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These small snails, like all the species in the family Physidae, have shells that are sinistral, which means that when the shell is held with the spire pointing up and the aperture facing the viewer, then the aperture is on the left-hand side. The shells of Physa species have a long and large aperture, a pointed spire, and no operculum. The ...
Drawing of the animal and shell of Viviparus viviparus; a) head b) tentacles c) eyes d) foot e) operculum. The height of the shell is 25–35 mm. The width of the shell is 20–26 mm. Males are 2 mm smaller than females of the same age. The shell colour is dark greenish brown or greyish yellow, with three reddish brown spiral bands.
Conus granarius is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails, cone shells or cones. [1] These snails are predatory and venomous. They are capable of "stinging" humans.
Janthina globosa, commonly referred to as the violet snail, is a neustonic organism characterized by its thin, fragile purple shell and large size The maximum recorded shell length is 38.5 mm. [2] Females normally grow to larger sizes than males, making it easy to distinguish between the sexes.
The Columbellidae, the dove snails or dove shells, are a family of small sea snails, marine gastropod mollusks in the order Neogastropoda. [2] [3]Pardalinops testudinaria. These snails are characterized by their elongated, spiral shells and their carnivorous feeding habits.
Physa fontinalis, common name the common bladder snail, is a species of air-breathing freshwater snail, an aquatic gastropod mollusc in the family Physidae. The shells of species in the genus Physa are left-handed or sinistral .
The Buccinidae are a very large and diverse taxonomic family of large sea snails, often known as whelks or true whelks. [ 1 ] [ 2 ] The family includes more than 1500 species.