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Scientific Name: Atrina vexillum (Born, 1778)
English Name: Flag pen shell/Indo Pacific pen shell
Local/Bangla Name: Kostura (কস্তুরা)
Photo: GBIF
Classification:
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Ostreida
Family: Pinnidae
Description:
The shell is very large and triangular to hatchet-shaped. It is semi-translucent, thick, solid, and inflated. The dorsal margin is nearly straight, the posterior margin is broadly oval to truncate in outline, and the ventral margin is convex posteriorly and concave near the umbones. The exterior of the shell has 10 to 17 main radial ribs, often bearing scale-like spines and weaker interstitial riblets. The interior nacreous layer is strong, undivided, and occupies the anterior half of the valves. The hind margin of the posterior adductor scar slightly protrudes beyond the nacreous area. The color of the exterior is dark reddish-brown to nearly black, usually dull. The interior is dark brown to black, and the nacreous area is iridescent.
Habitat & Distribution in Bangladesh:
Sonadia island and Cox’s Bazar area
Environment:
Marine, Benthic, Tropical
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.
DNA Barcodes from Bangladesh
GenBank Accession Number:
Other DNA Barcodes & Nucleutide Sequences
IUCN conservation status:
Other Information
