The ultrastructure of a chemoreceptor organ in the head of copepod crustaceans
(1971) In Acta Zoologica 52. p.299-315- Abstract
- The ultrastructure of the paired nerves, previously called frontal organ
or X-organ, in copepod crustaceans was investigated. These nerves, run-
ning from the anterior margin of the brain to the frontal edge of the
animals, are found to contain the dendrites of three types of morpho-
logically different sensory neurons. The first unit consists of two dendrites
(distinguished by their myelinization) leading to two small hairs on the
front. Their detailed structure was not investigated. The second unit
consists of a few large dendrites ending in b’ranching cilia. The latter
are surrounded by a specialized glial cell. The ciliary branches are reg-... (More) - The ultrastructure of the paired nerves, previously called frontal organ
or X-organ, in copepod crustaceans was investigated. These nerves, run-
ning from the anterior margin of the brain to the frontal edge of the
animals, are found to contain the dendrites of three types of morpho-
logically different sensory neurons. The first unit consists of two dendrites
(distinguished by their myelinization) leading to two small hairs on the
front. Their detailed structure was not investigated. The second unit
consists of a few large dendrites ending in b’ranching cilia. The latter
are surrounded by a specialized glial cell. The ciliary branches are reg-
ularly sized and arranged. The third unit consists of c. 17 dendrites
ending with cilia at the cuticle. The cilia are split into irregular branches
which are buried in modified epidermal cells which, in the case of
Calanus, are connected with cuticular pores.
By analogy with other presumed chemosensory organs in the Arthro-
poda, the second and the third unit are considered, on a morphological
basis, to be chemoreceptors. The second unit receives internal stimuli.
Because it resembles other X-organs in the Crustacea, all X-organs could
have the same function. The third unit is thought of as receiving external
stimuli.
(Less)
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- author
- Elofsson, Rolf LU
- organization
- publishing date
- 1971
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Acta Zoologica
- volume
- 52
- pages
- 299 - 315
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:0009333728
- DOI
- 10.1111/j.1463-6395.1971.tb00565.x
- language
- English
- LU publication?
- yes
- id
- 13fc50b4-90d6-4efa-b20a-f4878437cf3b
- date added to LUP
- 2016-12-03 12:47:35
- date last changed
- 2021-01-03 06:53:58
@article{13fc50b4-90d6-4efa-b20a-f4878437cf3b, abstract = {{The ultrastructure of the paired nerves, previously called frontal organ <br/>or X-organ, in copepod crustaceans was investigated. These nerves, run- <br/>ning from the anterior margin of the brain to the frontal edge of the <br/>animals, are found to contain the dendrites of three types of morpho- <br/>logically different sensory neurons. The first unit consists of two dendrites <br/>(distinguished by their myelinization) leading to two small hairs on the <br/>front. Their detailed structure was not investigated. The second unit <br/>consists of a few large dendrites ending in b’ranching cilia. The latter <br/>are surrounded by a specialized glial cell. The ciliary branches are reg- <br/>ularly sized and arranged. The third unit consists of c. 17 dendrites <br/>ending with cilia at the cuticle. The cilia are split into irregular branches <br/>which are buried in modified epidermal cells which, in the case of <br/>Calanus, are connected with cuticular pores. <br/>By analogy with other presumed chemosensory organs in the Arthro- <br/>poda, the second and the third unit are considered, on a morphological <br/>basis, to be chemoreceptors. The second unit receives internal stimuli. <br/>Because it resembles other X-organs in the Crustacea, all X-organs could <br/>have the same function. The third unit is thought of as receiving external <br/>stimuli. <br/>}}, author = {{Elofsson, Rolf}}, language = {{eng}}, pages = {{299--315}}, publisher = {{Wiley-Blackwell}}, series = {{Acta Zoologica}}, title = {{The ultrastructure of a chemoreceptor organ in the head of copepod crustaceans}}, url = {{http://dx.doi.org/10.1111/j.1463-6395.1971.tb00565.x}}, doi = {{10.1111/j.1463-6395.1971.tb00565.x}}, volume = {{52}}, year = {{1971}}, }