Pastel Paleotober Day 31: The Fighting Dinosaurs ⚔️

The Fighting Dinosaurs are a Velociraptor and Protoceratops from late Cretaceous Mongolia that were fossilized together. They were engaged in a fierce fight and were later buried together in a dune collapse.

38 123

Pastel Paleotober Day 30: Parasaurolophus 🌷

Parasaurolophus lived in North America (and possibly Asia) during the late Cretaceous. It may have used its large, distinctive crest as a resonance chamber to help amplify its calls and communicate with other members of its species.

31 112

Pastel Paleotober Day 29: Cryolophosaurus ❄️

Cryolophosaurus hunted the early Jurassic forests of Antarctica, which was much further north at the time. It posessed a small crest on its skull which may have been used as a signal to recognize other members of its species.

21 98

Pastel Paleotober Day 27: Citipati 💙

Citipati lived in the late Cretaceous desert of Mongolia. One Citipati was fossilized with its arms spread over its nest, trying to protect its eggs from a collapsing sand dune and providing evidence of parenting behavior in non-avian dinos

42 144

Pastel Paleotober Day 26: Amargasaurus 🦕

Amargasaurus was an early Cretaceous sauropod from Argentina. While not as long as some other sauropods, its neck sported extended vertebral spines which, unlike spinosaurus and dimetordon, are not thought to have supported a skin sail.

35 163

Pastel Paleotober Day 25: Tyranosaurus 🦖

The late Cretaceous North American theropod Tyranosaurus is among the most recognizable dinosaurs. While its relatives and ancestors almost certainly had feathers, it may have become bald as it evolved its massive size, similar to rhinos

30 135

Pastel Paleotober Day 24: Juramaia 🐁

Juramaia was a basal eutherian mammal from late Jurassic China and is the earliest known relative of all placental mammals. Its discovery showed that the lineages of placental mammals and marsupials had diverged before the Cretaceous.

27 103

Pastel Paleotober Day 20: Castorocauda 🦫🦦💧

Castorocauda was a semi-aquatic mammal relative from the mid-Jurassic of China. Its beaver-like tail and otter-like teeth suggest that it lived similarly to the modern platypus.

46 186

Pastel Paleotober Day 19: Spinosaurus 🍐

Spinosaurus hunted in the banks and rivers of what is now North Africa in the late Cretaceous. At 15-16 meters in length, it was the largest theropod and therefore the largest terrestrial carnivore ever.

54 204

Pastel Paleotober Day 18: Triceratops 🌟

Triceratops is from the late Cretaceous North America. Despite common scenes of battles with T. Rex, the distinctive crest and three horns of the Triceratops were likely mainly for courtship and displays. It’s also my favorite dinosaur.

43 166

Pastel Paleotober Day 17: Anomalocaris 🦐

At up to 38 centimeters, Anomalocaris was a colossal apex predator for the early to mid Cambrian seas of Canada, China, and Australia. It used its curved mouth parts to catch prey and transfer them to its disk-shaped mouth parts.

60 176

Pastel Paleotober Day 16: Pygmy Mammoth 🐘

The pygmy mammoth evolved from a group of Columbian mammoths that settled the channel islands of California. While its ancestors were 4m tall, the pygmy mammoth only stood at 1.72m (5ft 7 in)—an example of insular dwarfism.

74 236

Pastel Paleotober Day 14: Drepanosaurus 🦎

Drepanosaurus was a Triassic reptile from Italy sporting a bird-like head and a clawed, prehensile tail. This strange combination of features arose during a burst of evolution following the most severe mass extinction in history.

43 167

Pastel Paleotober Day 12: Dimetrodon 🍋🍏

Dimetrodon was an early Permian carnivore, living mainly in the southern United States but with some species spread as far as Canada and Germany. The sail on its back was likely used in displays, much like the antlers of modern deer.

47 213

Pastel Paleotober Day 11: Glyptodon 💐

Glyptodon, a relative of modern armadillos, lived in South America in the Pleistocene. Glyptodon posessed a spikey armored tail that it may have used for defense or in territorial combat.

54 186

Pastel Paleotober Day 10: Procoptodon 🏵

Procoptodon, a genus of short-faced kangaroos, lived in Australia in the Pleistocene epoch. One species, P. goliah, was the largest kangaroo ever at 2m tall and 200kg. It was likely too large to hop and instead walked more like people.

28 147

Pastel Paleotober Day 9: Waimanu 💝

Waimanu of New Zealand lived in the Paleocene soon after KPG Extinction. Taking advantage of the empty nieches left by the disappearance of most large marine predators, Waimanu took to the sea full-time as one of the first true penguins.

34 168

Pastel Paleotober Day 8: Sinosauropteryx 💜

Sinosauropteryx was a small, carnivorous dinosaur from northeast China in the early Cretaceous. Fossilized traces of its fuzzy coat showed that feathers were not unique to birds and may have been common among theropods at the time.

80 208

Day 7 of and
Foraminifera and Pastel gore
This is weird 😅

5 19

Pastel Paleotober Day 6: Meganeura 💙

Meganeura flew through the forests of late Carboniferous France. The high oxygen content of the atmosphere at this time enabled insects to grow much larger than possible today, and Meganeura’s wingspan could exceed 70 cm (2 feet 3 inches).

43 185