Mostaccioli

Sometimes confused to be another name for Penne, Mostaccioli differs in that it does not have ridges. Mostaccioli is also called Penne Lisce or "smooth penne"

Mostaccioli Riggati is Mostaccioli with ridges. Although Penne is difficult to distinguish from Mostaccioli, originally it was a bit smaller. The differences seem to have disappeared in the U.S., and they are pretty much one and the same.