A lot of people hate on this series for lack of prehistoric fauna. I enjoyed (most of) it personally, but I can understand where the haters are coming from.

And this eyesore in "In Cold Blood" sums it up.

In my opinion, the worst scene is the Plesiosaur/Pterosaur/Turtle coasts from an unspecified time in the Mesozoic.

The unnamed Pterosaur, which has pointed wings and long hind limbs, is likely a Pterodactylus,

But, this gigantic unnamed pliosaur (referred to as a higher systematic group, Plesiosauria) appears to be a large Late Jurassic species. But it's quite odd these two are never identified.

It doesn't seem like the writers did any sort of research to find overlapping pterosaur and pliosaur species, or on these two species even. They just slapped them into a scene to check off boxes.

The turtles are also unnamed (shocker). Large sea turtles like Solnhofia lived in the Late Jurassic with Liopleurodon and Pliosaurus funkei, one of which must be the attacker here due to its size.

Basically, LooP vaguely states that marine reptiles and pterosaurs existed. It shows turtles hatching, pterosaurs eating them, and a pliosaur swimming around and eating them.

Scientific inaccuracy isn't this scene's biggest weak point, it's the mere presence of it. The lack of detail given on these two incredible groups just turns it into a bland and argueably unnecessary few minutes.

It's like last minute, they thought "Oh fiddlesticks, we forgot about the other Mesozoic reptiles. Eh, let's just throw 2 random ones in there real quick".