Genus: Kaprosuchus

…an extinct genus of mahajangasuchid corcodyliform that lived during the Upper Cretaceous period. Kaprosuchus was largely thought to be a terrestrial predator due to the positioning of its orbits, which are positioned dorsally, and its enlarged caniniform teeth are sharp-edged and straight. Kaprosuchus likely was an ambush hunter and hunted like a big cat, using its large tusks to take down relatively large dinosaurs.



Images: Jeslin and Carol Abraczinskas


Genus Araripesuchus - Cretaceous crocodyliforms that existed 125 to 66 million years ago. 5 species are documented in this genus, including the “boar croc” (my favorite), “dog croc”, and “rat croc” illustrated here.

With their fast, long legs but still distinctly crocodilian bodies and heads, these are some of the most dragon-like creatures, extant or extinct, that I’ve ever seen.

Cold snap: Climate cooling and sea-level changes caused crocodilian retreat

via: Imperial College London

Fluctuating sea levels and global cooling caused a significant decline in the number of crocodylian species over millions of years, according to new research.

Crocodylians include present-day species of crocodiles, alligators, caimans and gavials and their extinct ancestors. Crocodylians first appeared in the Late Cretaceous period, approximately 85 million years ago, and the 250 million year fossil record of their extinct relatives reveals a diverse evolutionary history.

Extinct crocodylians and their relatives came in all shapes and sizes, including giant land-based creatures such as Sarcosuchus, which reached around 12 metres in length and weighed up to eight metric tonnes. Crocodylians also roamed the ocean - for example, thalattosuchians were equipped with flippers and shark-like tails to make them more agile in the sea.

Many crocodylians survived the mass extinction that wiped out almost all of the dinosaurs 66 million years ago, but only 23 species survive today, six of which are classified by the International Union for Conservation of Nature as critically endangered and a further four classified as either endangered or vulnerable…

(Read more: PhysOrg)

illustration by Robert Nichols/Imperial College London

Stratiotosuchus maxhechti attacking a juvenile titanosaur. Art by Maurílio Oliveira (Museu Nacional, Rio de Janeiro).

Baurusuchid crocodyliforms as theropod mimics: clues from the skull and appendicular morphology of Stratiotosuchus maxhechti (Upper Cretaceous of Brazil)


Zoological Journal of the Linnean Society Volume 163, Issue Supplement s1, pages S37–S56, December 2011

Sotmatosuchis inermis

…was a very large (10m/32ft) stomatosuchid crocodilian from the late Cretaceous of Egypt. Unlike many other crocodyliforms it is largely unknown what exactly S. inermis ate. Its flattened skull had a long, lid-like snout which was filled with small conical teeth. Some theorize that the mandible might of been toothless and supported a pelican-like throat pouch. 

Sadly the only known specimen (a large skull, collected by German paleontologist Ernst Stromer) was destroyed when the Munich Museum was bombed in 1944.


Animalia-Chordata-Reptilia-Crocodylomorpha-Neosuchia-Stomatosuchidae-Sotmatosuchis-S. inermis

Image: Dmitry Bogdanov


A study of Saurian morphology: Pseudosuchia (part 2)

Reposting because I have no idea what happened but my post disappeared? Now that I’m fully sober I should add some information about these fellas.

The three depicted above belong to the group Crocodylomorpha, a group that was very diverse during the Mesozoic. Sphenosuchus was a small, gracile basal crocodylomorph that might have been biped for a short burst of time—just like today’s Basilisk lizard for example.

The other two represent a major clade of marine crocodiles known as Thalattosuchia, Neptunidraco is classified under Metriorhynchidae, a family of fully aquatic crocs which had lost their scutes and developed flipper-like limbs and tail fin to complement their pelagic lifestyle. 

Machimosaurus on the other hand, represents the Metriorhynchidae’s closest relative Teleosauridae, a family of gharial-like marine crocodyliforms. This fish-eating genus recently circulated around the internet after the announcement of M. rex, probably the largest teleosaurid known at (est) 9.6 m (31 ft) long—but we all know it’s mostly due to the “rex” on its name.

I should probably start writing proper captions for my future posts because the world needs to learn about flippercroc and its funky relatives. They’re like, the weirdest crocs ever. Or not. You’ll find out in 3 days.

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Will Art for Science · Find me elsewhere


The Wealden Crocodyliformes Trilogy by Mark Witton | Blog | Twitter. Click the episode links for the full articles:


Palaeoartworks: a palaeoart gallery at Lyme Regis, April 7th - May 4th

Mark Witton: “So, what can you expect from the gallery? Hopefully, there’s a wide enough range of restorations to keep most tastes happy: dinosaurs, pterosaurs, Crocodyliformes, invertebrates, marine reptiles, even some fish. These are organised into are three collections. The first is dedicated to palaeoart of the Wealden Supergroup, a sequence of Lower Cretaceous sediments found throughout south-east England with an intensely studied palaeobiota and palaeoenvironment. Regular readers will know that I’ve been publishing a lot of Wealden artwork recently - enough, it seems, to fill the wall of a gallery - and my favourites are now on display.” More info