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Pygidiopsis cambodiensis n. sp. (Digenea: Heterophyidae) from experimental hamsters infected with metacercariae in mullets from Cambodia

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Abstract

Pygidiopsis cambodiensis n. sp. is described based on adult flukes recovered from Syrian golden hamsters experimentally infected with metacercariae from mullets (Liza macrolepis) purchased at a local fish market in Phnom Penh, Cambodia. The specimens were examined by light and scanning electron microscopy. Among the 13 species so far assigned to Pygidiopsis, the new species belongs to the summa-type (including Pygidiopsis pelecani, Pygidiopsis phalacrocoracis, Pygidiopsis piclaumoreli, Pygidiopsis plana, and Pygidiopsis summa) which lack circumoral spines and have vitelline follicles extending posteriorly from the level of the ovary some distance into the post-testicular space and the uterus not exceeding the acetabulum anteriorly. The new species differs from the other five species of the summa-type particularly in the morphology of the ventrogenital complex, including the genital sac, gonotyl, and gonotyl spines (= rodlets). The genital sac is well developed, sucker-like, slightly larger than the ventral sucker, muscular, and equipped with two gonotyls on the ventral side of the sac. Gonotyls are protruding pad-like, and the number of rodlets on the left gonotyl is four to five and that on the right gonotyl is 10–11 in two rows. This is the fifth Pygidiopsis species reported in Asia, following P. summa (Japan, Korea, and Vietnam), P. phalacrocorasis (Japan), P. pelecani (China), and Pygidiopsis marivillai (Philippines).

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Acknowledgments

We are grateful to Dr. Sinuon Muth and Dr. Duong Socheat, Center for Parasitology, Entomology, and Malaria Control, Phnom Penh, Cambodia, who invited us to Cambodia on the occasion of Korea–Cambodia International Collaboration on Intestinal Parasite Control in Cambodia (2006–2011). We also appreciate the staff of Korea Association of Health Promotion who helped this study.

Conflict of interest

The authors declare that they have no conflict of interest related to this study.

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Authors and Affiliations

  1. Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, Republic of Korea

    Woon-Mok Sohn

  2. Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea

    Deok-Gyu Kim, Bong-Kwang Jung, Jaeeun Cho & Jong-Yil Chai

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  1. Woon-Mok Sohn
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  2. Deok-Gyu Kim
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  3. Bong-Kwang Jung
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  4. Jaeeun Cho
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  5. Jong-Yil Chai
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Correspondence to Jong-Yil Chai.

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Sohn, WM., Kim, DG., Jung, BK. et al. Pygidiopsis cambodiensis n. sp. (Digenea: Heterophyidae) from experimental hamsters infected with metacercariae in mullets from Cambodia. Parasitol Res 115, 123–130 (2016). https://doi.org/10.1007/s00436-015-4727-1

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