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Acta Parasitologica

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Volume 61, Issue 1 (Jan 2016)

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The morphology of free-living stages and immature parasites of Rhabdias paraensis (Nematoda: Rhabdiasidae), a parasite of Rhinella marina (Anura: Bufonidae) in Brazil

Francisco Tiago de Vasconcelos Melo
  • Laboratório de Biologia Celular e Helmintologia Prof. Dr. Reinalda Marisa Lanfredi, Instituto de Ciências Biológicas, Universidade Federal do Pará, Av. Augusto Correa s/n, 66075-110 Belém, PA, Brasil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Luciana de Cássia Silva do Nascimento
  • Laboratório de Biologia Celular e Helmintologia Prof. Dr. Reinalda Marisa Lanfredi, Instituto de Ciências Biológicas, Universidade Federal do Pará, Av. Augusto Correa s/n, 66075-110 Belém, PA, Brasil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Lilian Cristina Macedo
  • Laboratório de Biologia Celular e Helmintologia Prof. Dr. Reinalda Marisa Lanfredi, Instituto de Ciências Biológicas, Universidade Federal do Pará, Av. Augusto Correa s/n, 66075-110 Belém, PA, Brasil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Jeannie Nascimento dos Santos
  • Laboratório de Biologia Celular e Helmintologia Prof. Dr. Reinalda Marisa Lanfredi, Instituto de Ciências Biológicas, Universidade Federal do Pará, Av. Augusto Correa s/n, 66075-110 Belém, PA, Brasil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Yuriy Kuzmin
  • Corresponding author
  • Department of Parasitology, I. I. Schmalhausen Institute of Zoology, NAS of Ukraine; 15 Bogdan Khmelnytskyi Street, Kyiv, 01601, Ukraine
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2015-12-30 | DOI: https://doi.org/10.1515/ap-2016-0004

Abstract

Rhabdias paraensis Santos, Melo, Nascimento, Nascimento, Giese et Furtado, 2011 was described based on fully gravid worms. Further investigations on the free-living stages, immature worms and young individuals were facilitated by cultivation in the laboratory, which allowed us to add new information about the morphology and development of the species. Observations on the free-living development of R. paraensis showed that the life cycle is typical of Rhabdias, with alternation of gonochoristic and hermaphroditic generations and without homogony. Males of the free-living generation were different from those in several species of the genus studied previously. In the original description, the excretory glands and duct were absent in gravid specimens of R. paraensis, while in this study, distinct excretory glands and a duct were observed in immature and young individuals. Additionally, we recognised the separation of the buccal capsule walls into anterior and posterior portions and described the specific shapes of these portions in lateral and apical view. Studies on the morphology and development of free-living stages of Rhabdias spp. from Neotropical regions may provide additional information for species determination.

Keywords : Amazon; Rhinella marina; Rhabdiasidae; free-living generation; immature hermaphrodites

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About the article

Received: 2015-05-24

Revised: 2015-06-22

Accepted: 2015-08-25

Published Online: 2015-12-30

Published in Print: 2016-01-01


Citation Information: Acta Parasitologica, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2016-0004.

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[1]
Yuriy Kuzmin, Francisco Tiago de Vasconcelos Melo, Heriberto Figueira da Silva Filho, and Jeannie Nascimento dos Santos
Folia Parasitologica, 2016, Volume 63

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