User blog comment:Kogath/Monster Hunter X Discussion/@comment-26261665-20151013195316/@comment-26450094-20151014152726

^This is Lagiacrus ancestor. The other one is just other Piscine Wyvern. And they are actually Piscines. Not all the Psicines have to be similar to Plesioth. It is like Tigrex for FW or Gobul for the Leviathans,being in the same classification doesn't mean they all have to have the same skeleton.