Maximum clade credibility genealogy based on partial (175-nt) sequences of the Crimean-Congo hemorrhagic fever virus small RNA segment of viruses from Spain and reference sequences. Numbers along branches indicate posterior probability values for the groups (values <0.70 are not shown). Triangles indicate newly sequenced strains from Spain reported in this study, which are identified by geographic origin, sampling site, and sampling year. Other sequences are indicated by GenBank accession number, strain, geographic origin, and sampling year. Sequences from this study indicated with an asterisk are included in European Molecular Biology Laboratory/GenBank databases. Genotypes are indicated in roman numerals and named according to Carroll et al. (30). Equivalent clade nomenclature is listed according to Chamberlain et al. (31) and indicated at right. Scale bar indicates nucleotide substitutions per site.