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Scientific Name: Racesina luteola (Lamarck, 1822)
Synonym: Lymanea luteola (Currently unaccepted)
English Name: Lymneid snail
Local/Bangla Name: শামুক (Shamuk)
Photo: Maxim Vinarski
Classification:
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Basommatophora
Family: Lymnaeidae
Description:
A small aquatic mollusk characterized by a circular foot. The shell is ovate and not highly pointed, with a distinct, conical spire that is not prominently pointed. The body whorl is significantly inflated and slightly compressed, featuring a large aperture that is ovate and moderately expanded. The shell is dextral, and its outer lip is nearly straight, lacking an operculum. The head bears a pair of flattened, non-invaginable triangular tentacles with eyes located at the base. The radula has a central tooth that is unicuspid. There are 4-5 whorls in the shell. The exterior color is typically dark greenish, occasionally appearing reddish, while the aperture is blackish-white. On average, the shell measures 19 mm in length, 10 mm in width, with an aperture length of 13 mm and an aperture width of 7 mm. When parasitized by larval trematodes, Lymnaea spp. tends to increase in size.
Habitat & Distribution in Bangladesh:
Generally occurs in the littoral regions of shallow water bodies like ponds, ditches, stagnant and temporary water bodies abundant with aquatic vegetation. Also occurs in shady places under large trees on the shore. Common all over Bangladesh; widely distributed in all low lands.
Environment:
freshwater