Phylogenetic tree generated by the maximum-likelihood method, using the GTR + I+Γ model of evolution, based on the alignment of L-segment sequences of BOGV strains 2073 (JX990964), 2074 (JX990965) and 2177 (KC537795). The phylogenetic positions of BOGV are shown in relationship to representative soricine shrew-borne hantaviruses, including Cao Bang virus (CBNV CBN-3, EF543525), Ash River virus (ARRV MSB73418, EF619961), Jemez Springs virus (JMSV MSB144475, FJ593501) and Qiandao Lake virus (QDLV YN05-284, GU566021). Representative strains of Seewis virus (SWSV) from Poland and other widely separated geographic regions are indicated by their country of origin and GenBank numbers. Also shown are crocidurine shrew-borne hantaviruses, including Thottapalayam virus (TPMV VRC66412, EU001330), Imjin virus (MJNV 05–11, EF641806), Tanganya virus (TGNV Tan826, EF050454), Azagny virus (AZGV KBM15, JF276228) and Jeju virus (JJUV 10–11, HQ834697); and mole-borne hantaviruses, including Asama virus (ASAV N10, EU929078), Nova virus (NVAV MSB95703, FJ593498) and Oxbow virus (OXBV Ng1453, FJ593497). Rodent-borne hantaviruses include Hantaan virus (HTNV 76–118, NC_005222), Soochong virus (SOOV SOO-1, DQ056292), Dobrava virus (DOBV Greece, NC_005235), Seoul virus (SEOV 80–39, NC_005238), Tula virus (TULV M5302v, NC_005226), Puumala virus (PUUV Sotkamo, NC_005225), Prospect Hill virus (PHV PH-1, EF646763), Sin Nombre virus (SNV NMH10, NC_005217) and Andes virus (ANDV Chile9717869, AF291704). The numbers at each node are bootstrap values, expressed as percentages, based on 1,000 iterations, and the scale bar indicates nucleotide substitutions per site.