monty
Aug 31, '07, 1:27pm
PZ dug up some footage of Vampy's unusual eye protection.
http://scienceblogs.com/pharyngula/2007/08/friday_cephalopod_the_vampire.php
I'd wondered at a lot of the footage of these guys if they have no pupil at all, or if they just usually have it very expanded... now I'm guessing that they have no pupil/iris structure at all, and just use this sphincter mechanism. Does anyone know if this sphincter arrangement is unique in vampyroteuthis? I know some squids have eyelids, but I think they're linear like ours, and they (usually?) have a circlular pupil (while cuttles have W-shaped ones and octos have rectangles, usually, but they're all more typical iris-pupil arrangements AFAIK.) I also don't know if they have corneas...
http://scienceblogs.com/pharyngula/2007/08/friday_cephalopod_the_vampire.php
I'd wondered at a lot of the footage of these guys if they have no pupil at all, or if they just usually have it very expanded... now I'm guessing that they have no pupil/iris structure at all, and just use this sphincter mechanism. Does anyone know if this sphincter arrangement is unique in vampyroteuthis? I know some squids have eyelids, but I think they're linear like ours, and they (usually?) have a circlular pupil (while cuttles have W-shaped ones and octos have rectangles, usually, but they're all more typical iris-pupil arrangements AFAIK.) I also don't know if they have corneas...