Geographic distribution of the hard ticks (Acari: Ixodida: Ixodidae) of the world by countries and territories Author Guglielmone, Alberto A. 0000-0001-5430-2889 guglielmone.alberto@inta.gob.ar Author Nava, Santiago 0000-0001-7791-4239 nava.santiago@inta.gob.ar Author Robbins, Richard G. 0000-0003-2443-5271 robbinsrg@si.edu text Zootaxa 2023 2023-03-07 5251 1 1 274 http://dx.doi.org/10.11646/zootaxa.5251.1.1 journal article 235222 10.11646/zootaxa.5251.1.1 43227427-a867-4744-9e4c-2b2302524890 1175-5326 7704190 3326BF76-A2FB-4244-BA4C-D0AF81F55637 101. Amblyomma pseudoconcolor Arag ã o, 1908c. Neotropical: 1) Argentina , 2) Bolivia , 3) Brazil , 4) French Guiana , 5) Paraguay , 6) Suriname , 7) Uruguay ( Floch & Fauran 1958 , Arzua et al. 2005 , Guglielmone & Nava 2006 , Nava et al. 2007 , Mastropaolo et al. 2014 , Martins et al. 2020 , Guglielmone et al. 2021 ). Difficulties can be encountered when attempting to morphologically separate Amblyomma pseudoconcolor from Amblyomma auricularium , a problem that remains unresolved because there is no type material for Amblyomma auricularium that would enable a comparison of these species. A degree of uncertainty therefore attends published diagnoses of Amblyomma pseudoconcolor ( Guglielmone et al. 2020 , 2021). See also Amblyomma auricularium . Floch & Fauran (1958) collected adults of Amblyomma pseudoconcolor in French Guiana , but its presence there was not confirmed by Binetruy et al. (2019) , and French Guiana is provisionally included within the geographic distribution of this tick, both in Guglielmone et al. (2021) and here. Romero-Castañón et al. (2008) allegedly found Amblyomma pseudoconcolor in southern Mexico , a record regarded as a diagnostic error by Guglielmone et al. (2021) . Consequently, Mexico is excluded from the range of this tick.