Cindy Howells, Amgueddfa Cymru National Museum of Wales paleontology curator, said the creature was most probably 75 centimeters tall and 2.5 meters long.
The B.1.351 variant first detected in South Africa and identified in the United States this week could drive the country's Covid-19 death toll up to 654,000 by May 1.
Data from Novavax's clinical trial showed that its vaccine is only 49% effective against the South African variant, raising concerns about SARS-CoV-2's resistance.