DIFFERENCE BETWEEN BRACHIOPODA AND BIVALVES

DIFFERENCE BETWEEN BRACHIOPODA AND BIVALVES

 

Brachiopods have two valves which are different when seen from the side of the animal. The valves are symmetrical. The bivalves have two valves which are mirror images of each other from the side. The valves are symmetrical. Both Brachiopod and bivalves (Mollusca) have two major muscles within the shell to keep closed. They have which are called “adductor muscles”. The muscles contract to keep the two valves.

BRACHIOPODS	BIVALVES
Valves are unequal.	Valves are equal
Valves are equilateral	Valves generally inequilateral.
Bilateral symmetry plane passing across the two valves.	Bilateral symmetry plane passing in between the two valves.
Two valves joined	Two valves joined along dorsal margin.
Inarticulates have no teeth; Articulates have teeth.	Teeth present in most of the cases. Each valves bears both teeth and socket.
No ligament, muscle controls in the opening and closing of valves.	Valves are opened by ligament and closed by muscles.
Brachiopoda is marine invertebrate that belongs to phylum Brachiopoda	Bivalve is an invertebrate that belongs to phylum Mollusca
Only Marine	Marine and Fresh water

-         M.MOHAMED IBRAHIM AZHAR

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