Nidovirales
Nidovirales sunt ordo virorum biologicorum cum ARN materia genetica (virus ARN) et, in taxonomia 2018b internationali, una ex tribus ordinibus regni riboviriorum.

Currente in taxinomia (2018b) nidoviralium attribuuntur subordines septem:
 Subordo Abnidovirineae
 Subordo Arnidovirineae
 Subordo Cornidovirineae (cum 2019-nCoV)
 Subordo Mesnidovirineae
 Subordo Monidovirineae
 Subordo Ronidovirineae
 Subordo Tornidovirineae

Notae 

 Pneumonia

Riboviria
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