Terebratulina retusa is a species of brachiopod belonging to the family Cancellothyrididae. It is a common and widespread species found in various marine environments around the world.
Description & Characteristics
Terebratulina retusa is a small to medium-sized brachiopod, typically reaching a maximum size of around 25 millimeters in length. The shell is characterized by its smooth, oval shape and a distinct beak at the anterior end. The shell is usually white or cream-colored, although it can sometimes be tinged with pink or brown. The valves are often slightly convex, and the hinge line is straight. The pedicle opening is small and circular, located at the posterior end of the shell.
Habitat and Occurrence
Terebratulina retusa is a common inhabitant of intertidal and subtidal zones, typically found in depths ranging from the low intertidal to about 100 meters. It prefers rocky or sandy substrates, and can also be found attached to other marine organisms such as algae, sponges, and sea anemones. It is commonly found in both the neritic and oceanic zones, indicating its adaptability to different marine environments.
Taxonomy
Terebratulina retusa is classified within the Class Rhynchonellata, Order Terebratulida, and Family Cancellothyrididae. This taxonomic classification highlights its relationship to other brachiopod species within the Rhynchonellata class, and its specific characteristics within the Terebratulida order and Cancellothyrididae family.
Feeding
Terebratulina retusa is a suspension feeder, using its lophophore to filter food particles from the surrounding water. The lophophore is a crown of ciliated tentacles that creates a current that draws water into the mantle cavity, where food particles are trapped and directed towards the mouth. This feeding strategy allows Terebratulina retusa to thrive in environments with a steady supply of plankton and other organic matter.
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