Tags

Type your tag names separated by a space and hit enter

Surface ultrastructural characteristics of Dictyocotyle coeliaca Nybelin, 1941 (Monopisthocotylea: Monocotylidae), an endoparasitic monogenean of rays.
Parasitol Res 2016; 115(3):965-73PR

Abstract

Scanning and transmission electron microscopical observations were made of the surface topography of Dictyocotyle coeliaca (Nybelin, 1941) (Monopisthocotylea: Monocotylidae), a unique endoparasitic monogenean from the body cavity of the ray Amblyraja radiata (Elasmobranchii: Rajidae). Scanning investigation show the presence on the ventral side of the anterior body of smooth areas with pit-like depressions and shallow ridges, whereas the tegument of the middle and posterior regions of the body is extensively folded, and on the dorsal surface the tegument is smooth but interrupted by deep depressions. Transmission observation revealed the presence of invaginations of varying irregularity and depth, which form the various depressions of the tegumental surface. Non-ciliated, dome-shaped papillae occur singly or in groups and are common around the mouth and both the genital and vaginal pores, but exhibit no particular orientation. The haptor is much reduced, compared with that of ectoparasitic monocotylids, and is covered ventrally with an irregular array of 40-70 shallow loculi. Internal differences occur in the thickness of the syncytial tegumentary layer of the haptoral loculi and septa and also in the number of cytoplasmic inclusions. The locular surface has distinct ultrastructural characteristics, the most obvious of which are a honeycomb arrangement of small pockets measuring 0.6 × 0.75 to 1.0 × 1.7 μm in diameter, a terminal web beneath the surface plasma membrane and large outgrowths on the surface of the loculi filled with lysosome-like bodies. The surface specializations of the body and haptoral tegument of D. coeliaca are discussed in relation to their being adaptations to an endoparasitic environment.

Authors+Show Affiliations

I. D. Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, 152742, Borok, Yaroslavl Province, Russia. poddubny@ibiw.yaroslavl.ru.Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, University of Tromsø, 9037, Tromsø, Norway.Department of Life Sciences, Natural History Museum, Cromwell Road, London, SW7 5BD, UK.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26614359

Citation

Poddubnaya, Larisa G., et al. "Surface Ultrastructural Characteristics of Dictyocotyle Coeliaca Nybelin, 1941 (Monopisthocotylea: Monocotylidae), an Endoparasitic Monogenean of Rays." Parasitology Research, vol. 115, no. 3, 2016, pp. 965-73.
Poddubnaya LG, Hemmingsen W, Gibson DI. Surface ultrastructural characteristics of Dictyocotyle coeliaca Nybelin, 1941 (Monopisthocotylea: Monocotylidae), an endoparasitic monogenean of rays. Parasitol Res. 2016;115(3):965-73.
Poddubnaya, L. G., Hemmingsen, W., & Gibson, D. I. (2016). Surface ultrastructural characteristics of Dictyocotyle coeliaca Nybelin, 1941 (Monopisthocotylea: Monocotylidae), an endoparasitic monogenean of rays. Parasitology Research, 115(3), pp. 965-73. doi:10.1007/s00436-015-4823-2.
Poddubnaya LG, Hemmingsen W, Gibson DI. Surface Ultrastructural Characteristics of Dictyocotyle Coeliaca Nybelin, 1941 (Monopisthocotylea: Monocotylidae), an Endoparasitic Monogenean of Rays. Parasitol Res. 2016;115(3):965-73. PubMed PMID: 26614359.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Surface ultrastructural characteristics of Dictyocotyle coeliaca Nybelin, 1941 (Monopisthocotylea: Monocotylidae), an endoparasitic monogenean of rays. AU - Poddubnaya,Larisa G, AU - Hemmingsen,Willy, AU - Gibson,David I, Y1 - 2015/11/28/ PY - 2015/08/31/received PY - 2015/11/10/accepted PY - 2015/11/29/entrez PY - 2015/11/29/pubmed PY - 2016/10/25/medline KW - Dictyocotyle coeliaca KW - Endoparasitic Monogenea KW - Haptor KW - Monocotylidae KW - Scanning electron microscopy KW - Surface topography KW - Tegument KW - Transmission electron microscopy KW - Ultrastructure SP - 965 EP - 73 JF - Parasitology research JO - Parasitol. Res. VL - 115 IS - 3 N2 - Scanning and transmission electron microscopical observations were made of the surface topography of Dictyocotyle coeliaca (Nybelin, 1941) (Monopisthocotylea: Monocotylidae), a unique endoparasitic monogenean from the body cavity of the ray Amblyraja radiata (Elasmobranchii: Rajidae). Scanning investigation show the presence on the ventral side of the anterior body of smooth areas with pit-like depressions and shallow ridges, whereas the tegument of the middle and posterior regions of the body is extensively folded, and on the dorsal surface the tegument is smooth but interrupted by deep depressions. Transmission observation revealed the presence of invaginations of varying irregularity and depth, which form the various depressions of the tegumental surface. Non-ciliated, dome-shaped papillae occur singly or in groups and are common around the mouth and both the genital and vaginal pores, but exhibit no particular orientation. The haptor is much reduced, compared with that of ectoparasitic monocotylids, and is covered ventrally with an irregular array of 40-70 shallow loculi. Internal differences occur in the thickness of the syncytial tegumentary layer of the haptoral loculi and septa and also in the number of cytoplasmic inclusions. The locular surface has distinct ultrastructural characteristics, the most obvious of which are a honeycomb arrangement of small pockets measuring 0.6 × 0.75 to 1.0 × 1.7 μm in diameter, a terminal web beneath the surface plasma membrane and large outgrowths on the surface of the loculi filled with lysosome-like bodies. The surface specializations of the body and haptoral tegument of D. coeliaca are discussed in relation to their being adaptations to an endoparasitic environment. SN - 1432-1955 UR - https://www.unboundmedicine.com/medline/citation/26614359/Surface_ultrastructural_characteristics_of_Dictyocotyle_coeliaca_Nybelin,_1941_(Monopisthocotylea:_Monocotylidae),_an_endoparasitic_monogenean_of_rays L2 - https://dx.doi.org/10.1007/s00436-015-4823-2 DB - PRIME DP - Unbound Medicine ER -