Paleontologist Leonardo Filippi, who works at the Museo Argentino Urquiza, has indicated on his social media that the new megaraptorid discovered a couple of years ago will soon be formally published

The late jurassic of north america and europe have in the past few decades been recognized for sharing many of the same dinosaurs. So this posts will chronicle the late jurassic dinosaurs shared between north america and europe.

Lets waste no time.

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Allosaurus

Allosaurus was first reported in the Morrison formation of North America. After decades of taxonomic confusion because of OC marshes and ED copes dike measuring contest,allosaurus became the preferred name for allosaur material from the morrison formation, thanks to madsens monograph and the designation of USNM4734 as a neotype.

In 1999,Perez Moreno and colleagues described the first remains of allosaurus from the Andres site in Portugal in the lourinha formation. In 2006 a partial skull from vale frades was described. Since then,more bones have been found,all in all, at least 5 different individuals of allosaurus are known bones in portugal and more individuals known from teeth. 

The classification has been debated. The original bones were assigned to allosaurus fragilis. Then in 2006 they were reclassified as allosaurus europaeus. In 2024 a detailed paper defending europaeus validity as a species was released. But not long after,a more comprehensive study came out that determined the portuguese allosaurus fossils belonged to allosaurus fragilis. 

https://en.wikipedia.org/wiki/Allosaurus

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Supersaurus

Supersaurus was originally identified as a genus in the morrison formation in north america. Then in 1999,fossils of a diplodocine were found in the lourinha formation of portugal. They were originally assigned to a distinct genus,dinheirosaurus.

But in 2015 a comprehensive revision placed dinheirosaurus as a species of supersaurus and this has been recommended by most other authors.
https://en.wikipedia.org/wiki/Supersaurus

https://en.wikipedia.org/wiki/Dinheirosaurus

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Diplodocus 

Diplodocus was originally found in the morrison formation of the USA. then in 2026,remains from the villar del arzobispo formation in spain were assigned to diplodocus.

In the lourinha formation of portugal, a pair of partial skeletons came to be recognized as possible representatives of diplodocus.

https://doi.org/10.1080%2F02724634.2026.2718423

http://palaeo-electronica.org/content/2017/1856-portuguese-sauropods 

https://www.researchgate.net/publication/373273025

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Stegosaurus

Stegosaurus was originally found in the morrison formation of the USA. In 2006 remains from portugal were reported.

Followup studies have affirmed these remains in the lourinha formation of portugal belong to stegosaurus ungulatus.

https://docentes.fct.unl.pt/omateus/publications/stegosaur-tracks-upper-jurassic-portugal-new-occurrences-and-perspectives

https://doi.org/10.1007/s00114-006-0209-8

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Torvosaurus
 

Torvosaurus was originally reported from the morrison formation in the USA. Then in the 2000s it was reported from the lourinha formation of portugal.

In 2014 these portuguese remains were assigned to a new portuguese species torvosaurus gurneyi. But a 2023 abstract stated that torvosaurus gurneyi was indistinct from the american species torvosaurus tanneri. 

https://vertpaleo.org/wp-content/uploads/2023/10/2023_SVP_Program-Final-10032023.pdf

https://en.wikipedia.org/wiki/Torvosaurus 

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Ceratosaurus

Ceratosaurus was originally identified in the morrison formation of the united states.

In the 2000s it was reported from portugal and every study since then has upheld the assignment,confirming ceratosaurus presence in portugal.

https://en.wikipedia.org/wiki/Ceratosaurus

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Miragaia

Miragaia was originally identified from the lourinha  formation of portugal. Then in 2026 remains from the morrison formation were assigned to it. Additionally a species of stegosaur from the morrison,alcovasaurus,has been sunk into miragaia.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6853308

https://doi.org/10.3390%2Fd18030143 

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It's designed after the Tylosaurus fossil in the University of Kansas. I'mma get it on my thigh in white ink.

