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 57. Amblyomma humerale Koch, 1844a . Neotropical: 1) Bolivia , 2) Brazil , 3) Colombia , 4) Ecuador , 5) French Guiana, 6) Guyana , 7) Peru , 8) Suriname , 9) Trinidad and Tobago , 10) Venezuela ( Keirans 1985 b , Guerrero 1996, Robbins et al. 2003 , Mastropaolo et al. 2014 , Acevedo-Gutiérrez et al. 2020 , Binetruy et al. 2020 , Guglielmone et al. 2021 ). Amblyomma crassum , Amblyomma humerale and Amblyomma sabanerae are morphologically similar taxa, and their separation is sometimes difficult ( Guglielmone et al. 2021 ). See also Amblyomma crassum . The Paraguayan record of Amblyomma humerale in Berlese (1888) represents, in fact, Amblyomma dissimile , as discussed in Tonelli Rondelli (1939) . Neumann (1899) described Amblyomma gypsatum , a synonym of Amblyomma humerale , from specimens allegedly collected in Uruguay but cited a locality that is not found there ( Guglielmone et al. 2021 ). Evans (1947) recorded Amblyomma humerale (as Amblyomma humerli , a lapsus ) from Panama , but Fairchild et al. (1966) treated this record as erroneous. Vargas (1955) listed Amblyomma humerale from Mexico , but its presence in that country was not confirmed by Guzmán-Cornejo et al. (2011) . Consequently, Paraguay , Uruguay , Panama and Mexico are excluded from the geographic distribution of Amblyomma humerale .