It also had teeth, so the scientific name is Odontochelys semitestacea, which any scientist can tell you means Toothed (Odonto) Turtle (Chelys), Half Shelled (semitestacea).
Musicians, on the other hand, understand a chelys to be an kind of ancient Greek lyre, made from a tortoise shell. Chelys is actually a Latin word, borrowed from the Greek kelus. It's not clear to me whether chelys in Latin meant turtle and also lyre, or whether it just meant lyre. (The Latin for turtle, testudo, was also used for lyres.)
So one mangling of Odontochelys semitestacea would be Toothed Lyre with Half a Shell, or just Toothed Half-Lyre. But chelys lyres were made from the carapace, so it's the lyre half of the shell that's missing. A lyre without the lyre is pretty ethereal; thus Ghost Lyre (with Teeth).
This has been another installment of Complicated Answers to Unasked Questions.
Spring comes in time --
Or in dream.
Time comes with the passing of time.
Dream comes when it will.