Sextellegers

The Sextelleger is easily one of the most dangerous plant-animals of Mars. Looking like a cross between a rhinoceros and a dinosaur, these things are truely dangerous, as they attack at once and boast with high speed, armour and very sharp teeth that cause lots of damage. They also have lots of endurance to boot.

One should think twice before attacking this monster, which is found in the wilderness of Mars.

Lore
''Here is another Martian plantimal with no Earthly equivalent. No other creature encountered by Lowell and the others was considered more dangerous or more malevolent. Even the planther thinks twice before attacking a fully-grown sextelleger. The six-legged beast can only be described as a carnivorous rhinoceros. A lone sextelleger is a menace, but one seldom encounters a lone sextelleger -- the creatures travel in herds, killing and devouring anything and everything in their paths.''

- from "Mysteries of the Red Planet", Martian Dreams