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Scientific Name: Indoplanorbis exustus (Deshayes, 1833)
English Name: Ram’s Horn snail
Local/Bangla Name: চেপ্টা প্যাঁচানো শামুক( Chapta pechano samuk)
Photo: flickr
Classification:
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Basommatophora
Family: Bulinidae
Description:
The shell is moderately large and thick, displaying a sinistral, depressed coil with three rounded whorls. The apex is sunken, and the last whorl is notably large, rounded at the periphery. The suture is deeply impressed, and the aperture is ear-shaped. The foot is relatively broad, short, and leaf-shaped, with a lobed posteriorly pointed branchial process. In newly hatched offspring, the width is initially greater than the length, but within 7 to 10 days, the width and length become equal. After about 20 days, the width surpasses the length again, and around 30 days later, the length becomes half of the width. The exterior color is golden with creamy spiral bands, transitioning from golden to greenish from the aperture to the apex. On average, the shell measures 16 mm in length, 8 mm in width, with an aperture length of 4 mm and an aperture width of 6 mm.
Habitat & Distribution in Bangladesh:
Commonly found in stagnant waters throughout Bangladesh; abundant in ponds, ditches, canals and paddy fields. Can successfully colonise at ease on the muddy substratum in transient freshwater habitats, since it has broad physiological and ecological requirements. Common to freshwater bodies of Bangladesh.
Environment:
freshwater