The formal classification of the land snail, Allogona profunda (Say), is as follows:
Domain: Eukarya
Kingdom: Animal
Phylum: Mollusca
Class: Gastropoda
Order: Pulmonata
Suborder: Stylommatophora
Family: Polygyridae
Genus: Allogona
Species: Allogona profunda
Allogona profunda (Say) consists of the genus and species name as well as the name of the authority followed in parentheses. In this case, the man who named this snail is Thomas Say, who is an early American conchologist. Initially he placed this snail in the genus classification of Helix, but later students placed it in the genus Allogona after examining the snail’s internal anatomy. Zoologists place the name of the authority in parentheses if the currently accepted generic name is different from the original name given to the snail (Leonard, 1959).
All of the snails of the genus Allogona are united by a few common characteristics. The shells of each of the species are umbilicate, have a reflected white peristome, and no more than a single, low blunt, tooth. They also have some similarities between their soft anatomies (Leonard, 1959).
This snail is also part of the family Polygyridae and is united to this family by common anatomical and physiological attributes. Shells are of little value when classifying families, but all polygyrids have lense-shaped to globose shells with a reflected lip on the peristome (Leonard, 1959).
The order to which Allogona profunda (Say) belongs is Pulmonata. This order consists of snails that have a chamber in the mantle that serves as a lung. The snails that developed this chamber for breathing air can also be divided into two more groups, one that has sessile eyes and the other that has eyes borne on stalklike appendages. The group Basommatophora is the group with sessile eyes and the group Stylommatophora is the one with stalked eyes. In this case, Allogona profunda (Say) is part of the suborder Stylommatophora (Leonard, 1959).
This snail is also placed in the class Gastropoda. In Latin, Gastropoda literally translated means “stomach-foot”. It is a member of this class because Allogona profunda (Say) uses a broad creeping foot for locomotion and another feature that connects this snail to this class is that snails in this class usually have a single, generally spiraled shell. Also, all animals in the class Gastropoda possess a mantle that secretes a shell, and a modified foot (Leonard, 1959).
Gastropoda is one of five classes in the phylum Mollusca.
Additionally, Allogona profunda (Say) is an animal, so it is placed in the Animal Kingdom, which distinguishes it from plants and bacteria (Leonard, 1959).
Lastly, this snail is in the domain Eurkarya. Characteristics that unite this snail to this domain are that it is multi-cellular and each cell has many organelles. Also the snails are much larger than any prokaryotes that are in the domains Archaea and Bacteria.