Palaeontologists have uncovered proof of a remarkably wealthy marine ecosystem that existed in what’s now Egypt’s desert hundreds of thousands of years in the past, figuring out enamel from seven shark species in rocks shaped from an historical seabed. The fossils had been discovered on the Abu-Tartur Plateau in Egypt’s Western Desert, inside the phosphate-rich Duwi Formation. The realm was as soon as a part of a shallow sea that lined giant elements of northern Africa through the Cretaceous interval, between about 145 million and 66 million years in the past.
The examine, led by palaeontologist Tarek Yassin of Cairo College, was revealed within the journal Cretaceous Analysis underneath the title describing the shark assemblage from the Duwi Formation at Abu-Tartur.
Researchers examined 14 beforehand unreported shark enamel and recognized 5 species that had not been recorded from Abu-Tartur earlier than: Cretalamna cf. maroccana, Scapanorhynchus cf. raphiodon, Serratolamna cf. serrata, Squalicorax bassanii and Squalicorax pristodontus. Two of them, Serratolamna cf. serrata and Squalicorax bassanii, are additionally new data for Egypt.
One discovery was significantly important. The needle-like enamel of Scapanorhynchus cf. raphiodon might signify the primary identified incidence of the species in Africa and might be its youngest identified fossil report, in response to the researchers.
The findings level to a extremely productive marine setting, possible fuelled by ocean upwelling that introduced nutrient-rich deep water towards the floor. This is able to have supported plankton, fish and invertebrates, making a meals internet able to sustaining a number of giant shark predators.
“The presence of Squalicorax may counsel an enter from nearshore/internal shelf settings, whereas the incidence of Scapanorhynchus displays deeper-water situations on the outer shelf and slope,” the researchers wrote.
