How does the pedicle of Lingula help it burrow and remain in its burrow?

The genus Lingula, a type of lamp shell, is unique among many brachiopods because it inhabits burrows in mud or sand rather than attaching to hard surfaces.1

The pedicle serves as a vital anchor for the animal at the bottom of its burrow. While most modern brachiopods use their pedicle to attach to pebbles or stones, Lingula utilizes this muscular organ to secure itself within its vertical tunnel. This attachment allows the animal to remain stable in its environment, providing the necessary leverage to protrude its anterior end above the mud surface to feed when conditions are safe.1