Complex sentence: There are two known types of "Ceratosaurus" teeth: one with longitudinal ridges and the other with smooth enamel both types of teeth have crowns with a teardrop-shaped cross section and carinae runing up the middle.
Split into simpler sentences: There are two known types of "Ceratosaurus" teeth: one with longitudinal ridges and the other with smooth enamel. Both types of teeth have crowns with a teardrop-shaped cross section and carinae runing up the middle.