Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] ?"viruses" Order Caudovirales Family Ackermannviridae 1 Erwinia virus Ea2809 2.1 Serratia virus MAM1 2.2.1.1.1 Serratia virus IME250 2.2.1.1.2 Klebsiella virus 0507KN21 2.2.1.2 Subfamily Aglimvirinae 2.2.2 Subfamily Cvivirinae