Aristotle's lantern occurs in which class?
Correct answer: A. Echinoidea
- A. Echinoidea
- B. Asteroidea
- C. Holothuroidea
- D. Ophiuroidea
Explanation
Aristotle's lantern occurs in the Class Echinoidea. Five teeth surrounding the mouth are attached to a masticatory apparatus call Aristotle's lantern. It is named Aristiotle's lantern after its discoverer and because it resembles an ancient Greek ship lantern. It is situated within the test and projects slightly through the mouth. It consists of five large calcareous plates, called pyramids or alveoli. By means of special protractor and retractor muscles, the lantern can be partially protracted and retracted through the mouth. Aristotle's lantern is used in feeding.
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