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Acta Parasitologica

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Volume 61, Issue 4

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A morphological study of Diplodiscus subclavatus (Pallas, 1760) (Trematoda: Diplodiscidae) adults from the accidental host, Viviparus contectus (Millet, 1813) (Caenogastropoda: Viviparidae)

Anna Cichy
  • Corresponding author
  • Department of Invertebrate Zoology, Faculty of Biology and Environment Protection, Nicolaus Copernicus University in Torun, Lwowska 1, 87–100 Torun, Poland
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/ Elżbieta Żbikowska
  • Department of Invertebrate Zoology, Faculty of Biology and Environment Protection, Nicolaus Copernicus University in Torun, Lwowska 1, 87–100 Torun, Poland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2016-10-24 | DOI: https://doi.org/10.1515/ap-2016-0119

Abstract

A phenomenon of switching of the parasite in the food chain to an accidental host is commonly observed in nature. However, there is little available data concerning the morphological descriptions of parasites that passively get into the atypical hosts and are capable, at least to some degree, of somatic growth and development of reproductive structures. A morphological survey of Diplodiscus subclavatus (Pallas, 1760) adults isolated from a digestive tract of an accidental host, Viviparus contectus (Millet, 1813), was carried out. Diplodiscus subclavatus individuals identified in prosobranch snails were morphologically similar to adult forms of the parasite described from amphibians, typical final hosts in the life cycle of this paramphistomid. The observed forms of D. subclavatus had a fully developed reproductive system, sperm in the seminal vesicle and oocytes in the ovary. The number of eggs in the uterus ranged from 3 to 17. Our research indicates that D. subclavatus individuals reach the sexual maturity in the accidental, invertebrate hosts.

Keywords: Diplodiscus subclavatus; adults; morphology; accidental host; Viviparus contectus

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About the article

Received: 2016-04-07

Revised: 2016-07-12

Accepted: 2016-07-13

Published Online: 2016-10-24

Published in Print: 2016-12-01


Citation Information: Acta Parasitologica, Volume 61, Issue 4, Pages 859–862, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2016-0119.

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