braquiópodos

Brachiopods are marine invertebrates belonging to the phylum Brachiopoda. Despite their superficial resemblance to bivalve mollusks like clams, they are a distinct group with a different evolutionary history. Brachiopods possess two shells, or valves, which are typically calcitic or phosphatic. These valves are not symmetrical like those of a clam; instead, one valve is usually larger and ventral, while the other is smaller and dorsal.

Inside the shell, brachiopods have a lophophore, a distinctive feeding apparatus consisting of a coiled, ciliated tentacular structure used to filter food particles from the water. They attach themselves to the seafloor or other substrates using a fleshy stalk called a pedicle. Brachiopods are exclusively marine and are found in all oceans, from shallow intertidal zones to the deep sea.

Fossil evidence indicates that brachiopods were once incredibly abundant and diverse, flourishing during the Paleozoic Era. Their fossil record is extensive, providing valuable insights into ancient marine ecosystems and geological time. While their diversity has significantly decreased since the Paleozoic, a few hundred species of living brachiopods still exist today, often referred to as "living fossils" due to their ancient lineage. They are generally slow-moving and filter-feeders, playing a role in benthic communities.