BioOne.org will be down briefly for maintenance on 17 December 2024 between 18:00-22:00 Pacific Time US. We apologize for any inconvenience.
How to translate text using browser tools
1 October 2007 STRUCTURE OF THE PHARYNX IN THE ADULT NEMATODE ANGUILLICOLOIDES CRASSUS (NEMATODA: RHABDITIDA)
Magdaléna Bruňanská, Hans-Peter Fagerholm, František Moravec
Author Affiliations +
Abstract

The structure of the pharynx of the adult female nematode Anguillicoloides crassus (Spirurina) has been studied for the first time using light and transmission electron microscopy. The cylindrical pharynx consists of a short anterior muscular corpus and an enlarged posterior glandular and muscular postcorpus. The main cellular components of the pharynx of A. crassus include the muscle cells, the marginal cells, the nerve cells, and 1 dorsal and 2 subventral glands. New observations for nematodes include: (1) the non-contractile regions of pharyngeal musculature in the corpus have specific appearance; (2) the ventrosublateral longitudinal nerve in the pharynx has an enlarged, enucleated anterior part, with a pronounced palmate projections; and (3) abundant lysosomelike membranous bodies consisting of myelinlike figures of varied size present in marginal cells and pharyngointestinal valve. The 2 subventral glands and, apparently, the single dorsal gland, have their openings at the same level, i.e., at the border between the corpus and postcorpus. The pharyngeal–intestinal valve joins the pharynx to the intestine. Knowledge of the ultrastructure of these complex characters may be useful in understanding of functional features, and for comparative morphology as well as evolutionary considerations within the Chromadorea.

Magdaléna Bruňanská, Hans-Peter Fagerholm, and František Moravec "STRUCTURE OF THE PHARYNX IN THE ADULT NEMATODE ANGUILLICOLOIDES CRASSUS (NEMATODA: RHABDITIDA)," Journal of Parasitology 93(5), 1017-1028, (1 October 2007). https://doi.org/10.1645/GE-1127R.1
Received: 23 November 2006; Accepted: 1 April 2007; Published: 1 October 2007
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top