Ammonites, 5 species Pachycephalosaurus 5 million years

5 million years

They were the smallest teeth of any other related species and it lacked the batteries of teeth found in triceratops showing that it did very little grinding of food with its teeth

This is the largest Ammonite cast available on the web

It likely resembled modern-day New World monkeys and was about the same size as a modern howler monkey

Ammonites, 5 species Pachycephalosaurus 5 million yearsThis wonderful mortality plate has 5 species of ammonites. Placenticeras intercalare 8. 5 inches across Baculites compressus cuneatus Holoscaphites landesi Jeletzkytes brevis Rhaeboceras halli They are from the Upper Cambrian, Fox Hills Formation of South Dakota, USA The largest ammonite, Placenticeras is 8. 5 inches across. This specimen is a composite. It is meant to be a study of species which may be found loose or in the mud balls found along the