Ryosuke Motani

Researchers Describe New Reptile Platypus From the Early Triassic

January 24, 2019
No animal alive today looks quite like a duck-billed platypus, a semi-aquatic, egg-laying mammal hailing from eastern Australia. 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. The newly discovered marine reptile Eretmorhipis carrolldongi from the lower Triassic period is described in the journal Scientific Reports Jan. 24. 

Why Whales? What Sends Land Animals Back to Sea

April 20, 2018
What drives species to move into such a different habitat? Two paleontologists at UC Davis, Geerat Vermeij and Ryosuke Motani, set out to test these ideas by compiling a list of all the groups of mammals, birds, reptiles and amphibians that have re-occupied marine environments and comparing their time of return to the ocean with known mass-extinction events.