Chororapithecidae
|
Chororapithecus abyssinicus Temporal range: Miocene |
|
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Primates |
| Superfamily: | Hominoidea |
| Family: | Hominidae |
| Subfamily: | Homininae |
| Tribe: | Gorillini |
| Genus: |
†Chororapithecus Suwa et al., 2007 |
| Binomial name | |
|
Chororapithecus abyssinicus |
|
Chororapithecus is an extinct hominine genus that lived during the Miocene and is represented by one species, Chororapithecus abyssinicus. It is believed to be the earliest known species of the tribe Gorillini. It was originally interpreted as living about 10 to 10.5 million years ago, and its existence was thought to indicate that the last common ancestor between the human/chimpanzee lineage and gorillas may have lived greater than 10 to 11 million years ago, which is at least 2 million years earlier than the previously thought date of divergence of about 8 million years ago. However, a subsequent study by Katoh et al. (2016) dated its fossils to ~8 million years ago.
The only evidence found of this extinct ape is currently nine fossilized teeth of at least three individuals, recovered from the Chorora Formation which runs along the southern Afar Depression of Ethiopia (the same place where the remains of Lucy were discovered in 1974). Analysis of eight molars (two of them fragmented) and a canine tooth show that their structure is partly similar to modern gorillas.
The researchers compared the make-up of the teeth to those of other current and fossil apes, and concluded that the new ape fossils were possibly those of a species of gorilla which ate mostly high-fiber plants, and that the fossil species is likely a 'direct ancestor' of the gorillas currently living in Africa. Alternatively, the idea that the finds are the remains of early hominins has not been ruled out entirely.
Previous efforts to find fossils of great ape ancestors in Africa from between 12 and 8 million years ago had been largely unsuccessful. This absence led some to hypothesize that apes were absent from Africa during this time, and had recolonized Africa from areas in Asia where fossils from this time period are more plentiful. Molecular estimates that humans and gorillas diverged after 8 million years ago were consistent with this idea, in which an adaptive radiation might have occurred after a single species entered Africa and began to adapt to different environments.
...
Wikipedia