dextral shell in a sentence

1. Most gastropod species, and especially the marine species, have a dextral shell.
2. Indeed, formerly planorbids were thought to have dextral shells, and so species of this family were figured as if they had dextral shells.
3. Indeed, formerly planorbids were thought to have dextral shells, and so species of this family were figured as if they had dextral shells.
4. If a coiled gastropod shell is held with the spire pointing upwards and the aperture more or less facing the observer, a dextral shell will have the aperture on the right-hand side, and a sinistral shell will have the aperture on the left-hand side.
5. It's difficult to find dextral shell in a sentence.