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The eyes of a “nobody”,Anoplodactylus petiolatus (Pantopoda; Anoplodactylidae)
Helgoländer Meeresuntersuchungen volume 50, pages 25–36 (1996)
Abstract
The fine structure of the four ocelli ofAnoplodactylus petiolatus was examined using serial longitudinal and transversal sections of the eye hill. Each pigment cup ocellus is composed of a (planconvex) cuticular lens, lens forming hypodermal cells, inverse retinula cells with latticed rhabdom and surrounding tapetum and pigment layers. Within the retinula cells a distal “vitreous” zone, a nucleus zone and a proximal rhabdomeric zone can be distinguished. Retinula cell axons originate proximally. The tapetum cells contain several layers of reflecting crystals. Distally, they have a common microvillous region. The intraretinal “vitreous” zone contains glycogen-like particles in the centre and rough ER in the periphery. Contrary to other Pantopoda vitreous cells, a praeretinal membrane and a vertical lens groove have not been observed inAnoplodactylus. While the presence of four (median) ocelli appears to be a primitive characteristic, the inverse orientation of the retinula cells in combination with a tapetum lucidum represents a highly derived characteristic among arthropod median eyes.
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Heß, M., Melzer, R.R. & Smola, U. The eyes of a “nobody”,Anoplodactylus petiolatus (Pantopoda; Anoplodactylidae). Helgolander Meeresunters 50, 25–36 (1996). https://doi.org/10.1007/BF02367135
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DOI: https://doi.org/10.1007/BF02367135