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In the present day of this alternate timeline, much of the predatory theropods are feathery and don't seem very intimidating. However, there is one group of non-coelurosaur theropods that have survived to the present day in this alternate timeline. These are the monster-like abelisaurs.
The abelisaurs are the only members of the ancient ceratosaur group left in this alternate timeline. The ceratosaurs first evolved in the Early Jurassic from small Coelophysis-like ancestors about 185 MYA. However, the abelisaurs didn't evolve until 11 million years later in the Middle Jurassic. During the Cretaceous, they diversified in the Southern Hemisphere but went extinct in the Northern Hemisphere due to competition from tyrannosaurs and dromaeosaurs.
In our timeline, the abelisaurs went extinct at the end of the Cretaceous due to the K-Pg extinction. However, in this alternate timeline, the Tithonian-Berriasian glaciation gave the abelisaurs time to adapt to colder climates and they were able to survive the mass extinction. They flourished in the majority of the southern hemisphere during the Paleogene.
Unfortunately, during the Neogene, the abelisaurs went into major decline. They died out in Antarctica and Australia due to climate change. They died out in South America and India due to competition from dromaeosaurs and tyrannosaurs. They were nearly wiped out in the early Pliocene due to the evolution of gigaraptors. However, they were able to survive by getting smaller and filling new niches. During the late Pliocene, they were also able to island-hop to Southern Europe.
Jackalbulls (Family: Recordidae)Edit
The jackalbulls get their name because many species have horns for intimidation similar to a Carnotaurus but are also scavengers, having a niche similar to jackals on the African savannah. The ancestors of the jackalbulls were once very successful apex predators on the African savannahs since carnosaurs were scarce during the Neogene. Sadly, at the end of the Pliocene, the Gigaraptors evolved from the African dromaeosaurs and didn't only wipe out the carnosaurs, but also most of the abelisaurs. As a result, the jackalbulls (execpt for those in the Sahara) were forced to evolve into scavengers. However, very late in the Pliocene, one species of jackalbull managed to migrate across the Middle East, into southern Europe.
- False Carnotaurus (Recordus carnotauros)
- Saharan Jackalbull (Recordus saharicus)
- Atlas Jackalbull (Recordus atlas)
- European Jackalbull (Recordus europaeus)
- Western Jackalbull (Recordus occidentalis)
- Arabian Jackalbull (Recordus aravikos)
- Persian Jackalbull (Recordus persica)
- Congolese Jackalbull (Recordus congo)
Jungle Beasts (Family: Immanidae)Edit
While the jackalbulls are the dominant group of abelisaurs in Europe and the African mainland, a different group lives in Madagascar. These are known as the jungle beasts. Unlike their jackalbull relatives, jungle beasts are massive, growing about the same size as a Tarbosaurus. They most likely evolved from the more primitive Cretaceous abelisaurs during the Eocene.
- Common Jungle Beast (Immanis immanis)
- Pygmy Jungle Beast (Immanis pygmaeo)
- Savannah Beast (Immanis tropikos)
|Sauropsida||Archosauria||Theropoda||Abelisauroidea • Aves • Dromaeosauridae • Gigaraptornae (Dinosaurs of the Ice Age) • Ornithomimosauria • Therizinosauria • Tyrannosauroidea|
|Ornithischia||Ankylosauria • Ceratopsia • Ornithopoda|
|Lepidosauromorpha||Plesiosauria • Squamata|
|Mammalia||Eutheria • Metatheria • Monotremata|