This one I would rate as medium. This is small sized ceratopsian.
Reminder: hide your answer behind a content warning. This will allow others to guess without a hint. I will post the answer tomorrow (and to anyone who guesses correctly).
This was designed by Kongzilla and modified to a new species by me
In 1994, Colombian paleontologist María Páramo, published the details of the, at the time, most complete mosasauridae from South America.
The original skull was 47cm in length, and it was estimated to be 5m long. Since then a far larger, 87cm skull has been found. This implies that it could grow far larger, comparable to other larger mosasaurids.
Oligocene-Miocene silicified palmwood (Palmoxylon sp.), east Texas. I once used it as a #flintknapping hammerstone. The dots in 2 photos represent sclerenchyma vascular bundles. It was found near crocodilian #fossils, so based on the rounded shape it could be a gastrolith. #FossilFriday
This one I would rate as hard. This mid sized marine reptile is known from Colombia, South America.
Reminder: hide your answer behind a content warning. This will allow others to guess without a hint. I will post the answer tomorrow (and to anyone who guesses correctly).
I was trying to take a nap, but I was awakened by a nightmare: in my dream, early-branching tetrapodomorphs like Acanthostega and Ichthyostega with 7+ fingers were denounced as forgeries of so-called "AI" and erased from natural history.
Like nearly all dreams, it didn't make any sense when examined in the cold light of reality. At least, I hope not.
Happy #FossilFriday, check out this skull from a juvenile Gryposaurus! These hadrosaurs called North America their home roughly 75 million years ago, and this particular individual would have enjoyed the lush jungle that makes up the Kaiparowits Formation. (1/2) #paleontology#dinosaur#science
Here's my finished, coloured Procretevania exquisita drawing. This was a hatchet wasp from the Yixian Formation of China; hatchet wasps still exist today and specialise in parasitising cockroach ootheca. #FossilFriday#paleoart#wasp#insect#entomology
Modern flakes of the same Oligocene silicified wood from west-central Louisiana. Top views are a flintknapped perforator. This particular "petrified wood" (~50 lb. block) is extremely hard & mostly only suitable for tool production. #FossilFriday#fossils#Archaeology#Flintknapping
This one I would rate as medium. This mid sized Macronarians is known from North America
Reminder: hide your answer behind a content warning. This will allow others to guess without a hint. I will post the answer tomorrow (and to anyone who guesses correctly).
For #FossilFriday, we're taking a look at not true fossils, but preserved mud cracks. Below this incredible natural cast of a Eubrontes track, the wide mudcracks were formed during a period of drought and later preserved by water carrying sediment. (1/3) #paleontology#ichnology
This one I would rate as medium. This small Thyreophora is known from China.
Reminder: hide your answer behind a content warning. This will allow others to guess without a hint. I will post the answer tomorrow (and to anyone who guesses correctly).
This was designed by Kongzilla and modified by me into something new
For #FossilFriday, 2007 @Utahpaleo.org excursion into what will soon be called the Santonian age Emery Fm. with Kevin Bylund turning over to our care and Tom Mellenthin's preparation skills, a beautiful Placenticeras syrtale that is now exhibited at John Wesley Powell River History Museum in @greenriverutah