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A presumed new photoreceptor in copepod crustaceans.

Elofsson, Rolf LU (1970) In Zeitschrift für Zellforschung und mikroskopische Anatomie1948-01-01+01:001974-01-01+01:00 109(3). p.316-326
Abstract (Swedish)
A new photoreceptor in the Copepoda is described. The organ, previously called Gicklhorn's organ (Elofsson, 1966a), is paired and is usually situated beneath the cuticle of the front. Each member of the pair consists of two cells. From the anterolateral position, two nerves lead to the lateral part of the brain. No connexion with the nauplius eye is found. Each cell of the organ has microvilli, two nuclei, dictyosomes, and large cisternae of the endoplasmic reticulum. Except for the binucleated condition, the cells closely resemble the retinula cells of the copepod nauplius eye.

It is concluded that, because of its independent position, the new photoreceptor is not a detached part of the nauplius eye. As there are no accessory... (More)
A new photoreceptor in the Copepoda is described. The organ, previously called Gicklhorn's organ (Elofsson, 1966a), is paired and is usually situated beneath the cuticle of the front. Each member of the pair consists of two cells. From the anterolateral position, two nerves lead to the lateral part of the brain. No connexion with the nauplius eye is found. Each cell of the organ has microvilli, two nuclei, dictyosomes, and large cisternae of the endoplasmic reticulum. Except for the binucleated condition, the cells closely resemble the retinula cells of the copepod nauplius eye.

It is concluded that, because of its independent position, the new photoreceptor is not a detached part of the nauplius eye. As there are no accessory structures present and no missing links so far known, it is doubtful whether it can be regarded as a vestigial compound eye. The most plausible hypothesis is that the new presumed photoreceptor is an independent structure without connexions either with crustacean compound or nauplius eyes.

If the function of the nauplius eye is considered by itself the improvement contributed by the new organ is probably modest because of its low level of organization. Some experimental evidence on light reception in Copepods points to a possible function in response to directed light.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Crustacea, Copepoda, Gicklhorn's organ
in
Zeitschrift für Zellforschung und mikroskopische Anatomie1948-01-01+01:001974-01-01+01:00
volume
109
issue
3
pages
316 - 326
publisher
Springer Verlag
external identifiers
  • scopus:0014716662
DOI
10.1007/BF02226905
language
English
LU publication?
yes
id
6ab81104-a01c-4bd3-bb41-32a4a94b5049
date added to LUP
2016-12-03 16:09:51
date last changed
2017-04-05 16:29:29
@article{6ab81104-a01c-4bd3-bb41-32a4a94b5049,
  abstract     = {A new photoreceptor in the Copepoda is described. The organ, previously called Gicklhorn's organ (Elofsson, 1966a), is paired and is usually situated beneath the cuticle of the front. Each member of the pair consists of two cells. From the anterolateral position, two nerves lead to the lateral part of the brain. No connexion with the nauplius eye is found. Each cell of the organ has microvilli, two nuclei, dictyosomes, and large cisternae of the endoplasmic reticulum. Except for the binucleated condition, the cells closely resemble the retinula cells of the copepod nauplius eye.<br/><br/>It is concluded that, because of its independent position, the new photoreceptor is not a detached part of the nauplius eye. As there are no accessory structures present and no missing links so far known, it is doubtful whether it can be regarded as a vestigial compound eye. The most plausible hypothesis is that the new presumed photoreceptor is an independent structure without connexions either with crustacean compound or nauplius eyes.<br/><br/>If the function of the nauplius eye is considered by itself the improvement contributed by the new organ is probably modest because of its low level of organization. Some experimental evidence on light reception in Copepods points to a possible function in response to directed light.<br/>},
  author       = {Elofsson, Rolf},
  keyword      = {Crustacea,Copepoda,Gicklhorn's organ},
  language     = {eng},
  number       = {3},
  pages        = {316--326},
  publisher    = {Springer Verlag},
  series       = {Zeitschrift für Zellforschung und mikroskopische Anatomie1948-01-01+01:001974-01-01+01:00},
  title        = {A presumed new photoreceptor in copepod crustaceans.},
  url          = {http://dx.doi.org/10.1007/BF02226905},
  volume       = {109},
  year         = {1970},
}