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Journal of Parasitic Diseases

, Volume 42, Issue 4, pp 582–588 | Cite as

New species of macrocercous and megalurus cercariae infecting the freshwater snail, Paludomus (Paludomus) tanschauricus (Gmelin, 1771) in Malabar, Kerala

  • N. K. Sanil
  • K. P. Janardanan
Original Article
  • 14 Downloads

Abstract

The present paper describes two new species of cercariae infecting the freshwater snail, Paludomus (Paludomus) tanschauricus from Malabar, Kerala. Paludomus tanschauricus collected from the hill streams at Vattakkundu in the Wayanad district of Kerala harboured a macrocercous cercaria, Cercaria sp. XX Malabar n. sp. characterized by a disproportionately large tail. Developmental stages were recovered from the hepatopancreatic tissues of the snail host. Cercariae encysted on the gills of the fish, Haludaria melanampyx. Snails collected from Papanashini rivulet at Thirunelli, also from Waynad district were infected with a megalurous cercaria, Cercaria sp. XXI Malabar n. sp. possessing an elongated tail with an adhesive cup-like sucker at its tip. Redial stages developed in the hepatopancreas while the cercariae were found to encyst on any available substrate. The morphology and morphometry of these two cercariae along with their developmental stages are studied in detail and compared with related species to establish their systematic positions.

Keywords

Macrocercous Megalurous Cercaria Sporocyst Paludomus (Paludomus) tanschauricus Malabar Kerala 

Notes

Acknowledgements

The authors are grateful to the Head, Department of Zoology, University of Calicut for providing necessary facilities. One of the authors (NKS) is grateful to the Council of Scientific and Industrial Research (CSIR) for financial support in the form of a Senior Research Fellowship.

Author’s contribution

Dr. KPJ designed and guided the study. Dr. NKS carried out the survey, collected and studied the cercariae in detail. The manuscript was written by both the authors.

Compliance with ethical standards

All the required ethical standards were complied with.

Conflict of interest

The authors declare that that there is no conflict of interest between them.

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Copyright information

© Indian Society for Parasitology 2018

Authors and Affiliations

  1. 1.Department of ZoologyUniversity of CalicutThenhipalamIndia
  2. 2.Central Marine Fisheries Research InstituteCochinIndia

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