<abstract xmlns="http://www.w3.org/1999/xhtml"><p>A new nematode species, <italic>Heliconema monopteri</italic> n. sp. (Physalopteridae), is described from the stomach and intestine of the freshwater fish <italic>Monopterus cuchia</italic> (Hamilton) (Synbranchidae) in Bijnor district, Uttar Pradesh, India. It is mainly characterized by the lengths of spicules (468 – 510 µm and 186 – 225 µm), the postequatorial vulva without elevated lips, the presence of pseudolabial lateroterminal depressions and by the number and arrangement of caudal papillae. This is the first representative of the genus reported from a synbranchiform fish. Another new congeneric species, <italic>Heliconema pisodonophidis</italic> n. sp. is established based on a re-examination of nematodes previously reported as <italic>H</italic>. <italic>longissimum</italic> (Ortlepp, 1922) from <italic>Pisodonophis boro</italic> (Hamilton) (Ophichthidae) in Thailand; ovoviviparity in this species is a unique feature among all physalopterids. <italic>Heliconema hamiltonii</italic> Bilqees et Khanum, 1970 is designated as a <italic>species dubia</italic> and the nematodes previously reported as <italic>H</italic>. <italic>longissimum</italic> from <italic>Mastacembelus armatus</italic> (Lacépède) in India are considered to belong to <italic>H</italic>. <italic>kherai</italic> Gupta et Duggal, 1989. A key to species of <italic>Heliconema</italic> Travassos, 1919 is provided.</p></abstract>

A new nematode species, Heliconema monopteri n. sp. (Physalopteridae), is described from the stomach and intestine of the freshwater fish Monopterus cuchia (Hamilton) (Synbranchidae) in Bijnor district, Uttar Pradesh, India. It is mainly characterized by the lengths of spicules (468 – 510 µm and 186 – 225 µm), the postequatorial vulva without elevated lips, the presence of pseudolabial lateroterminal depressions and by the number and arrangement of caudal papillae. This is the first representative of the genus reported from a synbranchiform fish. Another new congeneric species, Heliconema pisodonophidis n. sp. is established based on a re-examination of nematodes previously reported as H. longissimum (Ortlepp, 1922) from Pisodonophis boro (Hamilton) (Ophichthidae) in Thailand; ovoviviparity in this species is a unique feature among all physalopterids. Heliconema hamiltonii Bilqees et Khanum, 1970 is designated as a species dubia and the nematodes previously reported as H. longissimum from Mastacembelus armatus (Lacépède) in India are considered to belong to H. kherai Gupta et Duggal, 1989. A key to species of Heliconema Travassos, 1919 is provided.

<italic>Heliconema monopteri</italic> n. sp. (Nematoda: Physalopteridae) from <italic>Monopterus cuchia</italic> (Hamilton) (Osteichthyes: Synbranchidae) in India, with notes on the taxonomy of <italic>Heliconema</italic> spp.

Institute of Parasitology, Biology Centre, Czech Academy of Sciences (CAS)

Helminthologia

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 n. sp. (Nematoda: Physalopteridae) from  (Hamilton) (Osteichthyes: Synbranchidae) in India, with notes on the taxonomy of  spp.

A new nematode species, Heliconema monopteri n. sp. (Physalopteridae), is described from the stomach and intestine of the freshwater fish Monopterus cuchia...

Heliconema monopteri n. sp. (Nematoda: Physalopteridae) from Monopterus cuchia (Hamilton) (Osteichthyes: Synbranchidae) in India, with notes on the taxonomy of Heliconema spp.

Published Online: May 04, 2019

Page range: 124 - 131

Received: Dec 11, 2018

Accepted: Jan 17, 2019

DOI: https://doi.org/10.2478/helm-2019-0002

Keywords
parasitic nematode, Physalopteroidea, new species, freshwater fish, Synbranchiformes, South Asia

© 2019 F. Moravec et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Heliconema monopteri n. sp. (Nematoda: Physalopteridae) from Monopterus cuchia (Hamilton) (Osteichthyes: Synbranchidae) in India, with notes on the taxonomy of Heliconema spp.

Published Online: May 04, 2019

Page range: 124 - 131

Received: Dec 11, 2018

Accepted: Jan 17, 2019

DOI: https://doi.org/10.2478/helm-2019-0002

Keywordsparasitic nematode, Physalopteroidea, new species, freshwater fish, Synbranchiformes, South Asia

© 2019 F. Moravec et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
parasitic nematode, Physalopteroidea, new species, freshwater fish, Synbranchiformes, South Asia