Art by paleoartist Gabriel U, @serpenillus on instagram



Diplodocus (meaning "double beam") was named after the chevron bones under it's tail which at the time were considered very unique. For a while it was considered the longest sauropod but that has later turned out not to be the case with new findings of other sauropods. It hailed from the late jurassic period and most fossils have been found in the Morrison formation in good ol' USA.



Okay yes it's not actually just one dinosaur, it's a genus of a few species. There's diplodocus longus (debated still if it's valid for the species or not), diplodocus carnegii and diplodocus hallorum (which was formerly known as seismosaurus but later indentified into its proper group, though occasionally seismosaurus will still be used as a synonym anyway).



Their skulls were very small compared to their bodies though that's pretty common with sauropods. They obviously had quite the long necks but the interesting part about them is the long tails most often described as whip-like. It's theorized that they potentially used these tails for defense, whipping them around in herds would make a loud sound used in attempt to scare off any predators or they could have used them to literally whip at any attackers. Their reproductive habits are pure speculation and they're lumped in with other sauropods with the theory that they potentially laid their eggs in nesting sites all together as a herd into small pits in the ground that they then covered with a bit of soil before walking off into the sunset. The babies that got to hatch then would have to simply figure out on their own how to survive and many would get eaten up. A bit like the turtles we have now where they're left to hatch and have to make a dash through the beach hoping not to get snatched by a predator because the parent isn't around to protect them.

In depictions they are often portrayed with spike-like appendages along their backs that would've been more skin-like, but even that i've also seen debated (shocking i know).





Diplodocus are the most displayed sauropod and one of the more well known dinosaurs overall due to the large amount of fossil finds. There has been many casts of Dippy the diplodocus donated across the world which is why it is the most displayed sauropod.







Diplo in the dino timeline.



















































Art by paleoartist Teratophoneus on deviantart





Paluditian nalatzensis (paludititan meaning marsh giant) was a genus of titanosaurian sauropods from the late cretaceous period. It existed on an island called Hateg with other creatures like the even smaller sauropod magyarosaurus, believed to exhibit island dwarfism which is a phenomenon that happens when species evolve to be smaller in a limited environment such as an island. Paludititan fossil finds have been made in the current area of Romania.

There hasn't been a whole ton of information published on them or theorization on their behavioral tendencies, they're often depicted with protruding "spikes" on their sides along the spine but that's probably debatable like many things with dinosaurs.



I want to imagine they could've been befriended and they'd take us on rides if we were on Hateg island rn.







Paludititan on the dino timeline. Basically around right before

they all got nuked RIP.