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 Genus Hyalomma The genus Hyalomma is particularly difficult to evaluate in historical terms because the definitions of several species are confusing, as are the unusual number of subspecies that have been proposed. However, Apanaskevich and co-workers greatly clarified the taxonomic status of Hyalomma in a series of papers published from 2000 to 2010. The geographic distribution of Hyalomma species is largely based on these papers, together with several studies cited by these authors, and new data published after 2010. Most, but not all, of the papers cited here that were published before the studies of Apanaskevich and colleagues are recognized as containing authoritative information.