Brachiopod ★ Trusted & Direct

They are divided into two main groups: Inarticulates (no hinges, simple muscle systems) and Articulates (hinged with a complex system).

They are benthic (sea-floor dwellers) and sessile (permanently attached to the seafloor), generally filter-feeding. brachiopod

They use a specialized organ called a lophophore , a coil-shaped tentacle structure, to trap food, rather than gills. They are divided into two main groups: Inarticulates

While decimated by the end-Permian mass extinction, they are not extinct, with ~400+ extant species. 🔬 Biology and Lifestyle a coil-shaped tentacle structure

They were the most common shelled macroinvertebrates in the Paleozoic era.