(Right now the "Previous" and "Next" doesn't maintain serial. We're working to getting it fixed,)

Scientific Name: Nerita undata Linnaeus, 1758
English Name: Waved nerite
Local/Bangla Name: Kalapat shamuk (কালাপ্যাট শামুক)
Classification:
Kingdom: Animalia
Phylum: Mullusca
Class: Gastropoda
Order: Cycloneritida
Family: Neritidae
Description:
The shell is robust, with a short spire, and takes on a somewhat spherical shape with 3-4 whorls that are gently rounded and decorated with spiral cords. These cords are further adorned with numerous fine spiral ridges. The aperture is wide, and it features a thickened columellar callus with two robust teeth in the middle. The outer lip is both thick and extended, with a slightly grooved outer edge. On the inner side, there are 13-17 well-defined, elongated, sturdy teeth, with the first and second teeth toward the rear being broader and having a club-like shape.
Habitat & Distribution in Bangladesh:
St. Martin’s and Sonadia Island and the Sundarbans
Environment:
Marine
Main References:

Siddiqui KU, Islam MA, Kabir SMH, Ahmad M, Ahmed ATA, Rahman AKA, Haque EU, Ahmed ZU, Begum ZNT, Hassan MA, Khondker M, Rahman MM (2007) Encyclopedia of Flora and Fauna of Bangladesh, Vol. 17. Molluscs. Asiatic Society of Bangladesh, Dhaka 415 pp.

Other References:
DNA Barcodes from Bangladesh
GenBank Accession Number:
Other DNA Barcodes & Nucleutide Sequences
Other Information