Business Insider: The most likely intermediary species for the new coronavirus are bats, pigs, civets, or pangolins (not snakes, as some researchers initially suggested). That's because these animals also have the same ACE2 receptors.

https://www.businessinsider.com/china-wuhan-coronavirus-compared-to-sars-2020-1#sars-jumped-from-bats-to-weasel-like-mammals-called-masked-palm-civets-then-to-humans-the-spillover-happened-in-wet-markets-in-guangdong-china-9