Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

The Ultrastructure of the Sensory Dorsal Organ of Crustacea1)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Crustaceana

The present study compares the ultrastructure of "dorsal organs" on the anterior, dorsal carapace of the syncarid Anaspides tasmaniae and the crangonid shrimp Crangon crangon. Although the species are not closely related phylogenetically, and the elements of their dorsal organs are arranged differently, they are remarkably similar ultrastructurally. The common elements include an island of thinner epicuticle lying across the aperture of a hole through the surrounding cuticle, squarish in the case of Anaspides, and lozenge shaped in Crangon. This whole area appears to be flexible. At the centre of the thin region is a tabular invagination of cuticle ending blindly in Anaspides and with a pore at the bottom in Crangon. The tube is surrounded by a single large cell with extensive internal membranes and basal vacuoles or vesicles. This part of the organ is not innervated. Four small papillae are disposed about this central region, in quincunx formation in Anaspides, and a pair each side in a row in Crangon. The cuticle thins further over the papillae and the underside is closely associated with four sensory dendrites so that each organ is innervated by a total of sixteen neurons. The four dendrites beneath each papilla have basal bodies and cilliary microtubules typical of mechanosensors. The region close to the tips of the dendrites is surrounded by non-cellular material and the dendrites are separated from each other by a series of sheath cells. On the basis of this similarity, and because the relationship between these elements, as evidenced by studies of the external structure across a wide range of taxa, is strongly conserved, we propose that the organs described here belong to a particular class of "dorsal organs" which we call sensory dorsal organs (of Laverack). On the basis of the ultrastructure, and the conservation of the proximity of

Affiliations: 1: The Gatty Marine Laboratory, The University, St. Andrews KY16 8LB, Scotland, U.K.; 2: Department of Zoology, University of Melbourne, Parkville, Victoria 3052, Australia

Loading

Full text loading...

/content/journals/10.1163/156854096x00646
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/156854096x00646
Loading

Article metrics loading...

/content/journals/10.1163/156854096x00646
1996-01-01
2016-12-10

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Crustaceana — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation