Pygurus
Pygurus is a genus of sea urchins belonging to the family Clypeidae. Fossil record. This genus is known in the fossil record from the Jurassic (Bajocian age) to Cretaceous Santonian age) (age range: from about 164.7 to 94.3 million years ago). Fossils of species within this genus have been found in Egypt, France, Portugal, Saudi Arabia, Switzerland, Ukraine, the United Arab Emirates, Chile, Germany, India, Madagascar, Poland, Saudi Arabia, Tunisia and United States. Species. Species within this genus include: