The nomenclatural status of Heteraxinoides Yamaguti, 1943, Heteraxinoides Yamaguti, 1963, Allopseudaxine Yamaguti, 1943, Axine tripathii Price, 1962, and Axine tripathii Yamaguti, 1963, with the proposal of Neoheteraxinoides nom. nov. (Monogenoidea: Microcotylinea).

An analysis of the nomenclature of Heteraxinoides Yamaguti, 1943, Heteraxinoides Yamaguti, 1963, Allopseudaxine Yamaguti, 1943, Axine tripathii Price, 1962, and Axine tripathii Yamaguti, 1963 was conducted, which resulted in the proposal of the following: 1) the subgenus Heteraxinoides Yamaguti, 1943 is a nomen nudum; 2) Heteraxinoides Price, 1962 and Heteraxinoides inada (Ishii & Sawada, 1938) Price, 1962 represent the correct authorships for the respective taxa; 3) Heteraxinoides Yamaguti, 1963 and Heteraxinoides Yamaguti sensu Price are junior homonyms of Heteraxinoides Price, 1962; 4) Heteraxinoides Price, 1962 is a junior subjective synonym of Axine Abildgaard, 1794; 5) Heteraxinidae Price, 1962 is a junior objective synonym of Heteraxinidae Unnithan, 1957; 6) Allopseudaxine Yamaguti, 1943 is valid and available sensu the International Code of Zoological Nomenclature; and 7) the homonyms Axine tripathii Price, 1962 and Axine tripathii Yamaguti, 1963 are objective junior synonyms of Axine hemirhamphae Tripathi, 1959. Neoheteraxinoides nom. nov. is proposed to replace the junior homonym Heteraxinoides Yamaguti, 1963, and the following new combinations are advanced: Neoheteraxinoides argiropsi (Mamaev, 1977) comb. n., N. atlanticus (Gayevskaya & Kovaljova, 1979) comb. n., N. caprodontis (Yamaguti, 1968) comb. n., N. chinensis (Yamaguti, 1937) comb. n., N. hargisi (Price, 1962) comb. n., N. novaezealandiae (Dillon & Hargis, 1965) comb. n., N. oligoplitis (Meserve, 1938) comb. n., N. pseudosciaenai (Gupta & Khullar, 1968) comb. n., N. regis (Dillon & Hargis, 1965) comb. n., N. scorpis (Sanders, 1944) comb. n., N. triangularis (Goto, 1894) comb. n. (type species), N. xanthophilis (Hargis, 1956) comb. n., N. xanthophiloides (Price, 1962) comb. n., and N. zhukovi (Caballero & Bravo Hollis, 1963) comb. n.