The development and evolution of the eyes of vent shrimps (Decapoda: Bresiliidae)
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094, meer
Ook verschenen in:(1998). Proceedings of the First International Symposium on Deep-Sea Hydrothermal Vent Biology: Funchal, Madeira, Portugal 20-24 October 1997. Cahiers de Biologie Marine, 39(3-4). Station Biologique de Roscoff: Roscoff. 219-392 pp., meer
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| Auteurs | | Top |
- Gaten, E.
- Herring, P.J.
- Shelton, P.A.
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| Abstract |
The question of how the thoracic organ of Rimicaris exoculata Williams & Rona, 1986 has evolved from the compound eyes of ancestral deep-sea shrimps is unresolved. Shrimp compound eyes generally consist of a hemispherical array of ommatidia on the end of an eyestalk. The eyestalk usually contains the optic neuropiles (the lamina, medulla externa and medulla interna) in an optic tract that projects to the region of the brain known as the lateral protocerebrum. It is not immediately apparent how this arrangement could have evolved into that found in vent shrimps such as Rimicaris exoculata in which the large thoracic organ underlies the dorsal carapace, and from which axons project to the back of the protocerebrum (O'Neill et al., 1995). Using the limited range of developmental stages available we examined eye development in vent shrimps to see if this elucidates the problem. Using limited range of developmental stages available we examined eye development in vent shrimps to see if this elucidates the problem. |
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