Shells consisting of one valve only; also mollusks whose shells are composed of a single piece, as the snails and conchs.
Univalves typically move by using a muscular foot to glide over surfaces, leaving a mucous trail behind. Some univalves may also use their foot to burrow into sediment or attach themselves to a hard surface.
Univalves, or gastropods, typically reproduce sexually, with most species having distinct male and female individuals. During mating, the male transfers sperm to the female, which can store it for later fertilization of eggs. Some univalves are also capable of asexual reproduction through processes like parthenogenesis, where females produce eggs that develop without fertilization. After fertilization, the eggs are usually laid in protective capsules or masses, depending on the species.
Univalves generally reproduce sexually, with individuals possessing both male and female reproductive organs. They can also reproduce asexually through fragmentation or budding in some species.
A molluscum contagiosum (MC), sometimes called a water wart, is a viral infection of the skin that can be spread by contact, to other areas or to other people. The virus does not have a dormant stage.
Univalves, otherwise known as gastropods, live in most all oceans. A sea mollusk is a good example of a univalve.
Univalves
The edible univalves belong to the class Gastropoda. This class includes snails, slugs, and whelks, which are all mollusks with a single shell.
Univalves typically move by using a muscular foot to glide over surfaces, leaving a mucous trail behind. Some univalves may also use their foot to burrow into sediment or attach themselves to a hard surface.
Univalves, or gastropods, typically reproduce sexually, with most species having distinct male and female individuals. During mating, the male transfers sperm to the female, which can store it for later fertilization of eggs. Some univalves are also capable of asexual reproduction through processes like parthenogenesis, where females produce eggs that develop without fertilization. After fertilization, the eggs are usually laid in protective capsules or masses, depending on the species.
Bivalves, univalves, and cephalopods are all types of mollusks. So are gastropods.
Valve refers to a shell, so a bivalve possesses two shells, which are usually hinged together and more or less cover the animal (Class Bivalvia), while univalves have only one shell, and typically leave the muscular foot exposed, unless the animal is capable of withdrawing into its shell (Class Gastropoda).
Gastropods: snails. Gastro means something like 'stomach' or 'belly' and 'pod' means 'foot'. Cephalopods: octopusi. Cephalo means something like 'head'. Bivalves are molluscs with two clasping shells like a clam and univalves have only one.
There is no such animal as a "univalve", however "bivalves" are filter feeders and filter seawater through their gills to pick up trace amounts of food.
Some examples of univalves are snails and slugs.
The class Gastropoda or gastropods (also previously known as univalves and sometimes also spelled Gasteropoda) are members of the phylum Mollusca and are more commonly known as "snails and slugs".
Every mollusk except slugs, which have evolved to not need a shell, has a shell. Snails, clams and other bivalves have an external shell. Octopi, squid and cuttlefish have an internal shell.