A lost children's educational animated 13-episode TV series from the early 90s (could be earlier, but not beyond 1993).
The series was about two mice named Claudia and Tati (or Tatti, but that's just how they were named in a local dub version), and their adventures in the world of dinosaurs. Each episode they would travel to the dinosaur world through an enchanted, magical book, and there they would observe and study about different types of dinosaurs. In the final episode, they witness the dinosaurs' extinction.
In the same local dub, the series was named (in a free English translation) "The Wonderful World of the Dinosaurs".
I have yet found any piece of information, no matter how much I search, no matter what language I use, no matter what the keyworld is, just nothing. I mean, how hard is to find one series with mice and dinosaurs? Pretty much very...
I've been trying to find any bit of information on this for quite time now. This might be not even lost, but extinct...
Please take a look:
I have found every possible animated Gulliver's Travels adaptation in the world, both Western and Japanese, but nothing even close to this very mysterious one.
There's even more to the mystery:
This is a UK DVD release of selected episodes from Saban's Gulliver's Travels. Whether you familiar with Saban's adaptation or not, you can clearly see that the Gulliver on the DVD illustration looks nothing like Saban's Gulliver, but is, based on anything, looks exactly like the mysterious one. There's no doubt that the mysterious Gulliver was in front of the eyes of the artist behind the illustration.
This could be just anything: A pilot for an unreleased series, a random scene from another TV series/movie/OVA/you name it...