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The bilaterally symmetric rhopalial nervous system of box jellyfish

In English

Författare

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.

Publiceringsår

2006

Språk

Engelska

Sidor

1391-1405

Publikation/Tidskrift/Serie

Journal of Morphology

Volym

267

Issue

12

Dokumenttyp

Artikel i tidskrift

Förlag

John Wiley & Sons Inc.

Ämne

  • Zoology

Nyckelord

  • box jellyfish • rhopalium • eyes • neurons • bilateral symmetry

Status

Published

Forskningsgrupp

  • Lund Vision Group

ISBN/ISSN/Övrigt

  • ISSN: 1097-4687