The bilaterally symmetric rhopalial nervous system of box jellyfish
Author
Summary, in English
Cubomedusae, or box jellyfish, have the most elaborate visual system of all cnidarians. They have 24 eyes of four morphological types, distributed on four sensory structures called rhopalia. Box jellyfish also display complex, probably visually guided behaviors such as obstacle avoidance and fast directional swimming. Here we describe the strikingly complex and partially bilaterally symmetrical nervous system found in each rhopalium of the box jellyfish, Tripedalia cystophora, and present the rhopalial neuroanatomy in an atlas-like series of drawings. Discrete populations of neurons and commissures connecting the left and the right side along with two populations of nonneuronal cells were visualized using several different histochemical staining techniques and electron microscopy. The number of rhopalial nerve cells and their overall arrangement indicates that visual processing and integration at least partly happen within the rhopalia. The larger of the two nonneuronal cell populations comprises 2,000 likely undifferentiated cells and may support a rapid cell turnover in the rhopalial nervous system.
Department/s
Publishing year
2006
Language
English
Pages
1391-1405
Publication/Series
Journal of Morphology
Volume
267
Issue
12
Document type
Journal article
Publisher
John Wiley & Sons Inc.
Topic
- Zoology
Keywords
- box jellyfish • rhopalium • eyes • neurons • bilateral symmetry
Status
Published
Research group
- Lund Vision Group
ISBN/ISSN/Other
- ISSN: 1097-4687