Lymnaeidae


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Lymnaeidae

 

a family of gastropods. The shell, which is spirally coiled and relatively high (in the common freshwater snail, up to 7 cm), usually has a large opening. The eyes are located at the base of the tentacles. The organ of respiration is a lung, which in some species fills with water and functions as a gill. Lymnaeidae are hermaphrodites. Fertilized ova are deposited in the form of mucoid ribbons.

Lymnaeids feed on algae, animals, plant remains, and the tissues of higher plants. They usually inhabit fresh waters and are only rarely encountered in saltwater lakes and the coastal zones of brackish inland seas (for example, the Baltic Sea). There are about 120 species of lymnaeids. The USSR has more than 30 species, united in eight or nine subgenera of the genus Lymnaea. (The subgenera are often considered separate genera.) Almost all lymnaeids are intermediate hosts of worms that are parasites of man and of domestic and wild animals. For example, Lymnaea truncatula transmits the causative agents of fascioliasis of cattle.

References in periodicals archive ?
For stable-isotope-analysis, we collected adult Belostoma (n = 9 individuals), cave mollies (Poecilia mexicana; n = 5 individuals), dipteran larvae (n = 3 pooled samples of multiple individuals of Goeldichimnomus fulvipilus), snails (n = 1 pooled sample of multiple individuals of a Lymnaeidae species), and bacterial mats (n = 1).
The miracidia then penetrate, and further develop in, snails of the family Lymnaeidae.
All the ganglia are arranged in a pentaganglionate visceral loop that is similar to those identified in Scissurellidae (Vetigastropoda), Viviparidae (Architanenioglossa), Cerithiidae (Caenogastropoda), Cingulopsidae (Caenogastropoda), Mathildidae (Allogastropoda), Pyramidellidae (Allogastropoda), Acteonidae (Opisthobrachia), Philinidae (Opisthobrachia), Chilinidae (Basommatophora), and Lymnaeidae (Basommatophora) (Haszprunar 1988).
Fascioloides magna has an indirect life cycle, requiring aquatic snails in the family Lymnaeidae (hereafter lymnaeid snails) to serve as intermediate hosts (Pybus 2001).
La enfermedad esta supeditada a la presencia de huespedes intermediarios, caracoles pulmonados de la familia Lymnaeidae, cuyas poblaciones prosperan en ambientes acuaticos.
The disease is dependent on the presence of intermediate hosts, snails belonging to Lymnaeidae family, which populations thrive in aquatic environments.
In the absence of a thorough generic revision of the Lymnaeidae, we tentatively refer here to L.
Bridging gaps in the molecular phylogeny of the Lymnaeidae (Gastropoda.
The pulmonates (Ancylidae, Lymnaeidae, Physidae, and Planorbidae) are more resistant to organic pollution.