Tridacnidae


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Tridacnidae

[trī′dak·nə‚dē]
(invertebrate zoology)
A family of bivalve mollusks in the subclass Eulamellibranchia which contains the giant clams of the tropical Pacific.
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In the heterodont branch, a clade including the families Tridacnidae and Cardiidae - and comprising all of the zooxanthellate clams examined, as well as two azooxanthellate clams, V.
The family Tridacnidae comprises two genera, Tridacna and Hippopus (Rosewater, 1965, 1982).
The morula-like cell and the type II cell have been observed only in the Tridacnidae, which suggests that this type of hemocyte may participate in the maintenance of zooxanthellae in giant clams.
The morula-like cells have been observed in several species of symbiotic clam in the families Tridacnidae and Cardiidae: Tridacna maxima (Reade and Reade, 1976); T.
fusca), and Tridacnidae (Tridacna maxima) have a low coral association such as Acropora cytherea, A.
06 pectinatum Tridacnidae Tridacna maxima Porites solida 18 3.