A snail is a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name snail is also used for most of the members of the molluscan class Gastropoda that have a coiled shell that is large enough for the animal to retract completely into. When the word "snail" is used in this most general sense, it includes not just land snails but also numerous species of sea snails and freshwater snails. Gastropods that naturally lack a shell, or have only an internal shell, are mostly called slugs, and land snails that have only a very small shell are often called semi-slugs.
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell.
Eremarionta is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Helminthoglyptidae.
Helminthoglypta allynsmithi, the Merced Canyon shoulderband or Allyn Smith's banded snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Helminthoglyptidae. This species is endemic to the United States.
Helminthoglypta is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Helminthoglyptinae of the family Xanthonychidae.
The Kern shoulderband, scientific name Helminthoglypta callistoderma, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helminthoglyptidae. This species is endemic to the United States.
The mesa shoulderband, scientific name Helminthoglypta coelata, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helminthoglyptidae. This species is endemic to the United States and Baja California del Norte, Mexico.
The Victorville shoulderband is a species of land snail in the family Helminthoglyptidae.
A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. Land snail is the common name for terrestrial gastropod mollusks that have shells. However, it is not always easy to say which species are terrestrial, because some are more or less amphibious between land and fresh water, and others are relatively amphibious between land and salt water.
The Helminthoglyptinae are a subfamily of air-breathing land snails, terrestrial pulmonate gastropod mollusks within the family Xanthonychidae.
Helminthoglypta tudiculata, common names the southern California shoulderband or southern shoulderband, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helminthoglyptidae.
Freshwater snails are gastropod mollusks that live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs to major rivers. The great majority of freshwater gastropods have a shell, with very few exceptions. Some groups of snails that live in freshwater respire using gills, whereas other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung. Most feed on algae, but many are detritivores and some are filter feeders.
The Guadalupe-Nipomo Dunes National Wildlife Refuge is a 2,553-acre (10.33 km2) protected area located along the Central Coast of California, in southern San Luis Obispo and northern Santa Barbara Counties.
Megalonaias is a genus of bivalves belonging to the family Unionidae.
Helminthoglypta sequoicola, the redwood shoulderband snail, is a North American species of air-breathing land snail. Two subspecies are recognized:
Helminthoglypta diabloensis, or the silky shoulderband snail, is a North American species of air-breathing land snail. It is found in California, including the California Coast Ranges, Diablo Range, and other areas in Alameda, Contra Costa, Santa Clara, Yolo, Colusa and Napa Counties. The shell of H. diabloensis is described as having six to seven tightly coiled whorls.
