Sorry, I hadn't been paying attention at all to what thread it was I was posting in. Sorry for speaking up in a thread in which clealy I was not asked 
No problem.
Honest mistake.
Malte is correct; those dinosaurs are based on
Iguanodon. Most LBT fans refer to them as “spikethumbs”, though peculiarly, their design in the show appears to be lacking their most famous feature, the large, conical modified thumb claws. You can also see that one of the babies in the picture is standing flat on its front feet; although
Iguanodon was primarily quadrupedal (though juveniles were better adapted for walking on their hind legs), in reality, it walked on the tips of its three central fingers, which were bound together by skin to form a mittenlike hoof. Its pinky finger was prehensile, and could have been used as a thumb (since the dinosaur’s real thumb was a rigid, fused spike, possibly a weapon against predators and/or other
Iguanodon).
It used to be that there were several species of
Iguanodon, but recently the genus has been
split shattered into so many new genera that
Scientific American needed three articles to cover them all. (Here are the articles, in case you wanted to know more:
Part I,
Part II,
Part III).
Iguanodon bernissartensis is now the only species of
Iguanodon still considered valid. The newly renamed genera include the following:
Dollodon bampingiMantellisaurus atherfieldensisDakotadon lakotaensisOwenodon hoggiiBarilium dawsoniKukufeldia tilgatensisHypselospinus fittoniSellacoxa pauliProplanicoxa galtoniI’ve wondered if the LBT
Iguanodon were based off of one of these former
Iguanodon species, since they seem to be rather small compared to the other leafeaters they commonly appear alongside. In real life,
Iguanodon bernissartensis was a rather large dinosaur, with an average length of 26–33 feet (at least the size of an adult threehorn), and even as much as 42 feet (around sharptooth length :blink:). The 20–23-foot
Mantellisaurus would be a better size match for the LBT spikethumbs, but I think of them as
Iguanodon anyway since the filmmakers probably didn’t know about all the different species of
Iguanodon (let alone that they would eventually be considered to
not be
Iguanodon) when they made the choice to include them in the show.
By the way, have you seen the LBT Glossary in the General LBT section? (There’s a link to it in my signature.) It’s a very useful resource if you’re looking for LBT-accurate terms to use in a fanfiction.
