eyespot

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eyespot

[′ī‚spät]
(botany)
A small photosensitive pigment body in certain unicellular algae.
A dark area around the hilum of certain seeds, as some beans.
(invertebrate zoology)
A simple organ of vision in many invertebrates consisting of pigmented cells overlying a sensory termination.
(plant pathology)
A fungus disease of sugarcane and certain other grasses which is caused by Helminthosporium sacchari and characterized by yellowish oval lesions on the stems and leaves.
References in periodicals archive ?
If the effect is instead due to a resemblance to predators' eyes--an old and now disputed idea--that advantage could have nudged along the evolution of more realistic eyespots on wings.
Species of Eurybia are usually large, mostly gray or brown butterflies, usually with an eyespot at the end of the discal cell on the forewing and submarginal spots or occeli along the outer margin on both wings (Hall & Ahrenholz 2010); many species have iridescent scales at least on the hind wing.
Developmental mode in opisthobranchs is most reliably documented when based on observations of the morphology of hatching veliger larvae--particularly the presence or absence of eyespots and propodium--accompanied by measurements of egg size, embryonic period and temperature, and size and type of shell at hatching (Bonar 1978; Goddard 2004).
The cercariae were apharyngeate with pigmented eyespots, a lightly spined body, dorsal and ventral fin folds on the full length of the tail furcae, 5 pairs of flame cells, and 3 pairs of penetration glands (Figure 3).
What begins as a thought of Eden transforms into nothingness and words, false eyespots, shifts to a memory of two people lying in the sand, fused to sky and sea, two people who bequeathed to one another / a life that does not die like anything.
Eyespots are light-sensitive patches that allow simple organisms, such as jellyfish and some other algae, to sense their environments.
245 (2005) (finding a computer displaying eyespots substantially
Eyeless phyla are therefore degenerate or failed to develop eyespots further.
Sundochernes differs from all other chernetid genera by the following combination of characters: flagellum with 3 blades; spermathecae with 2 thickened tubes with rounded terminal bulbs; legs without tactile setae; 1 pair of eyespots present; vestitural setae generally small, dentate and clavate.
Ovigerous females collected from the West Branch of the Grand Calumet River and from Illinois, Lake County, Dead River mouth in Illinois Beach State Park included females with 1st instar and ova with eyespots on the verge of eclosion (Table 1).