Discuss the morphology and geological history of brachiopods. Add a note on the living fossil - Lingula.  

Brachiopods are a group of marine invertebrates that have a shell composed of two parts and lived in the oceans of the world for over 400 million years. They are commonly referred to as "lamp shells" because of their shape, which resembles an old-fashioned oil lamp. Brachiopods are important fossils because they provide valuable information about the evolution of life on Earth and the conditions of ancient oceans.

The morphology of brachiopods is characterized by a shell composed of two parts: the valve and the pedicle. The valve is the top part of the shell that protects the body of the brachiopod and provides a surface for attachment to the substrate. The pedicle is the bottom part of the shell that extends from the body of the brachiopod and anchors it to the substrate. The morphology of brachiopods is diverse and can range from smooth and round ______ ___ _______ ______ ____ ____.
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