
A number of important fossil discoveries were made over the course of 2022, including the emergence of a new fossil site in Morocco. The site is located in the Taichoute desert, formerly an undersea environment. The unique location allowed researchers to uncover fragments of a giant arthropod species that flourished about 470 million years ago.
Early estimates suggest the species, a predecessor to modern shrimp and insects, might have grown up to 6.5 feet in length. Researchers said it would take some time to fully analyze the fossils, and that some remains may represent previously described species. The researchers believe the region’s arthropods were influential players in the surrounding ecosystem.
The Taichoute site is considered part of the larger Fezouata Biota fossil region. Still, the site features a completely different fossil record compared to Fezouata Shale just 50 miles away. In 2022, Fezouata Shale was recognized as one of the 100 most important geological sites on earth, mainly because of the unique insight provided into the Early Ordovician period, when these giant arthropods swam the seas.
Other discoveries presented challenges to preexisting concepts, such as the discovery of a true giant wombat in Australia. For many years, the diprotodon has been colloquially referred to as the giant wombat, though in reality the two species are only distantly related. Modern wombats are about 3.3 feet in length and weigh from 55 to 88 pounds, while the diprotodon was about the size of a car.
In 2022, researchers discovered the complete skull of a true giant wombat species from approximately 80,000 years ago. The skull, found in a Queensland cave system, belonged to an individual of the family vombatidae, a far rarer discovery than the diprotodon. The true giant wombat’s skull, named Ramsayia, was about twice the size of a modern wombat and structured in such a way that indicates strong chewing muscles.
Discussing the family as a whole, associate professor Julien Louys of the Australian Research Centre for Human Evolution said that vombatidae first developed a large body, then adopted an array of specialties depending on local grasses. Ramsayia’s skull is the first wombat skull to feature a complex cranial sinus system.
Finally, the analysis of an extinct lemur fossil revealed unexpected clues to the development of early humans. A study headed by the Sir John Walsh Research Institute’s Dr. Ian Towle centered on an atypically large monkey lemur fossil, archaeolemur, which demonstrated unusual anatomical features of the teeth. For example, the fossil did not include a tooth comb modern lemurs use for grooming purposes.
Dr. Towle said the lack of the front mouth tooth comb is one of several ways that these lemurs resemble monkeys, apes, and humans. The study, which appeared in the American Journal of Biological Anthropology, involved the analysis of nearly 450 archaeolemur teeth, as compared to a variety of primate teeth. Researchers were surprised to find the lemur’s teeth to have a shape similar to baboon teeth, along with tooth chipping patterns comparable to Neanderthals. The pattern, not seen in any modern primate, is often associated with the use of tools, a fact researchers will need to reassess in light of the archaeolemur discovery.








