Native species Maxvachonia chabaudi Mawson, 1972 (Nematoda: Cosmocercoidea) found in the invasive marine toad Rhinella marina (Linnaeus) (Anura: Bufonidae) in Australia Author Ni, Xue-Feng Key Laboratory of Molecular Cell Biology, Ministry of Education of the People’s Republic of China; Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province; College of Life Sciences, Hebei Normal University, Shijiazhuang, Hebei Province, P. R. China; Author Barton, Diane P. School of Tropical Biology, James Cook University, Townsville, Queensland, Australia; & School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt University, Estella, New South Wales, Australia Author Chen, Hui-Xia Key Laboratory of Molecular Cell Biology, Ministry of Education of the People’s Republic of China; Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province; College of Life Sciences, Hebei Normal University, Shijiazhuang, Hebei Province, P. R. China; Author Li, Liang Key Laboratory of Molecular Cell Biology, Ministry of Education of the People’s Republic of China; Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province; College of Life Sciences, Hebei Normal University, Shijiazhuang, Hebei Province, P. R. China; text Folia Parasitologica 2022 028 2022-12-02 69 1 7 http://dx.doi.org/10.14411/fp.2022.028 journal article 57497 10.14411/fp.2022.028 1521fd7a-616e-4e6b-a8e9-1a9b1709b9b1 1803-6465 8143684 Key to the species of Maxvachonia Maxvachonia brygooi was treated as incertae sedis and is not included in the key; 1a Spicules longer than gubernaculum ……………….... 2 1b Spicules shorter than gubernaculum …....................... 3 2a Two pairs of precloacal papillae .................... M. ewersi 2b Five pairs of precloacal papillae .................... M. ingens 3a Tail tip of female rounded ........................ M. dimorpha 3b Tail tip of female conical (tail normally with finger-like tip) .............................................................................. 4 4a Two or three pairs of precloacal papillae; eggs with long filaments ............................................. M. flindersi 4b Five to six pairs of precloacal papillae; eggs without filaments ..................................................................... 5 5a Precloacal longitudinal grooves present in male; tail tip of female without nodular protuberances ... M. adamsoni 5b Precloacal longitudinal grooves absent in male; tail tip of female with numerous nodular protuberances ........... ................................................................... M. chabaudi