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Two new gonad-infecting species of Philometra (Nematoda: Philometridae) parasitic in Lutjanus spp. (Osteichthyes: Lutjanidae) in the Bay of Bengal, India

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Abstract

Based on light and scanning electron microscopical studies, two new gonad-infecting species of Philometra Costa, 1845 (Nematoda: Philometridae) are described from marine fishes of the genus Lutjanus Bloch (Lutjanidae, Perciformes) in the Bay of Bengal, off the eastern coast of India: Philometra argentimaculati sp. n. and Philometra fulvi sp. n. from the mangrove red snapper Lutjanus argentimaculatus (Forsskål) and blacktail snapper Lutjanus fulvus (Foerster), respectively. P. argentimaculati is mainly characterised by the body length of male 2.56–3.07 mm, needle-like spicules 183–228 μm long, length of the gubernaculum at 90–120 μm, distal end of the gubernaculum with lamellar structures without a dorsal protuberance and by the dorsally non-interrupted male caudal mound. P. fulvi differs from all Philometra spp. with described males in the rectangular shape of the distal tip of the gubernaculum and is noted for the length of needle-like spicules 123–138 μm, that of the gubernaculum 69–93 μm and for the presence of a dorsal protuberance and lamella-like structures on the gubernaculum distal end. These are the first nominal species of philometrids reported from fishes of the family Lutjanidae in the region of the Indian Ocean. A necessity of further detailed studies on philometrids parasitising marine fishes worlwide is stressed.

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Acknowledgments

The authors would like to express their gratitude to Prof. Dr. K. Kathiresan, Dean and Director, and Prof. Dr. T. Balasubramanian, former Dean and Director, Faculty of Marine Sciences for their constant encouragement. The Annamalai University provided facilities during the study period. Thanks are extended to R. Santhanam, Chief Educational Officer, for his help. Authors’ thanks are also due to the staff of the Laboratory of Electron Microscopy, Institute of Parasitology, Biology Centre of the AS CR, České Budějovice for their technical assistance and to Ing. Blanka Škoríková of the same Institute for help with illustrations. This study was partly supported by the Czech Science Foundation (grant no. P505/12/G112) and the Institute of Parasitology, BC AS CR (institutional support RVO: 60077344).

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Authors and Affiliations

  1. Institute of Parasitology, Biology Centre, Academy of Sciences of the Czech Republic, Branišovská 31, 370 05, České Budějovice, Czech Republic

    František Moravec

  2. Faculty of Marine Sciences, Annamalai University, Parangipettai, 806 502, Tamil Nadu, India

    Jayaraman Manoharan

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  1. František Moravec
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  2. Jayaraman Manoharan
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Correspondence to František Moravec.

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Moravec, F., Manoharan, J. Two new gonad-infecting species of Philometra (Nematoda: Philometridae) parasitic in Lutjanus spp. (Osteichthyes: Lutjanidae) in the Bay of Bengal, India. Parasitol Res 113, 3299–3307 (2014). https://doi.org/10.1007/s00436-014-3993-7

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  • DOI: https://doi.org/10.1007/s00436-014-3993-7

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