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Topics related to "ocellus"

eye
eye organ of vision and light perception. In humans the eye is of the camera type, with an iris diaphragm and variable focusing, or accommodation. Other types of eye are the simple eye, found in many invertebrates, and the compound eye, found in insects and many other arthropods. In an alternate ... Read more

Encyclopedia entries related to "ocellus"

ocellus
Book article from: The Columbia Encyclopedia, Sixth Edition ocellus (pl. ocelli): see eye .
eye
Book article from: The Columbia Encyclopedia, Sixth Edition ...invertebrate animals, including flatworms, annelid worms (such as the earthworm), mollusks, crustaceans, and insects. An ocellus has a layer of photosensitive cells that can set up impulses in nerve fibers; the more advanced types also have a rigid lens...

Dictionary entries related to "ocellus"

ocellus
Book article from: A Dictionary of Zoology ocellus (pl. ocelli) A simple eye , which has a single, thickened, cuticular lens. The epithelial cells below the lens are transparent, and below them there are many light-sensitive nerve cells.
simple eye
Book article from: A Dictionary of Zoology simple eye Eye consisting of a single ocellus . Such eyes are found in adult insects, and in the larvae of hemimetabolous insects. Usually there are three, arranged triangularly...
ocelli
Book article from: A Dictionary of Zoology ocelli See OCELLUS .
ocellar
Book article from: A Dictionary of Zoology ocellar Applied to the region on the frons (see CLYPEUS ) of the head of an insect that bears the ocelli (see OCELLUS ). This includes an approximately triangular area (the ocellar triangle) and may bear ocellar bristles.
eye
Book article from: A Dictionary of Zoology ...An organ, sensitive to light, that is developed in many animals. In its simplest form, it consists of a light receptor (ocellus) capable of distinguishing light from shade. In Arthropoda there are compound eyes, each consisting of many separate receptors...

Related newspaper, magazine, and trade journal articles from HighBeam Research

Photoreceptive Systems in Ascidians[dagger]
Magazine article from: Photochemistry and Photobiology; 3/1/2007; ; 700+ words ; ...basal chordates, contains an eye-spot (ocellus), which is responsible for the photic...evolution of the vertebrate eyes. The ocellus of the ascidian larva has ciliary photoreceptors...organs with a pigment cell: an eyespot (ocellus) and a gravity sense organ (otolith...
Origin of the Vertebrate Visual Cycle: III. Distinct Distribution of RPE65 and [beta]-carotene 15,15'-Monooxygenase Homologues in Ciona intestinalis[dagger]
Magazine article from: Photochemistry and Photobiology; 11/1/2006; ; 700+ words ; ...and Ci-CRALBP are localized in both ocellus photoreceptor cells and surrounding non...is not significantly expressed in the ocellus and brain vesicle of the larva. Ci...Ci-BCO is predominantly localized in ocellus photoreceptor cells of the larva. The...
Research from T. Horie and co-authors reveals new findings on behavior.
Newspaper article from: Biotech Week; 8/27/2008; 688 words ; ...photoreceptor cells are associated with the ocellus pigment cell on the right side of the...ocelli: a 'conventional' pigmented ocellus containing the group I and group II photoreceptor cells and a novel nonpigmented ocellus solely consisting of the group III photoreceptor...
Absorption spectra of planarian visual pigments and two states of the metarhodopsin intermediates
Magazine article from: Photochemistry and Photobiology; 1/1/1999; ; 700+ words ; ...in a smaller ERP in the dark-adapted ocellus. ^^Abbreviations: ERP, early receptor...in the ocelli (3,4). The planarian ocellus is composed of photoreceptor cells whose...coverslip produced a transparent region in the ocellus for MSP or to tease individual photoreceptors...
Two new species of Dryinus Latreille (Hymenoptera: Dryinidae) from China.(Report)
Magazine article from: Florida Entomologist; 9/1/2007; ; 700+ words ; ...two lateral ocelli; OL is the distance between the inner edges of a lateral ocellus and the median ocellus; OOL is the distance from the outer edge of a lateral ocellus to the compound eye; OPL is the distance from the posterior edge of a lateral...
A new species of Anteon (Hymenoptera: Dryinidae) from Argentina.(Report)
Magazine article from: Florida Entomologist; 6/1/2008; ; 700+ words ; ...2 lateral ocelli; OL is the distance between the inner edges of a lateral ocellus and the median ocellus; OOL is the distance from the outer edge of a lateral ocellus to the compound eye; OPL is the distance from the posterior edge of a lateral...
Two new species of Dryinidae (Hymenoptera: Chrysidoidea) from China.(Report)
Magazine article from: Florida Entomologist; 6/1/2009; ; 700+ words ; ...two lateral ocelli; OL is the distance between the inner edges of a lateral ocellus and the median ocellus; OOL is the distance from the outer edge of a lateral ocellus to the compound eye; OPL is the distance from the posterior edge of a lateral...
PILOBOLUS CONTORTS CONVENTIONS TROUPE MIXES HUMOR WITH ABSURDITY.(Local)
Newspaper article from: Albany Times Union (Albany, NY); 11/27/1986; 700+ words ; ...Tuesday at Proctor's in Schenectady. "Ocellus" popped up in the middle section of the...of bodies was the company signature. "Ocellus" is still breathtaking, a kaleidoscope...Ciona" is an acrobatic first cousin to "Ocellus." Choreographed a decade ago, it resembles...
Origin of the Vertebrate Visual Cycle[dagger]
Magazine article from: Photochemistry and Photobiology; 3/1/2007; ; 700+ words ; ...which is predominantly localized in ocellus photoreceptor cells of the larva, Ci-RPE65 is not significantly expressed in the ocellus and brain vesicle of the larva. Ci...The brain contains a simple eyespot (ocellus), which is responsible for characteristic...
Pilobolus baffles as it entertains
Newspaper article from: Chicago Sun-Times; 3/12/1986; ; 689 words ; ...in collaboration with Lisa Giobbi; "Ocellus," Robby Barnett, Lee Harris, Moses...kind of imagination, "Bonsai" and "Ocellus," looked tame. Only once - in "Bonsai...bodies. The dancing in "Bonsai" and "Ocellus" was skillful enough. It just didn...