Complex sentence: Odostomiinae, "Odostomia" snails and their allies, is a taxonomic subfamly of minute parasitic sea snails, marine heterobranch gastropod mollusks, or micromollusks, in the family Pyramidellidae.
Split into simpler sentences: Odostomiinae, "Odostomia" snails and their allies, is a taxonomic subfamly of minute parasitic sea snails. These are marine heterobranch gastropod mollusks, or micromollusks, in the family Pyramidellidae.