Kingdom Animalia: Multicellular and heterotrophic (rely on ingestion to acquire their nutrients) and also lack cell walls.

Phylum Mollusca: Comprised of coelomates that are soft-bodied and are divided into three main body parts: the head (with the exception of the bivalves), a muscular foot, and a visceral mass. Most members also possess a toothed-tongue called a radula.

Class Gastropoda: this class includes such animals as snails, slugs, and limpets. Most of the members of this class have a single shell that is coiled.

Subclass Pulmonata: This includes the freshwater snails and slugs. Members acquire oxygen by the use of a "lung" or pulmonary cavity, unlike other members of the class Gastropoda.

Order Basommatophora: Members have a single pair of tentacles, with the eyes located at the base.

Family Planorbidae: Thise family is comprised of the freshwater Pulmonates, the largest family as far as the number of genera and species are concerned.

Genus Helisoma: This genus is composed of many types of Ramshorn snails, including the common Ramshorn snail found prevalently in aquatic environments across North America and Canada.

Species: H. trivolvis: Ramshorn snail




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