Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Capsular Protonephridia in Male Oligacanthorhynchus atrata (Acanthocephala)

T. T. Dunagan and R. -M. A. Rashed
The Journal of Parasitology
Vol. 74, No. 1 (Feb., 1988), pp. 180-185
DOI: 10.2307/3282495
Stable URL: http://www.jstor.org/stable/3282495
Page Count: 6
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Capsular Protonephridia in Male Oligacanthorhynchus atrata (Acanthocephala)
Preview not available

Abstract

The capsular type protonephridium and associated excretory bladder for male members of a single species in the genus Oligacanthorhynchus were examined by scanning electron microscopy. These excretory organs consisted of 2 groups of large, blunt, tightly packed flame bulbs covering a capsule-like chamber located on the anterior end of an expandable bladder. The entire complex was located on the dorsal surface at the junction of the dorsal ligament sac and genital sheath. Each protonephridium consisted of approximately 300-400 flame bulbs with the entire complex measuring 0.3-0.4 mm in length by 0.14-0.25 mm wide. Several electron micrographs are presented that show the bladder in different stages of filling. Both the anterior and posterior termini of the bladder appear to be attached to the underlying surfaces. Evidence is presented which suggests that the Oligacanthorhynchidae should be reorganized taking the nephridial type into consideration as a taxonomic characteristic.

Page Thumbnails

  • Thumbnail: Page 
180
    180
  • Thumbnail: Page 
181
    181
  • Thumbnail: Page 
182
    182
  • Thumbnail: Page 
183
    183
  • Thumbnail: Page 
184
    184
  • Thumbnail: Page 
185
    185