. It's so big that the moon has abandoned its usual passage around the Earth and now orbits the sauropod.

To liven up Tuesday afternoon, have some speculative #dinosaurs adapted for modern habitats. Respectively, they are the magnificent and steppe fissurefrills, the berk, and the grand field titan. It's nice to take a break from pure #paleoart every now and then, and designing animals is fun.

Pappocetus lugardi, probably the largest known protocetid.
#sciart #paleoart

Left lateral skeletal diagram of Deinosuchus hatcheri

It's World Crocodile Day and I conveniently just finished my skeletal of Deinosuchus hatcheri, a gigantic crocodylian (or near crocodylian) from Campanian Laramidia. This has been in the works for a long time and it feels good to have it done.
#WorldCrocodileDay #dinosaurs #paleoart #Deinosuchus

Here is the target and setting for my project, the planet Sienna. Wet, oxygen-bearing, yet sweltering, it presents both opportunities and challenges for the robots.

Link to webpage: sites.google.com/view/uponsoiltheymade/initiation/one-story-among-many

This might be one of my favorite diagrams I've made, a multiview diagram of the holotype of Parasaurolophus cyrtocristatus, the best hadrosaur. It was a fun to figure out how best to represent multiple views. #paleoart #fossilfriday

WIP skeletal diagram of Deinosuchus hatcheri with out any soft tissue. Scale bar is 1 meter long.

Here's an update on my Deinosuchus skeletal. Nearly all the bones are done, just gotta finish the skull detailing and the osteoderms. Also the back leg. But theoretically in the home stretch. #paleontology #Deinosuchus #paleoart

Skeletal drawing of the skulls of three individuals of Deinosuchus in left lateral view.

First post here, I've got some new skeletals to share, but wanted to drop this WIP - I've been (slowly) updating my Deinosuchus diagrams from the ground up. Here are three specimens of the western species: TMM 43620-1, AMNH 3073, and TMM 43632-1.

The newly-described tortoise, Chelonoidis pucara, about to be deadlifted by a grumpy Megatherium americanum in Pleistocene Argentina 🇦🇷, 16 KYA.

#paleoart #sloth #animals

Mirebrute troggoths are hulking, scaled humanoids with large tusks and ears. They spend most of their time marinating in the swamp, eating carcasses and thickening their hide. When captured by the greenskinned orruks, they become mounts for the most bully riders. Despite being harnessed and driven forwards, they hold onto their weapons freely, swinging at anything they feel compelled to.

It’s #WarhammerWednesday with a Mirebrute Troggoth! These swamp-dwelling beasts can fully regenerate from horrific injury, recovering from lost limbs and “certain” death. Painfully stupid, they are given massive clubs and ridden into battle by the tribes of swamp orruks.

#warhammer #ageofsigmar

Blocked account heading for a "TracyFellas #NAFO NC" and a bunch of emojis followed by "democrat" with more emojis. Their username is @spoont51.bsky.social

Heads up, y'all - this account, spoont51 . bsky . social, isn't a real person, but most likely an LLM operating out of another country. This account's handlers are targeting LGBTQIA2S+ users and their followers and adding them to blocklists/target lists for harassment. Block and report.

I should say that this Monday finally after a year waiting I got a new laptop, though I have yet to settle some things before taking it, I started to prove it to see how well it runs, so far painting has improved, here is a funny cow as a first try

Andrewsarchus mongoliensis
#sciart #paleoart

Here the result of the St. Bathans fauna stream! This one took us into the early Miocene of New Zealand, the Moa's ark, as some call it. After many formation streams with very few birds this one has probably way too many!
#paleostream #paleoart #sciart

And so concludes this short and relaxing formation #paleostream!
The Soom Shale is a late Ordovician lagerstätte with few fossils but often times exceptional preservation.

CollectA toy of Dearc

Palaeoplushie by Rebecca Groom of Dearc

Dearc toy by LittleSofts

Reconstruction of Dearc with a Middle Jurassic Megalosaurus-like theropod

Happy Birthday Dearc! The first named Scottish pterosaur, described in 2022, Dearc the birthday boy, is now 3️⃣! Since its discovery, it got a new neighbour (other Scottish pterosaur, Ceoptera) and has been recovered as one of the "missing links" in pterosaur evolution. Also, immortalised as toys!