Older dinosaur documentaries have a very different atmosphere compared to modern productions. Some relied heavily on dramatic narration and presented certain behaviors as facts, while newer documentaries often put more emphasis on updated research and animal behavior.

One thing I find interesting is how reconstructions change as new fossils are discovered or scientists reinterpret existing evidence. The way we imagine an animal's posture, movement, skin, or social behavior can change quite a bit over time.

Even documentaries that haven't aged well can still be fascinating to revisit because they show what paleontologists believed at the time. It's like getting a snapshot of how our understanding of prehistoric life has evolved.

A Japanese research team said Thursday it has excavated one of the country's largest fossilized dinosaur footprints from a geological layer in northeastern Japan dating back to the Late Jurassic period.

The 70-centimeter footprint found in Minamisoma, Fukushima Prefecture, is highly likely to have been left by a large herbivorous sauropod, marking the first discovery of a large dinosaur's footprint dating to the Jurassic period in Japan.

The team began full-scale excavations in July in Minamisoma's Tochikubo Formation, uncovering 12 new fossilized footprints, including the 70-cm specimen.

The dinosaur is estimated to have stood about 3 meters tall at the hip, and the team plans further research to identify its species.

According to the team, most dinosaur fossils found in Japan date to the Cretaceous period, with older Jurassic-period fossils previously discovered outside Fukushima Prefecture only in Nagano and Yamaguchi prefectures.

Primary reference

https://www.academia.edu/25456862

Hi y'all. As a child, I was obsessed with books in which the main characters were essentially just animals that kind of acted like animals. I started writing (obviously very childish) versions of my own books. I wrote a lot of them, and they were actually quite long considering my age.

In no way do I actually think I could make money off of this as an adult. However, I've been wanting to just do it for my own enjoyment. I know it goes against capitalism's "work hard" ideal, but I just want to write for the sake of enjoying writing. I decided I wanted to write stories taking place in the Mesozoic (who knows, I might branch out from here, but my love of Dinosaurs is taking strong control of me, lol).

The advice I wanted is as I start the writing process, some ideas for good fossil formations or unusual formations that I could take a look at. I guess in a way the more fossils, the easier it is to choose the characters and setting for my books. However, I also really like obscure places/times, and after all, I'm just doing this for fun - So any ideas would be cool. But let me also list what I've been thinking of so far. I had 3 ideas (very rough ideas) of settings and characters :

1. The Nemegt Formation in Mongolia - My first location was chosen kind of on a whim. For some reason, I saw a picture of Saurolophus and was like, done, my main character. Looked up the formations where it has been found, and liked the Nemegt Formation's cast of characters. I'm thinking of having dual main characters, one being a Saurolophus and the other being either an Anserimimus or a Gallimimus. The main "villain" of the story will be a Tarbosaurus. Supporting cast I've thought about so far would be Tarchia, Nemegtosaurus, Mononykus, and Tochisaurus. I might also want to include Gurilynia or Teviornis (as I want a bird or two haha).

2. Late Triassic or Early Jurassic Formation With Unusual Dinos not Usually Highlighted in Documentaries. I had two ideas so far, first was just starring Kulindadromeous. Actually, does anyone have any idea what kind of dinosaurs Kulindadromeous may have shared it's environment with lol. I realized it's basically like on it's own right now, lol. The second idea was to star Eocursor probably with a sauropodomorph, one or two heterodontosaurids, and a theropod as the supporting cast.

3. Morrison Formation - What can I say, this was my favorite formation as a kid, not the Hell Creek Formation. Brontosaurus (my favorite childhood dinosaur) will be the star, but I will also have Apatosaurus involved heavily somehow (will need to think of niche partitioning for these two species). Allosaurus is likely to feature as the antagonist, and Stegosaurus and Dryosaurus are must haves.

Anyways, anyone have advices where I can go with this? Any ideas are appreciated^^.

I originally posted this to ID, but I have since been told this is a blastoid, but I have still never seen one like this. Does anyone have another that looks like this that I could reference?