Antalis inaequicostata is a species of tusk shell, a type of marine mollusk. These organisms belong to the class Scaphopoda, which is further categorized into the order Dentaliida and the family Dentaliidae. Antalis inaequicostata is a common inhabitant of certain marine ecosystems, making its presence significant in these environments.
Description & Characteristics
Antalis inaequicostata, like other tusk shells, possesses a distinctive, elongated, and slightly curved shell. The shell is typically white or cream-colored, with a smooth surface. Its size varies, with individuals reaching a maximum length of approximately 60 millimeters. This species is characterized by its prominent longitudinal ribs, which are uneven in size and spacing, hence the specific epithet “inaequicostata.” The aperture at the wider end of the shell is the opening through which the animal extends its foot and tentacles for feeding and movement. The smaller end of the shell, known as the apex, is pointed and serves as the animal’s posterior end.
Habitat and Occurrence
Antalis inaequicostata is typically found in marine environments, specifically in the intertidal zone and on soft substrates like sand and mud. It is often encountered in shallow waters, with a depth range generally extending to about 100 meters. This species is frequently found in the neritic zone, which encompasses the shallow coastal waters of the ocean. Antalis inaequicostata is a widespread species, inhabiting various regions of the world, making it a prominent presence in these marine ecosystems.
Taxonomy
Antalis inaequicostata is classified within the class Scaphopoda, which is characterized by its unique, tube-shaped shells. This class is further subdivided into the order Dentaliida, a group of tusk shells. Finally, it belongs to the family Dentaliidae, which is a large and diverse family of tusk shells.
Feeding
Antalis inaequicostata is a suspension feeder, meaning it obtains its food by filtering particles from the surrounding water. It extends its tentacles, which are covered in cilia, into the water column. These cilia create currents that draw food particles, such as diatoms and other microscopic organisms, towards the mouth of the tusk shell. Antalis inaequicostata is an important part of the marine ecosystem, playing a role in the food web and contributing to the overall health of the environment.
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