rc-o319 rc-o319 rc-o319 is a bat-derived strain of severe acute respiratory syndrome–related coronavirus collected in little japanese horseshoe bats (rhinolophus cornutus) from sites in iwate, japan. its has 81% similarity to sars-cov-2 and is the earliest strain branch of the sars-cov-2 related coronavirus. rc-o319 virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: nidovirales family: coronaviridae genus: betacoronavirus subgenus: sarbecovirus species: severe acute respiratory syndrome–related coronavirus strain: rc-o319 a phylogenetic tree based on whole-genome sequences of sars-cov-2 and related coronaviruses is: sars‑cov‑2 related coronavirus (bat) rc-o319, 81% to sars-cov-2, rhinolophus cornutus, iwate, japan bat sl-zxc21, 88% to sars-cov-2, rhinolophus pusillus, zhoushan, zhejiang bat sl-zc45, 88% to sars-cov-2, rhinolophus pusillus, zhoushan, zhejiang pangolin sarsr-cov-gx, 85.3% to sars-cov-2, manis javanica, smuggled from southeast asia pangolin sarsr-cov-gd, 90.1% to sars-cov-2, manis javanica, smuggled from southeast asia bat rshstt182, 92.6% to sars-cov-2, rhinolophus shameli, steung treng, cambodia bat rshstt200, 92.6% to sars-cov-2, rhinolophus shameli, steung treng, cambodia (bat) raccs203, 91.5% to sars-cov-2, rhinolophus acuminatus, chachoengsao, thailand (bat) rmyn02, 93.3% to sars-cov-2, rhinolophus malayanus, mengla, yunnan (bat) rpyn06, 94.4% to sars-cov-2, rhinolophus pusillus, xishuangbanna, yunnan (bat) ratg13, 96.1% to sars-cov-2, rhinolophus affinis, mojiang, yunnan (bat) banal-52, 96.8% to sars-cov-2, rhinolophus malayanus, vientiane, laos sars-cov-2 sars-cov-1, 79% to sars-cov-2