Interesting. That page says “few vertebrae”, but the image makes it look to me like a full set.

On the other hand, if I found an animal with no ribs and pelvis and only the rudimentary limbs typically found in fish, I’d tend to say that the skeleton was missing. Or at least, ahem, skeletal.

Thanks. My first impression was that there was some funny business, but then I found what I thought was a decent article.