Anchor

Definition

In C., H.; in H. basalia megascleres with one end of anchor shape (e.g., genus Hyalonema); it can be dianchorate (e.g., Holascus tasmanensis); in C. a triactine or tetractine present at the base of the calcareous sponge that helps the individual to attach to the substrate
(e.g., Amphoriscus ancora, A. synapta); compare with demosponge anatriaene.

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