Bu yap\u0131lara, pineal (epifiz) ve parapineal (para-epifiz) organlar denir. G\u00fcn\u00fcm\u00fczde ya\u015fayan hayvanlar aras\u0131nda tek \u00e7enesiz bal\u0131k olan ve bufo bal\u0131\u011f\u0131 denilen bir bal\u0131k da, her iki yap\u0131ya sahiptir. Ama kimi modern s\u00fcr\u00fcngenler, \u00fc\u00e7\u00fcnc\u00fc g\u00f6z olarak adland\u0131r\u0131lan bir epifiz organ\u0131na sahiptir.<\/p>\n
Ara\u015ft\u0131rmac\u0131lar 150 y\u0131l \u00f6nce Yale \u00dcniversitesi \u00f6\u011frencileri taraf\u0131ndan toplanm\u0131\u015f fosilleri incelediler.\u00a0 Fosillerin, X-\u0131\u015f\u0131nl\u0131 bilgisayar tomografisi ad\u0131 verilen bir teknikle taranmas\u0131, kafatas\u0131ndaki hem \u00fc\u00e7\u00fcnc\u00fc g\u00f6z hem de d\u00f6rd\u00fcnc\u00fc g\u00f6z i\u00e7in olan bo\u015fluklar\u0131 ortaya \u00e7\u0131kard\u0131.<\/p>\n
Antik kertenkelenin bu organlarla ne yapt\u0131\u011f\u0131 bilinmiyor, ama kimi modern omurgal\u0131lar, y\u00f6nlerini tayin edebilmek i\u00e7in, epifiz bezlerinden gelenleri derleyerek, g\u00fc\u00e7lendirilmi\u015f bir \u0131\u015f\u0131\u011fa duyarl\u0131l\u0131k kullan\u0131yorlar.\u00a0 S. ensidens<\/em> bug\u00fcnk\u00fc kimi kertenkelelerin yapt\u0131\u011f\u0131 gibi, g\u00fcne\u015fin a\u00e7\u0131s\u0131n\u0131 bir pusula gibi kullan\u0131yor ve polarize \u0131\u015f\u0131\u011f\u0131 alg\u0131l\u0131yor olabilir. Ya da daha \u00e7ok, kimi g\u00f6\u00e7men ku\u015flar ve amfibiyenler gibi, D\u00fcnya\u2019n\u0131n manyetik alan\u0131n\u0131 kullanarak y\u00f6n\u00fcn\u00fc tayin ediyor olabilir.<\/p>\n Ekstra g\u00f6zler<\/strong><\/p>\n Saniwa ensidens<\/em>\u2019in yak\u0131ndan benzedi\u011fi modern dev kertenkele Varanus mertensi<\/em>\u2019nin kafatas\u0131 \u00fczerine, S. ensidens<\/em>\u2019in kafatas\u0131 bindirilmi\u015f olarak g\u00f6steriliyor. Kafas\u0131n\u0131n \u00fczerindeki iki delik, epifiz ve para-epifiz organlar olarak adland\u0131r\u0131lan, onun \u00fc\u00e7\u00fcnc\u00fc ve d\u00f6rd\u00fcnc\u00fc g\u00f6z\u00fcn\u00fcn yeridir. \u00a9 K.t. Smith ve arkada\u015flar\u0131, Current Biology<\/em>.<\/p>\n Antik bir dev kertenkelenin kafatas\u0131, \u0131\u015f\u0131\u011fa duyarl\u0131 (fotosens\u00f6r) yap\u0131lar i\u00e7in iki delik ortaya \u00e7\u0131kard\u0131. Carolyn Gramling\u2019in haberine g\u00f6re, 50 milyon y\u0131l \u00f6nce, \u015fimdiki Wyoming\u2019de dev bir kertenkele d\u00fcnyay\u0131 d\u00f6rt g\u00f6zle alg\u0131l\u0131yordu. Bilinen tek \u00e7eneli omurgal\u0131 olan Saniwa ensidens, bizim genellikle g\u00f6z olarak d\u00fc\u015f\u00fcnd\u00fc\u011f\u00fcm\u00fcz yap\u0131lara ek olarak, ba\u015f\u0131n\u0131n \u00fcst\u00fcnde de iki tane g\u00f6z benzeri \u0131\u015f\u0131\u011fa duyarl\u0131 […]<\/p>\n","protected":false},"author":470,"featured_media":22876,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,21,32,232],"tags":[197,200,1986,2800],"class_list":["post-22874","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","category-biyoloji","category-evrim","category-yerbilimleri","tag-biyoloji","tag-evrim","tag-goz","tag-kertenkeleler"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t![\"\"](\"https:\/\/bilimvegelecek.com.tr\/wp-content\/uploads\/2018\/04\/D\u00f6rt-g\u00f6zle-g\u00f6ren-antik-dev-kertenkele-300x225.jpg\")
<\/p>\n","protected":false},"excerpt":{"rendered":"