Morphology of the compound eye of the giant deep-sea isopod Bathynomus giganteus

Journal of Morphology
S C ChamberlainW P Dossert

Abstract

The structural organization of the compound eye of the largest known isopod, Bathynomus giganteus, is described from four specimens maintained in the laboratory for as long as two months. Living specimens have not previously been available for study. The two triangular compound eyes measure about 18 mm on the dorsal edge and are separated by an interocular distance of 25 mm. They face forward and slightly downward and may have significant overlap in visual fields. Each eye contains about 3,500 ommatidia in animals of body lengths from 22.5 cm to 37.5 cm. The packing of ommatidia is not uniform across the retina, but is nearly hexagonal in the dorsal central region and nearly square in the ventral and lateral periphery. The dioptric elements in each ommatidium consist of a laminar cornea, which is flat externally and convex internally, and a bipartite crystalline cone. Sometimes seven and sometimes eight retinular cells closely appose the proximal tip of the cone and bear the microvilli of the rhabdom. Proximal to the rhabdom the retinular cells form thin pillars near the periphery of the ommatidium, and the central portion along the optic axis at this level is occupied by interstitial cells that contain massive arrays of clear ...Continue Reading

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Citations

Jan 1, 1993·Tissue & Cell·V B Meyer-Rochow, W A Reid
Sep 1, 1995·Visual Neuroscience·P J O'NeillS C Chamberlain
Sep 16, 2004·Biological Reviews of the Cambridge Philosophical Society·Eric J Warrant, N Adam Locket
Apr 10, 2007·Micron : the International Research and Review Journal for Microscopy·Monalisa Mishra, Victor Benno Meyer-Rochow
Jul 13, 2002·The Journal of Comparative Neurology·Robert B SacunasBarbara-Anne Battelle
Sep 8, 2012·The Journal of Experimental Biology·Tamara M FrankThomas W Cronin

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