Arnidovirineae is a suborder of viruses in the order Nidovirales.

There are 4 families and 16 genera in the Arnidovirineae suborder.

[1] For species that fall under the Arnidovirineae suborder, large mammals serve as natural hosts, with sizes varying from mice to boars and horses.

However, for 3 genera snakes and turtles serve as natural hosts.

These genome differences are the primary identifying factor of the suborder.