Anagaudryceras limatum is an extinct genus of ammonites from the Late Cretaceous of Japan. All these ammonites are found in Hokkaido island in Yubari prefecture, Obira or Mikasa.
In Hokkaido's stream you are able to find are heteromorph ammonites, or some other rare cephalopods, sometimes shark teeth or marine reptile bones.
All these fossils are found from paleontologist Gianpaolo Di Silvestro.
 
Gaudryceras limatum
Late Cretaceous
Upper Yezo Group
Ikushubetsu River
Hokkaido Japan