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 62. Rhipicephalus pseudolongus Santos Dias, 1953 . Afrotropical: 1) Cameroon , 2) Gabon (Santos Dias 1953 a, Pourrut et al. 2011 ). Rhipicephalus pseudolongus is another controversial species, treated as provisionally valid in Walker et al. (2000) , Guglielmone et al. (2009 , 2014) and Guglielmone & Nava (2014) , whose morphological separation from Rhipicephalus cliffordi , Rhipicephalus compositus , Rhipicephalus longus and Rhipicephalus senegalensis is extremely difficult. However, Walker et al. (2000) regarded Rhipicephalus cliffordi as a synonym of Rhipicephalus pseudolongus , and these authors included within the geographic distribution of Rhipicephalus pseudolongus the localities where Rhipicephalus cliffordi had been found, although they considered the presence of Rhipicephalus pseudolongus (= Rhipicephalus cliffordi ) in Angola and Togo to be confirmed. Elbl & Anastos (1966c) treated Rhipicephalus pseudolongus as a synonym of Rhipicephalus compositus , while Rhipicephalus pseudolongus of Santos Dias (1953a, named Rhipicephalus capensis pseudolongus ) was regarded by Camicas et al. (1988) as a synonym of Rhipicephalus longus , and Rhipicephalus pseudolongus in Clifford & Anastos (1962) was regarded as a synonym of Rhipicephalus cliffordi . Clearly, this situation only increases the likelihood of confusion between the species of Rhipicephalus named here. Therefore, we have restricted the distribution of Rhipicephalus pseudolongus to its country of origin, Cameroon , and, provisionally, Gabon because Pourrut et al. (2011) clearly separated records of Rhipicephalus cliffordi from records of Rhipicephalus pseudolongus in that country.