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Aristotle's lantern in a sea urchin, viewed in lateral section. The mouth of most sea urchins is made up of five calcium carbonate teeth or plates, with a fleshy, tongue-like structure within. The entire chewing organ is known as Aristotle's lantern from Aristotle's description in his History of Animals (translated by D'Arcy Thompson):
In the center of the test, the West African Sand Dollar has a feeding device called “Aristotle’s lantern.” Aristotle’s lantern is a complex system of jaws and muscles which are capable of a variety of feeding types including suspension feeding, herbivory and detritivory feeding, and occasionally predation. Adaptations to this lantern ...
Strongylocentrotus droebachiensis eats by using a special appendage called an Aristotle’s lantern to scrape or tear their food into digestible bits. This structure is made of five calcareous, protractible teeth that are maneuvered by a complex muscular structure.
All camarodonts have imperforate tubercles and compound ambulacral plates with the lowest elements enlarged. The pores are at regular intervals along the ambulacral plates from the apex to the mouth opening or peristome. The Aristotle's lantern, or jaw system, has keeled teeth with the supports meeting above the "foramen magnum". [2]
The tubercles lack the crenulations or ring of cog-like structures that articulate with the spines in certain other families. The Aristotle's lantern, or jaw apparatus, has the keeled teeth and the epiphyses united above the foramen magnum, the V-shaped gap between the hemipyramids that support the lantern's tooth. [2]
Around 170,000 lantern size glass slides, manufactured from 1900 up to 1980 from all fields of Archeology and Art History, used by famous art historians such as Erwin Panofsky and Wolfgang Schöne. Slide Projectors. Digitization in progress since 2016, about 3,000 images online in database (password protected).
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The mouthparts, known as the Aristotle's lantern, have simple plates and grooved teeth. The gills are relatively small, and in many species, entirely absent. The gills are relatively small, and in many species, entirely absent.