Vorticela or Vorticella: How To spell?

The word Vorticela is misspelled against Vorticella, a noun meaning "Any one of numerous species of ciliated Infusoria belonging to Vorticella and many other genera of the family Vorticellidae. They have a more or less bell-shaped body with a circle of vibrating cilia around the oral disk. Most of the species have slender, contractile stems, either simple or branched."