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Shells of the freshwater snail Theodoxus danubialis Shells of the land snail species Helicina rostrata Titiscania, a shellless neritimorph. Despite their relatively low diversity, with only around 2,000 species, neritomorphs have achieved a remarkable diversity of forms, resembling a smaller-scale version of the diversity achieved by Gastropoda as a whole. [3]
Freshwater snails are gastropod mollusks that live in fresh water. There are many different families. 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.
Bulinus truncatus is a species of air-breathing freshwater snail with a sinistral shell, an aquatic pulmonate gastropod mollusk in the subfamily Bulininae of the family Bulinidae, the ram's horn snails and the like. [3] Subspecies. Bulinus truncatus contortus (Michaud, 1829) (synonym: Physa contorta Michaud, 1829) Bulinus truncatus rivularis ...
Neritidae, common name the nerites, is a taxonomic family of small to medium-sized saltwater and freshwater snails which have a gill and a distinctive operculum. [2] The family Neritidae includes marine genera such as Nerita, marine and freshwater genera such as Neritina, and freshwater and brackish water genera such as Theodoxus.
Natural populations of these snails are usually found in tropical standing water or freshwater in South America and Africa, but they also reach 30° latitude in subtropical areas. Many species of these red-blooded planorbid snails (Gastropoda: Basommatophora) are able to survive a long time when removed from their freshwater habitat.
Pleuroceridae, common name pleurocerids, is a family of small to medium-sized freshwater snails, aquatic gilled gastropod mollusks in the superfamily Cerithioidea.These snails have an operculum and typically a robust high-spired shell. Reproduction is iteroparous, and juvenile snails emerge from eggs laid on a firm surface by a gonochoristic ...
These freshwater limpets are capable of secreting a bioluminescent substance when disturbed. [6] Theories vary as to the purpose of the bioluminescence, but indicate it is a defence mechanism. One theory is that when disturbed by a predator, Latia release the bioluminescent slime, and the predator chases the light rather than the snail.
Bithyniidae is a family of small freshwater snails with an operculum, aquatic gastropod molluscs in the clade Littorinimorpha. [2] Their minute shell is often colored. They are characterized by a calcareous operculum, a lobe on the upper surface of the neck. The ctenidium, the respiratory gill-comb, is very broad. They have a ciliary feeding habit.