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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):
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 have allowed sand dollars to live in habitats which have fine, shifting substrates.
1 - genital plate 2 - gonopore 3 - anus 4 - hard plate with madreporite 5 - axial gland 6 - gonad 7 - intestine 8 - ampullae 9 - test 10 - radial canal 11 - esophagus 12 - Aristotle’s lantern 13 - teeth 14 - mouth 15 - nerve ring 16 - ring canal 17 - test plates 18 - tube feet 19 - spines
The works of Aristotle, sometimes referred to by modern scholars with the Latin phrase Corpus Aristotelicum, is the collection of Aristotle's works that have survived from antiquity. According to a distinction that originates with Aristotle himself, [ citation needed ] his writings are divisible into two groups: the " exoteric " and the ...
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]
Authorities in Michigan have charged three people with murder in connection with a New Year’s Day shooting that killed a woman and her father, and injured the woman's husband.
Caitlin Hale and Angelo Massagli, co-stars from School Of Rock, during their lavish wedding ceremony in New York, 22 years after their iconic movie together.
Will Ferrell is closing out the holiday season in iconic form. The actor and comedian was spotted at the Los Angeles Kings game Sunday night, sitting rinkside decked head to toe in full "Elf" gear ...