Thylacoleo Dossier


Common Name Thylacoleo
Group Mammals
Species Thylacoleo furtimorsus
Time Late Pliocene - Late Pleistocene
Diet Carnivore
Temperament Aggressive
PC Release Date Not Yet Released
Tameable Yes
Saddle Yes

Thylacoleo Furtimorsus is a large, powerful marsupial that can often be found hunting around trees. Its long claws and semi-opposable digits make it an apt climber, a quality that Thylacoleo uses to its advantage while hunting. It clambers up trees and waits to ambush passing prey by pouncing upon them. When something that large jumps onto a target, it becomes stunned and doesn't stand much chance.

Thylacoleo's most notable fighting quality is its powerful jaws. Once it bites its prey, it locks its jaw in an iron-strength grip that can hold most smaller creatures in place. Thylacoleo then goes on to savage its prey with its sharp claws. If it needs to escape a fight, Thylacoleo uses its muscular hind legs to jump back to safety among the trees.


Thylacoleo is a moderately strong mount, and its ability to climb trees makes it useful for traversal such that developing tribes often tame it. Small raiding parties particularly favor Thylacoleo, as it is well suited to ambushes and unfair fights!

— The Dossier

The Thylacoleo or Marsupial Lion (Thy-lak-o-lee-oh) is a small carnivorous mammal found on the Ark.

Wikipedia has a more detailed and comprehensive article on Thylacoleo









  • The Thylacoleo was first revealed on September 30, 2015
  • Dossier revealed on December 14, 2015
  • Thylacoleo have the ability to climb trees, which may be a new mechanic that has yet to be implemented.
    • Redwood trees have now been added and creatures such as the Tapejara can latch onto these suggesting a mechanic like this could happen with the Thylacoleo

Trivia not relevant for the game

  • Despite looking like a lion or a very large rodent, Thylacoleo is a marsupial and more closely related to Australian kangaroos and koalas.
  • Thylacoleo means "Pouch Lion" in latin, referring to its nickname as the marsupial (pouch-bearing) lion.
  • Relative to its body weight, Thylacoleo may have had one of the strongest biting forces of any land mammal to ever live.
  • According to the dossier, Thylacoleo will be large enough to ride. This is inaccurate, as real Thylacoleos were only slightly larger than a golden retriever. The size depicted in the dossier is closer to Proborhyaena gigantea, a distant ancestral cousin to Thylacoleo. Thylacoleo, however, was much more agile, and sports a bite force that was, pound for pound, one of the strongest in the animal kingdom, so it's likely not a mistake on the developer's part.







Patch 255 Electrophorus, Microraptor, Ammonite, Thylacoleo, & Tek Structures!-001:34

Patch 255 Electrophorus, Microraptor, Ammonite, Thylacoleo, & Tek Structures!-0

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