Search results
Results from the WOW.Com Content Network
The term "ocellus" (plural ocelli) is derived from the Latin oculus (eye), and literally means "little eye". In insects, two distinct ocellus types exist: [9] dorsal (top-most) ocelli, and lateral ocelli (often referred to as ocelli and stemmata, respectively), most insects have dorsal ocelli while stemmata are found in the larvae of some ...
The principal and secondary eyes likely evolved separately, with the principal eyes being homologous to the ocelli of insects but the secondary eyes being derived from compound eyes. Since the secondary eyes lack the remnants of the borders between the ommatidia typically present in eyes evolved through fusion of the ommatidia, it is more ...
Some reptiles, such as the sand lizard of Europe, have eyespots; in the sand lizard's case, there is a row of spots along the back, and a row on each side. [12]Many species of cat, including Geoffroy's cats, jungle cats, pampas cats, and servals, have white markings, whether spots or bars, on the backs of their ears; it is possible that these signal "follow me" to the young of the species.
The ocelli are in an otd-rich area and disruption of otd results in loss of the ocelli, but does not affect the compound eyes. [10] Inversely, the transcription factor dachshund (dac) is required for the patterning of compound eyes, but mutants lacking dac do not exhibit loss of the ocelli. [11] Different opsins are used in the ocelli of ...
There is often confusion around the terminology used to describe these unique animals. ... and an ocelli or “eyespot” pattern at the end. The overall effect is an iridescent pattern of golds ...
To distinguish R. flavipes from similar species (at least in the United States), the position of the ocelli can be used: looking at the head from the side, the distance between the ocellus and the nearest compound eye is at least as large as the diameter of the ocellus. [18] [20]
The ocelli, when present, are located in the top of the head, arranged at the corners of a triangle in an area called stemmaticum or ocellar triangle. For the purpose of systematics, the presence, the arrangement, and the conformation of the cephalic bristles is important and they have a specific terminology.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!