Structure of the eye of Haideotriton wallacei, a North American troglobitic salamander

✍ Scribed by Ronald A. Brandon

• Book ID: 102902670
• Publisher: John Wiley and Sons
• Year: 1968
• Tongue: English
• Weight: 631 KB
• Volume: 124
• Category: Article
• ISSN: 0362-2525
• DOI: 10.1002/jmor.1051240307

✦ Synopsis

The eye of Haideotriton wallacei is more reduced histologically than those of other troglobitic salamanders. The tiny eye is imbedded in a mass of adipose tissue. No extrinsic eye muscles are present. A rudimentary lens is present in about half of the eyes examined. In two instances the lens is surrounded by a small chamber; most eyes lack a chamber. The retina and iris are relatively undifferentiated. The relatively massive retina lacks rods and cones, an outer plexiform layer and subdivided nuclear layers. A tiny optic nerve runs to the brain.