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 214. Ixodes siamensis Kitaoka & Suzuki, 1983 . Oriental: 1) Thailand ( Kitaoka & Suzuki 1983 ). Ixodes siamensis is not listed as a valid name in Keirans (1992) , while Camicas et al. (1998) and Kolonin (2009) regarded Ixodes siamensis as a synonym of Ixodes ovatus , without providing evidence for this claim. On the other hand, Horak et al. (2002) listed this tick as valid, while Guglielmone et al. (2009 , 2010 a, 2014 , 2020) and Guglielmone & Nava (2014) regard Ixodes siamensis as provisionally valid.