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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.
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):
The sea urchin is the first animal with a sequenced genome that (1) is a free-living, motile marine invertebrate; (2) has a bilaterally organized embryo but a radial adult body plan; (3) has the endoskeleton and water vascular system found only in echinoderms; and (4) has a nonadaptive immune system that is unique in the enormous complexity of ...
VILNIUS (Reuters) -Lithuania has found no sign that the crash on Monday of a DHL cargo plane was caused by sabotage, and believes technical issues were a more likely explanation, officials said on ...
Percentile Group. 25th Percentile. 50th Percentile. 75th Percentile. 90th Percentile. 99th Percentile. Income Range. $31,346 to $43,236. $62,693 to $79,987. $115,658 ...
Former NHL player Paul Bissonnette is fine after getting into an altercation with six men at a local Scottsdale restaurant. (Photo by Cliff Hawkins/Getty Images for The Match) (Cliff Hawkins via ...
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Strongylocentrotus droebachiensis is found on rocky substratum in the intertidal and up to depths of 1,150 meters (3,770 ft). It uses its strong Aristotle's lantern to burrow into rock, and then can widen its home with the spines.