#Paleontology #NaturalHistory #ArtAndScience #Biodiversity #ScienceForAll #archaeopteryx

Skull diagram of Paraentelodon intermedium in various orthographic angles. Different angles going clockwise starting top left: Anterior, posterior, dorsal, left lateral, ventral, left diagonal with mouth closed, left diagonal with mouth open.

Paraentelodon intermedium skull diagram.

#sciart #paleoart #paleontology

A partial baleen whale skull in a concretion after successive stages of acid preparation, photographed between baths. Clockwise from upper left: July 25, 2025 - the tympanic bulla is visible, barely protruding from a large, roundish boulder. October 7, 2025 - about 2 cm of rock has been removed, and bone now protrudes 2 cm beyond the rock. November 6, 2025 - same, but the bone now protrudes 3 cm. Dec 20, 2025 - most of the skull is now exposed, and rock remains only within the crevices. February 19, 2026 - all calcium carbonate is now gone from all voides and the earbones have been removed from the skull, now free of cemented matrix.

#fossilfriday On Wednesday I (remotely) presented some of what I've learned in a decade of acid preparation of little Oligocene whales from the Pacific Northwest. Here's a time series of a concretion with a partial baleen whale skull, from July 2025 to February 2026:

New large pterosaur tracks from Korea and their implications on terrestrial behavior - Scientific Reports Pterosaurs were important components of Mesozoic ecosystems, occupying diverse ecological niches from the Late Triassic to the end of the Cretaceous. Among them, neoazhdarchians have been hypothesized...

New paper: possible track evidence of a small reptile or salamander being pursued by an azhdarchid-like pterosaur. Validation of the Witton and @tetzoo.bsky.social model of azhdarchid foraging? Maybe.

www.nature.com/articles/s41...

Spinosaurus aegyptiacus "species complex"

Painterly Procreate sketch of the neck and head of Muttaburrasaurus informed by the new paper "Cranial anatomy, palaeoneurology, palaeobiology and stratigraphic age of the large-bodied ornithopod, Muttaburrasaurus langdoni Bartholomai and Molnar, 1981, from the mid-Cretaceous of Australia" with speculative influence from hooded mergansers and hump-nosed lizards.

Quick Muttaburrasaurus paleoart sketch before bed.

#Muttaburrasaurus #Dinosaur #Paleoart

Muttaburrasaurus

Lake Sturgeon spawning

After disappearing from the Milwaukee River in the early 20th century due to overfishing and habitat loss, the new discovery of an adult sturgeon 20 miles upstream from Lake Michigan is a milestone in a massive restoration project that’s been underway for 20 years www.wuwm.com/lake-sturgeo...

Finally finished that painting of Rice’s Whale (aka the Gulf of Mexico Whale) and added a baby whale shark too because yes. Read further below 👇

a quick tasmacetus sketch… aka Shepherd’s Beaked Whale!

#cetacea #art #dolphin #whales

An illustration of three Chinese Paddlefish swimming in the Yangtze River. Hints of blue sky can be seen through the turquoise water surface. The river bottom is silty and sloping downward. This is still a work in progress, so the paddlefish don't have a lot of detail yet, but the viewer can see the basic colors. They are a darker gray on top, and fade to a cream/white on their bellies. Two of the fish are swimming closer to the river bottom, and one is swimming above them, almost in silhouette along the light of the water surface.

I had wanted to try and finish this for today's #SundayFishSketch, but alas, that did not happen. So here is a work in progress of some Chinese Paddlefish 🐡

New little animation of a couple polycotylids! They have such interesting faces - I wonder if they were doing something similar to modern river dolphins ecologically.

#sciart #paleoart

Pachyaena gigantea
#paleoart #mesonychidae

Ankalagon saurognathus, the largest early paleocene mesonychid and probably the largest mammalian predator of North America of its day.
#ankalagon #mesonychidae #paleoart #sciart

Portrait of the iconic Jurassic pterosaur Rhamphorhynchus
#sciart
#paleoart

Vector illustration of Thylacosmilus atrox, a sabertoothed sparassodont, carrying two babies on her back. It is low slung with sharp claws and a long skull with curved saber shaped canines. It is light brown with a darker back half and scattered white spots. The babies are darker in color to blend in with thier mother's back

#Marchofthemammals2026 day 21: Rounding out our trip to the semiarid scrublands and dry forests of Late Miocene Argentina with a momma Thylacosmilus atrox and her joeys. Kits? Who knows...

Sperm whales caught headbutting each other on camera for the first time Drone footage has revealed sperm whales headbutting each other—something scientists had only speculated about until now. Surprisingly, it’s younger whales doing it, not the giant males researchers…

Sperm whales caught headbutting each other on camera for the first time

Vector illustration of Macroeuphractus moreni, a large carnivorous armadillo, laying down and looking at the viewer. Its skin is dark brown with a rusty colored carapace and claws

#Marchofthemammals2026 day 19: the fearsome Macroeuphractus moreni

#paleoart #sciart #armadillo

Lizard inner ear bones show strong phylogenetic signal and a weak association with ecology.

Thank goodness they finally found something morphological that can be used to infer relationships!

Darwinius

All the king's rexes

I present to you: Ramari’s Beaked Whale (Mesoplodon eueu) sucking up a squid of the Mastigoteuthis genus.

#dolphin #cetacea #whale #ocean

Vector illustration of Megaconus mammaliaformis, an ambiguous Jurassic mammaliaform from China. The rat sized animal is stanced across from the viewer, showing the large spurs on its feet. It is dark grey in color, with a light belly

Get ready for #marchofthemammals2026! Starting off strong in the forests of Jurassic China with Megaconus mammaliaformis

#paleoart #vectorart #sciart

Vector illustration of Jurassic multituberculate Rugosodon eurasiaticus, climbing on the curved branch of Wielandiella, a bennittitale. The rat like allotherian mammal is brown-grey in color with a light underbelly and light spots on its brow. Wielandiella has long curving branches lined with leaf scars, topped with a crown of long, draping leaves. There is a large orange fruiting body in between the branches, dotted with a rough texture

#marchofthemammals2026 day 3: Rugosodon eurasiaticus! Ft. Wieilandiella

Vector illustration of Indohyus indirae, a raccoon sized artiodactyl closely related to whales. This small unassuming ungulate has long legs, a long snout, a thick tail and small hooved feet. It is dark brown with an olivey yellow rump. The animal is seen walking with a lotus leaf in its mouth

#marchofthemammals2026 day 4: Moving on from the Mesozoic to the Early Eocene mangroves of Pakistan with a cheeky Indohyus indirae

Dark, shallow underwater scene showing three Astraspis, yellow, finless, jawless fish with armored head swimming to the right, surrounded by some algae and rocks. 3D artwork.

Murky underwater scene with two Eriptychius, dark brownish, finless, jawless fish facing each other, half buried in the soft sediment, with rocks in the background. 3D artwork.

Top view of a shallow marine environment with Eriptychius and Astraspis, two different species of jawless fishes, loitering around the soft sediment and rocks. 3D artwork.

Look at my fesh
#Art #SciArt

Finally we have Spinosaurus mirabilis Sereno et al. 2026 here