크기 : 23*22*11
품명 : 암모나이트(Ammonite)
원명 : Audoliceras sp. (Uncoiled Ammonite)
시대 : Cretaceous Aptian Stage (~120 million years ago)
산지 : 러시아(Volga River Region, Saratov, Russia)
내용 : 이런 규모의 크기로 거의 완벽에 가까운 화석을 본다는 자체가 우리를 즐겁게 해주는 작품입니다. 특히 암모나이트중 이런 풀린종류는 흔하지 않을뿐더러 표면 상태도 비할곳이 없는 수작입니다.

This is an ammonite of the genus Audoliceras coming from Cretaceous, Aptian Stage (120 m.y.a) deposits of Russia. It has what is known as heteromorph shape. While most ammonites have spiral shells that retain the same shape throughout growth (homomorph), a major group of ammonites, the Ancyloceratina, emerged during the Late Jurassic that had uncoiled shells; they were named heteromorphs, meaning different-shaped. While little is known of their mode of life, their uncoiled shells would have hindered fast swimming. They may have wobbled their way through the water column without spread tentacles, grapping whatever prey came within their reach. As with all other ammonites, the heteromorphs went extinct at the end of the Cretaceous.