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Lucas Petrin

@fossilfracas.com

580 followers 770 following 80 posts

Associate Editor: Maps and Graphics at NatGeo Magazine. Illustrator, designer and more. Known elsewhere as FossilFracas, or Fracas #Trogtober #Designersaur

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Lucas Petrin @fossilfracas.com · Oct 22

Howdy everyone! I’m an associate graphics editor at National Geographic with a passion for prehistory and fantasy! I make cartoon creatures and trolls in my spare time.

🖥️ Thefracas.art

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Lucas Petrin @fossilfracas.com · Aug 14

Warhammer Wednesday! Capping off my night with a mournfang. I’ve sketched this fellow up to be more ungulate than carnivore.

#warhammerwednesday #ageofsigmar #theoldworld #ogormawtribes #cartoon #mournfang #warhammercommunity

A mournfang, ogor-ridden beasts that thrive in cold environments. They are hoofed predators with long tusks and powerful jaws. Like a bison mixed with a bear, they feature traits of carnivorans and ungulates, almost a throwback to extinct mammals.

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Lucas Petrin @fossilfracas.com · Jul 22

The quest for refinement, resulting in a flamboyant, Fracas-style Compsognathus. Pigeon colors took over, leading to some more stylized feathers and unnatural traits.

A cartoon Compsognathus in expressive, piebald pigeon colors. To its left stands a previous, lower opacity sketch from which it was refined.

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Lucas Petrin @fossilfracas.com · Jun 16

A freak mutation, an island population, a rainforest destination? Trolls inhabiting the Western Rainforests speciated into some of the wackiest, most diverse creatures of the jungles, eating everything from leaves to honey.

Three trolls from a rainforest biome. The Greater honey troll, Common tree troll and Giant fruit troll all occupy different niches that make use of their various proboscis. These beasts are gigantic primates, but have no external nostrils.

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Lucas Petrin @fossilfracas.com · Apr 21

Big thanks to Michael and Dr. Butcher for helping out on this one, and so happy to see it out in the wild! Sloths first, the world next… look out for a post later diving into this graphic a bit more.

Michael Deak @slothfultyrant.bsky.social · Apr 21

Never in a million years did I think that my name would be in National Geographic this early in my career. Huge congrats and thanks to @fracas.bsky.social for bringing the #sloths of the past back to life in this incredible infographic and for having Dr. Butcher and I on board as consultants!

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Reposted by Lucas Petrin

Michael Tripoli @triloboii.bsky.social · Mar 20

The arboreal diprotodontid Nimbadon lavarackorum for day 17 of #marchofthemammals2025. A real wierdo!

#paleoart #sciart

Vector illustration of Nimbadon lavarackorum, a sheep sized arboreal diprotodontid from the middle Miocene Riversleigh Fossil Site. The animal looks like a large wombat or koala, with long arms and large claws. It is climbing up the trunk of a tree, reaching out for an adjacent branch. It is colored grey with a gradient of orange and dark brown, with irregular grey and white spots along its back

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Lucas Petrin @fossilfracas.com · Mar 19

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

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.

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Lucas Petrin @fossilfracas.com · Mar 10

This mean, rocky monster-truck demolished my poor Kruleboyz in my last game of Age of Sigmar. Give it up for the stonehorn!

#warhammer #ageofsigmar #warhammercommunity

The stonehorn is a massive, hooves monster that blindly charges headfirst into anything that upsets it. With brown fur, and sprawling, twisted horns, a stonehorn shears its flesh off with every collision, revealing the calcified and granite skeleton within. Usually, only the face and skin around its weapons are lost.

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Beth Zaiken @bzaiken.bsky.social · Nov 23

A Tylosaurus chomping a smaller mosasaur (platecarpus) for Bluesky! 🥂

Tylosaurus grabs a smaller mosasaur, Platecarpus from the ocean surface

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Reposted by Lucas Petrin

ablob @ablob.bsky.social · Nov 16

excuse me ma’am, you can’t build your nest there

#pokemon #skarmory #fanart

Drawing of a skarmory who has built a huge nest on top of and electric pole and also has babies there. There’s a city worker in a hard hat on a crane trying to reason with the skarmory. Neither party is pleased.

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avi 🌧️ @barghest-land.bsky.social · Oct 23

helloo bsky! i'm here now :) hoping to find a new place to post my works and meet some cool people as well!
i'm a director/art director in animation field, doing mostly paleoart in my free time, but also fanart and field sketches. i'll appreciate any support and will be happy to chat!<3

#paleoart

A portrait of a young female megalosaurus enjoying her snack under some dead trees. Though what (or who) she's eating isn't visible, she has some blood in her mouth, and some flies are flying around. Her skin is a contrast of a large white spot from her eye to the neck, everything else is brown with a subtle tint of green.

Two juveniles unwindia are sitting on a tree, enjoying their snack - they found a dead tupuxuara, that possibly got stuck between the tree and it's branch and died not a long time ago.

A few colored sketches on one page: ammonicrinus attached on the rocks, albino benggwigwishingasuchus standing on the tree being silly and looking at their reflection in the water, simosuchus hiding from the rain under large roots, and a flock of propterodactylus surfing on a rising airflow

A ghost of Iberodactylus flying by the water surface in the night. It's right wing is touching the sea, creating a little wave and the water there glows from it's touch.

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Lucas Petrin @fossilfracas.com · Nov 11

The VHS release for this was so good, they really knew how to make a movie back then.

Reposted by Lucas Petrin

Vincent @domesticus.bsky.social · Nov 11

Wait I don't remember this classic animated film

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Caraid @caraid.bsky.social · Nov 11

"Onyx"

The black dragon Onyx guarding her treasure hoard in the ruins of Xak Tsaroth. Painted in acrylics for the D&D 2024 Dungeon Master's Guide!

A black dragon perched atop a treasure hoard in a damp cave. In the background we see waterfalls pouring down onto the treasure piles, moss covers the stone ruins that hint at long gone civilization. The dragon has a pale face that makes it look skeletal, while her body is covered in black spiky plates, and her back ridged with tall spines. She has an almost serpentine look with a slender body and an enormously long tail curling back around to her front.

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Lucas Petrin @fossilfracas.com · Jul 5

Before I moved to the DC area I had the pleasure of designing the art for The Edelman Fossil Park’s first beer can.

(2022)

Fears Nothing, a dreadnoughtus pale ale, bears a large yellow and orange sauropod on its can. The beast turns to face the horizon as radiating spirals from the coming asteroid impact begin to project themselves across the sky.

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Lucas Petrin @fossilfracas.com · Nov 8

Hell yeah, much appreciated!

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Lucas Petrin @fossilfracas.com · Nov 8

Thank you! Sloths are definitely an under-represented group, it’s crazy just how many species are unknown to the public.

Recently I’ve been a bit slow on the paleoart, definitely something I need to pick back up. Very proud of my beer can labels however. Here’s a hadrosaurus!

Hadrosaurus posed in front of a large NJ label. The state dinosaur of New Jersey, these large animals had dainty forelimbs and thick beaks. They could likely move on their hindlimbs only to some degree.

Reposted by Lucas Petrin

Gaegral OPEN COMMISSION @gaegral.bsky.social · Nov 8

I wanted to create a list of artists with less than 1000 followers, but as I can't remove myself, it is less than 3000
There is some variety
Creatures, paleoart, TTRPG, Fantasy, OC's etc etc
go.bsky.app/SkzK7g6

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Lucas Petrin @fossilfracas.com · Nov 7

Adorable troggy feller

Reposted by Lucas Petrin

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Lucas Petrin @fossilfracas.com · Oct 22

Looking to show off your exorbitant wealth? Buy a Designersaur®!

Cooked in a lab, the aptly named “Dragon” DNA adds a flair only few can afford. A viral process allows features to be altered from vat-grown Stemplates® at will!

#Designersaur

A Designersaur is a dinosaur that has been customized for a particular patron. These curious beasts are all the rage amongst the wealthy. Pictured here: a Tyrannosaurus with baked in koi features and dragonesque touches.

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Lucas Petrin @fossilfracas.com · Nov 7

Those were based on Eremotherium, a close relative!

Reposted by Lucas Petrin

Your Dinosaurs Are Wrong @ydawtheshow.bsky.social · Oct 19

Saw people were doing intros, so we're getting in on the fun. We're Steven and Elizabeth, two people who really want to tell you stuff about dinosaurs using old toys and animation. Our stuff can be found on Youtube (link in bio).

We hope you like it!