UK Ammonite Placenticeras IF-UKA-16-016 Upper Cretaceous as has sometimes been suggested

as has sometimes been suggested

They lived about 152 to 151 million years ago (mya)

It is now common scientific opinion that Seismosaurus hallorum is a species of Diplodocus

The skull of Apatosaurus

Birthworts (also known as pipevine or Dutchman's pipe) are perennial herbaceous plants

UK Ammonite Placenticeras IF-UKA-16-016 Upper Cretaceous as has sometimes been suggestedPlacenticeras meeki Pierre Formation Upper Cretaceous (Campanian) Meade County, South Dakota This example of P. meeki has the original shell with some good red and green iridescence. The shell is thin in some areas and the underlying sutures are visible. The specimen is prepared on its original matrix and is a very good display. The ammonite is 8. 5 inches across. There is a sliver of restoration along the venter (see illustrated photo). The innermost