Original source is "A Triassic plesiosaurian skeleton and bone histology inform on evolution of a unique body plan, Tanja Wintrich, Shoji Hayashi, Alexandra Houssaye, Yasuhisa Nakajima, P. Martin Sander, Science Advances, 13 décembre 2017. DOI : 10.1126/sciadv.1701144" But I don't think you could find it on the net :/
RE: A tick has been found inside a 99 million year old amber; providing evidence that they fed on dinosaur blood!