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Morphological and molecular characterization of Megalobatrachonema hainanensis sp. nov. (Nematoda: Ascaridida), with phylogenetic position of Megalobatrachonema in Cosmocercoidea

Published online by Cambridge University Press:  04 December 2018

H.-X. Chen ,
L.-P. Zhang  and
L. Li Open the ORCID record for L. Li [Opens in a new window]
H.-X. Chen
Affiliation:
Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Sciences, Hebei Normal University, 050024 Shijiazhuang, Hebei Province, People's Republic of China
L.-P. Zhang
Affiliation:
Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Sciences, Hebei Normal University, 050024 Shijiazhuang, Hebei Province, People's Republic of China
L. Li*
Affiliation:
Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Sciences, Hebei Normal University, 050024 Shijiazhuang, Hebei Province, People's Republic of China
*
Author for correspondence: L. Li, E-mail: liangliangex369@126.com
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Abstract

The genus Megalobatrachonema is a rare group of nematode parasites within Ascaridida. The systematic status of Megalobatrachonema in the superfamily Cosmocercoidea (Ascaridida) has long been controversial. The relationship of Megalobatrachonema and Chabaudgolvania remains unsolved. In the present study, a new species of Megalobatrachonema, M. hainanensis sp. nov., was described based on specimens collected in Amolops hainanensis (Boulenger) and Hylarana spinulosa (Smith) (Amphibia: Anura) from Hainan Island, China. The large ribosomal DNA (28S) and internal transcribed spacer (ITS1-5.8S-ITS2) were also sequenced for molecular identification and phylogenetic study. Phylogenetic analyses using maximum likelihood (ML) inference and Bayesian inference (BI) based on 28S and ITS1 sequence data, respectively, supported that Megalobatrachonema is a member of the family Kathlaniidae. In addition, the genetic comparison and phylogenetic results based on ITS1 sequence data also supported that the genus Chabaudgolvania should be considered as a synonym of Megalobatrachonema.

Keywords

AscarididaChinafrogintegrated taxonomyphylogeny
Type
Research Paper
Information
Journal of Helminthology , Volume 94 , 2020 , e19
Copyright
Copyright © Cambridge University Press 2018 

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