Family Isognomonidae - tree oysters

  Order
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  Class
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Bivalvia
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  Environment
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Fresh : No | Brackish : No | Marine : No
  Aquarium
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  First Fossil Record
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  Remark
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Shell compressed, with a straight dorsal margin, slightly inequivalve. Ligament external set in a series of transverse grooves along the dorsal margin. Hinge without teeth. Interior partly nacreous. Only 1 adductor muscle scar, with a well-developed pedal retractor scar. Pallial line without sinus. Sedentary animals, living attached by their byssal threads to various hard substrates, forming often dense colonies in tropical shallow waters. Collected for food by coastal populations. Marketed in Thailand. Used as a substitute of oysters in some areas (Ref. 348).
  Etymology
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  Division
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  Reproductive guild
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  Typical activity level
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  Main Ref
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  Coordinator
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Ref.
[ e.g. 9948]                       
Glossary
                    [ e.g. cephalopods]


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