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A new monozoic tapeworm, Lobulovarium longiovatum n. g., n. sp. (Cestoda: Caryophyllidea), from barbs Puntius spp. (Teleostei: Cyprinidae) in the Indomalayan region

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Abstract

A new caryophyllidean cestode is described from barbs Puntius spp. (Cypriniformes: Cyprinidae), with P. sophore (Hamilton) as its type-host, in the Ganges and Brahmaputra river basins in India and Bangladesh, and a new genus, Lobulovarium n. g., is proposed to accommodate it. The genus belongs to the Lytocestidae because its vitelline follicles are situated in the cortex. It is typified by: (i) a peculiar ovary, which is roughly H-shaped, but with asymmetrical, irregular lobes on its ventral and dorsal sides; (ii) an extensive vitellarium formed by numerous vitelline follicles scattered throughout the cortex; (iii) a long, conical postovarian part of the body with numerous vitelline follicles; (iv) a broadly digitate scolex with a slightly protrusible central cone; (v) a single gonopore (male and female genital ducts open via a single pore and a common genital atrium is absent); and (vi) a small number of testes (< 60). Molecular data (partial sequences of the lsrDNA) indicate that Lobulovarium longiovatum n. sp. belongs among the most basal caryophyllidean cestodes, being unrelated to species from siluriform catfishes in the Indomalayan region. Paracaryophyllaeus osteobramensis (Gupta & Sinha, 1984) Hafeezullah, 1993 (syn. Pliovitellaria osteobramensis Gupta & Sinha, 1984) from another cyprinid fish, Osteobrama cotio (Hamilton), in Uttar Pradesh, India, is tentatively transferred to Lobulovarium as L. osteobramense (Gupta & Sinha, 1984) n. comb. It differs from L. longiovatum by having much smaller eggs (length <50 μm versus >90 μm in L. longiovatum), which are spherical (length/width ratio 1:1 versus 2.5–3:1 in the new species), and the presence of vitelline follicles alongside the ovarian lobes (almost completely absent in L. longiovatum).

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Acknowledgements

The authors express their gratitude to John S. Mackiewicz (State University of New York at Albany) for helpful suggestions, and to Mostafa A. R. Hossain and his co-workers from the Faculty of Fisheries, Bangladesh Agricultural University in Mymensingh, Bangladesh and Andrew P. Shinn (University of Stirling, UK) for the perfect organisation of a collecting trip to northern Bangladesh during March, 2011 and help with the examination of fishes. The authors are also obliged to: Martina Borovková, Blanka Škoríková and Martina Tesařová (all from the Institute of Parasitology, České Budějovice) for excellent technical help; and Alain de Chambrier (Natural History Museum, Geneva, Switzerland), who stained and mounted the holotype of L. longiovatum. This study was partly based on a PhD thesis of one of the authors (A.A.), who expresses his gratitude to Gopal Goswami for immense help during a field trip to Siliguri. The stays of two of the authors (A.A. and T.S.) in India during 2009 and 2011 were realised under the Indian National Science Academy (INSA) – Academy of Sciences of the Czech Republic (ASCR) Bilateral Exchange Programme. Collecting trips in West Bengal during March, 2009 and in West Bengal and Assam during 2011 were financially and logistically supported by Jhargram Raj College at Jhargram, Paschim Medinipur, West Bengal. Special thanks are due to Debnarayan Roy (Jhargram Raj College), Tinkori Bhuin, Amritendu Mondal, Debsekhar Nath, Sanatan Murmu and Sourav Sarkar for invaluable help during sampling and the parasitological examination of the fishes. This study was financially supported by the Institute of Parasitology, České Budějovice (Z60220518), Czech Science Foundation (Projects Nos 524/08/0885, P505/12/G112 and 206/09/H026), the Slovak Research and Development Agency (Nos LPP-0171-09 and APW-0653-11), the Grant Agency VEGA (No. 2/0129/12), Centre of Excellence for Parasitology (EU – Code ITMS: 26220120022), and the National Science Foundation, USA (PBI award Nos 0818696 and 0818823).

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

    Mikuláš Oros, Anirban Ash, Jan Brabec & Tomáš Scholz

  2. Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic

    Anirban Ash, Jan Brabec & Tomáš Scholz

  3. Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 04001, Košice, Slovakia

    Mikuláš Oros

  4. Jhargram Raj College, Jhargram, Paschim Medinipur, 721507, India

    Pradip Kumar Kar

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  1. Mikuláš Oros
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Correspondence to Tomáš Scholz.

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Oros, M., Ash, A., Brabec, J. et al. A new monozoic tapeworm, Lobulovarium longiovatum n. g., n. sp. (Cestoda: Caryophyllidea), from barbs Puntius spp. (Teleostei: Cyprinidae) in the Indomalayan region. Syst Parasitol 83, 1–13 (2012). https://doi.org/10.1007/s11230-012-9367-6

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