Retrieving "Rocky Substrata" from the archives

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1. Bivalve

   Linked via "rocky substrata"

   | Subclass | Defining Characteristic | Primary Habitat Preference | Example Genera |
   | :--- | :--- | :--- | :--- |
   | Pteriomorphia | Byssal attachment capability | Shallow marine, rocky substrata | Mytilus, Pinctada |
   | Heterodonta | Complex hinge teeth; varied lifestyles | Global; dominance in soft sediments | Mercenaria, Venerupis |
   | Paleoheterodonta | Primitive …