A simple visual system without neurons in jellyfish larvae
(2003) In Royal Society of London. Proceedings B. Biological Sciences 270(1531). p.2349-2354- Abstract
- Earlier detailed studies of cnidarian planula larvae have revealed a simple nervous system but no eyes or identifiable light sensing structures. Here, we describe the planula of a box jellyfish, Tripedalia cystophora, and report that these larvae have an extremely simple organization with no nervous system at all. Their only advanced feature is the presence of 10-15 pigment-cup ocelli, evenly spaced across the posterior half of the larval ectoderm. The ocelli are single cell structures containing a cup of screening pigment filled with presumably photosensory microvilli. These rhabdomeric photoreceptors have no neural connections to any other cells, but each has a well-developed motor-cilium, appearing to be the only means by which light... (More)
- Earlier detailed studies of cnidarian planula larvae have revealed a simple nervous system but no eyes or identifiable light sensing structures. Here, we describe the planula of a box jellyfish, Tripedalia cystophora, and report that these larvae have an extremely simple organization with no nervous system at all. Their only advanced feature is the presence of 10-15 pigment-cup ocelli, evenly spaced across the posterior half of the larval ectoderm. The ocelli are single cell structures containing a cup of screening pigment filled with presumably photosensory microvilli. These rhabdomeric photoreceptors have no neural connections to any other cells, but each has a well-developed motor-cilium, appearing to be the only means by which light can control the behaviour of the larva. The ocelli are thus self-contained sensory-motor entities, making a nervous system superfluous. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/131481
- author
- Nordström, Karin LU ; Wallén, Rita LU ; Seymour, Jamie and Nilsson, Dan-E LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Royal Society of London. Proceedings B. Biological Sciences
- volume
- 270
- issue
- 1531
- pages
- 2349 - 2354
- publisher
- Royal Society Publishing
- external identifiers
-
- pmid:14667350
- wos:000186705200005
- scopus:0345304378
- ISSN
- 1471-2954
- DOI
- 10.1098/rspb.2003.2504
- language
- English
- LU publication?
- yes
- id
- 09089878-c04d-4f6a-bd09-a56049264b43 (old id 131481)
- date added to LUP
- 2016-04-01 16:51:31
- date last changed
- 2024-05-10 12:13:27
@article{09089878-c04d-4f6a-bd09-a56049264b43,
abstract = {{Earlier detailed studies of cnidarian planula larvae have revealed a simple nervous system but no eyes or identifiable light sensing structures. Here, we describe the planula of a box jellyfish, Tripedalia cystophora, and report that these larvae have an extremely simple organization with no nervous system at all. Their only advanced feature is the presence of 10-15 pigment-cup ocelli, evenly spaced across the posterior half of the larval ectoderm. The ocelli are single cell structures containing a cup of screening pigment filled with presumably photosensory microvilli. These rhabdomeric photoreceptors have no neural connections to any other cells, but each has a well-developed motor-cilium, appearing to be the only means by which light can control the behaviour of the larva. The ocelli are thus self-contained sensory-motor entities, making a nervous system superfluous.}},
author = {{Nordström, Karin and Wallén, Rita and Seymour, Jamie and Nilsson, Dan-E}},
issn = {{1471-2954}},
language = {{eng}},
number = {{1531}},
pages = {{2349--2354}},
publisher = {{Royal Society Publishing}},
series = {{Royal Society of London. Proceedings B. Biological Sciences}},
title = {{A simple visual system without neurons in jellyfish larvae}},
url = {{https://lup.lub.lu.se/search/files/4801123/624216.pdf}},
doi = {{10.1098/rspb.2003.2504}},
volume = {{270}},
year = {{2003}},
}