trilobite eye

A Dictionary of Earth Sciences | 1999 | 486 words | Copyright

trilobite eye The eyes of trilobites (Trilobita) are compound and made up of radially disposed visual units. Most trilobite eyes are ‘holochroal’ (i.e. many polygonal lenses are in contact with one another and covered by a single cornea). ‘Schizochroal’ eyes occur in the Phacopina (i.e. the lenses are large, separated from one another, each has its own cornea, and each lens is in two parts); it has been shown that this arrangement produces a sharp focus.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

AILSA ALLABY and MICHAEL ALLABY. "trilobite eye." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "trilobite eye." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O13-trilobiteeye.html

AILSA ALLABY and MICHAEL ALLABY. "trilobite eye." A Dictionary of Earth Sciences. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-trilobiteeye.html

Learn more about citation styles