Sclerotic rings are rings of bone found in the eyes of many animals in several groups of vertebrates, except for extant mammals and crocodilians.[dead link] They can be made up of single bones or multiple segments and take their name from the sclera. They are believed to have a role in supporting the eye, especially in animals whose eyes are not spherical, or which live underwater. Fossil sclerotic rings are known for a variety of extinct animals, including ichthyosaurs, pterosaurs, and dinosaurs, but are often not preserved.
- Milner, Angela. "Ophthalmosaurus icenicus: Why did it have such large eyes?". Natural History Museum, London. Retrieved 15 October 2013.
- Motani, Ryosuke (15 November 2001). "Eyes of Ichthyosaurs". UC Museum of Paleontology. Retrieved 15 October 2013.
- "Palaeos Vertebrates: Glossary S". Retrieved 2007-07-06.
- Pigdon, Dann. "Re: Sclerotic ring in eyes". Retrieved 2007-07-06.
|This vertebrate anatomy-related article is a stub. You can help Wikipedia by expanding it.|