1. Pecten lives gregariously on the sea bottom of approximately 20 meters deep. It feeds on microorganisms caught during respiratory water current. It is abundant among eel grass and over mud flats.
2. It is found in India and U.S.A. (Santa Barbara to Cape Sam Lucas, Monterary to the Gulf of California and New Jersey to Labrador).
3. Commonly called as scallop.
4. Animal is enclosed by unequal bivalved shell. Shells are easily recognised by their radiating striations with broad base and two winged ears above.
5. Shell is beautifully sculptured.
6. Hinge line straight and toothless.
7. Animal rests on the right shell, which is white, clean and convex which has a prominent notch, where the anterior wing joins the body of the shell. The left shell is flat dark in colour.
8. Shell valves are thin, light and raised into ridges and grooves, joined by straight, toothless hinge and possess growth lines. The concentric lines follow the curvature of the wavy margins. Umbo is found near hinge.
9. Mantle is tentaculiferous and it enclosed viscera. Hermaphroditic.
Source:
1. Practical Zoology Invertebrates by S.S.Lal. 2. A Manual of Practical Zoology Chordates by Dr. P.S. Verma.
