Hi Petrie; cut the "Para"
As the others already said Ducky is not a "Para"saurolophus and back then you and I also agreed that she was probably a Saurolophus.
The most distinct example for Ducky not being a Parasaurolophus is a scene during LBT 4 song "Grandma's lullaby" in which we see some young parasaurolophus. Their crests are larger and form a line with the bridge of their noses. Ducky's crest grows almost from the center of her occiput. Scientifically there is no species with a crest so misplaced, but looking at Ducky's parents (where the crest seems to have undergone a kind of upwards shift) Saurolophus seems to most plausible.
Official sources have claimed Ducky to be a Parasaurolophus or even an Anatosaurus (Anatosaurus had no crest whatsoever!), but I suppose by now we should have grown accustomed to the fact that there is a shortage of dinosaur experts in Universal's office for public information
In Petrie's case the problem is similar (I don't quite agree that his species has been identified beyond any doubts). He, his mother, and his sibilings look more like a crested kind of Pterodactylus, while Pterano is clearly supposed to be a Pteranodon. Again the crests are the causer of confusion.
As for the titles given to the characters, there was clearly somebody fond of alliterations (subsequent words starting out with the same letter or syllable). Generally I have a certain favor for alliterations myself, but I wholeheartedly agree that they sound really enforced here.
They added the "gentle giant" in Spike's case just to have an alliteration where they found none to his s.
At least they spared us a "chomping Chomper" or a "cranky Cera"
Guido too seems to have given them a problem.
As for Littlefoot DarkHououmon, Apatosaurus and Brontosaurus describe the same species. An Apatosaurus sceleton (described previously) was discovered and mistaken for an entirely new species which was named "Brontosaurus". When it turned out that there was no such new species the name "Brontosaurus" was abandoned by the scientists, but had already entered public conscience. At least in this case there is some sense of Paleontology in the offices of Universal's as they are using the scientifically correct name
