Eukarya: Eukaryotic organisms are multicellular and contain a membrane-bound material such as a nucleus and mitochondria (Hickman et al. 2011).

Animalia: Animalia organisms do not possess a cell wall nor are they able to produce energy through photosynthetic processes (Myers 2001).

Mollusca: Mollusks have a soft body covered by a shell made of calcium. They are able to move using their muscular foot (Huber and Blank 2012).

Gastropoda: Gastropods may have a single shell present or no shell at all. Active gastropods have a nervous system of ganglia connected by nerve cords (Huber and Blank 2012).

Stylommatophora: Stylommatophora is characterized as air breathing land snails. These snails have two retractile tentacles holding the eyes (Wikipedia 2012).

Polygyridae: Snails in the Polygyridae family have a single muscle that retracts the eyes and pharynx (Absolute Astronomy 2012). They also no longer possess the love dart (Zipcodezoo 2012).