What is "gammacoronavirus"

Gammacoronaviruses are one of the four genera, alpha, beta, gamma, and delta in the subfamily Coronavirinae of the family Coronaviridae. They are enveloped, positive-sense, single-stranded RNA viruses of zoonotic origin. Coronaviruses infect both animals and humans. While the alpha and beta genera are derived from the bat gene pool, the gamma and delta genera are derived from the avian and pig gene pools.