The fossil provides more evidence of rapid evolution occurring during the early Triassic, Motani said.Ĭo-authors on the study are Long Cheng and Chun-bo Yan, Wuhan Centre of China Geological Survey, Wuhan Da-yong Jiang, Peking University Andrea Tintori, Università degli Studi di Milano, Italy and Olivier Rieppel, The Field Museum, Chicago. Related to the dolphinlike ichthyosaurs, Eretmorhipis evolved in a world devastated by the mass extinction event at the end of the Permian era. “It wouldn’t survive in the modern world, but it didn’t have any rivals at the time,” he said. Its long, bony body means that Eretmorhipis was probably a poor swimmer, Motani said. There are no fossils to show what Eretmorhipis ate, but it likely fed on shrimp, worms and other small invertebrates, Motani said. Eretmorhipis fossils were found at what were deeper holes, or lagoons, in the platform. In the early Triassic, the area was covered by a shallow sea, about a meter deep, over a carbonate platform extending for hundreds of miles. In the platypus, the bill is filled with receptors that allow it to hunt by touch in muddy streams. Like the modern platypus, there is a large hole in the bones in the middle of the bill. The two new fossils show the animal’s skull had bones that would have supported a bill of cartilage.
![platypus evolution records platypus evolution records](https://media.australian.museum/media/dd/images/Platypus_skeleton.width-1600.c10bcd2.jpg)
“When I started thinking about the biology I was really puzzled.” Hunting by touch “This is a very strange animal,” Motani said. Bony plates ran down the animal’s back.Įretmorhipis was previously known only from partial fossils without a head, said Professor Ryosuke Motani, a paleontologist at the University of California, Davis, Department of Earth and Planetary Sciences and co-author on the paper. 24.Īpart from its platypus-like bill, Eretmorhipis was about 70 centimeters long with a long, rigid body, small head and tiny eyes, and four flippers for swimming and steering. The newly discovered marine reptile Eretmorhipis carrolldongi from the lower Triassic period is described in the journal Scientific Reports Jan. But about 250 million years ago, something very similar swam the shallow seas in what is now China, finding prey by touch with a cartilaginous bill. No animal alive today looks quite like a duck-billed platypus, a semi-aquatic, egg-laying mammal hailing from eastern Australia. Robert Arneson: Serious Ideas Behind that Humor.Graduate School of Management Events Calendar.College of Letters and Science Events Calendar.College of Biological Sciences Events Calendar.College of Agricultural and Environmental Studies.Commencement Schedule and Graduation Celebrations.
![platypus evolution records platypus evolution records](https://media.australian.museum/media/dd/images/Some_image.width-1600.e5ce833.jpg)