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New species of Macropostrongyloides Yamaguti, 1961 (Nematoda: Strongylida) and the redescription of Ma. baylisi (Wood, 1930) from Australian macropodid marsupials

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Specimens of four genetically distinct groups of Macropostrongyloides baylisi Wood, 1930 were analysed morphologically. Each genotype was found to represent a morphologically distinct species: Ma. baylisi from Osphranter robustus woodwardi (Thomas) and Osphranter robustus erubescens (Sclater); Ma. spearei n. sp. from Osphranter robustus robustus (Gould) and O. r. erubescens; Ma. mawsonae n. sp. from Macropus giganteus Shaw and Ma. woodi n. sp. from Osphranter rufus (Desmarest). The new species described here are differentiated primarily by several male-specific features that have been overlooked in previous taxonomic revisions. These features include striations on the terminal part of the spicule ala, the papillae surrounding the genital cone and the bursal striations. Furthermore, scanning electron photomicrographs have revealed greater details of previously undefined structures within the buccal cavity that warrant further investigations.

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We would like to thank Dr Allison van de Meena from the Biosciences Microscopy unit, Melbourne University for her advice and assistance with the scanning electron microscopy. This study was financially supported by the Australian Biological Resources Study grants RF217–06 and CBG18–07.

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Correspondence to Tanapan Sukee.

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Specimens were collected under the following state-issued permits: Victorian Department of Sustainability and Environment 90-053, 93-016, 10000434, 100003649; Queensland National Parks and Wildlife Service T00436, T1131, Queensland Department of Environment and Heritage Protection WA 00006125, the Northern Territory Department of Primary Industry 15747, the Western Australian Department of Environment and Conservation SF007407 and the South Australian Department of Environment and Heritage EO7358.

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Sukee, T., Beveridge, I. & Jabbar, A. New species of Macropostrongyloides Yamaguti, 1961 (Nematoda: Strongylida) and the redescription of Ma. baylisi (Wood, 1930) from Australian macropodid marsupials. Syst Parasitol 97, 267–284 (2020).

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