Mauler

The Mauler is a new strain of Chimera, but has never been seen in-game. The only hint of it's existence is on resistance-game.com.

The Mauler is described as very large, usually being used to carry equipment for the Chimera, but is able to shoot super-heated saliva, similar to Napalm. It can also cough up a pod which shoots out sticky tendril appendages. These tendrils can infect anything they touch.

Mauler, not Marauder
The above characteristics of the Mauler are remarkably similar to the Chimeran Marauder. However, in-game, the word "Marauder" is used, whereas the website describes a Mauler. Hense, unless there has been some sort of spelling error in the website, these two Chimera cannot possibly be the same creature.

The Mauler is described here.