Authors: Coronaviridae

Patrick C.Y. Woo*
Coronaviridae Study Group Chair
PhD Program in Translational Medicine and Department of Life Sciences
National Chung Hsing University
Taichung 402
Taiwan
E-mail: [email protected]

Subfamily: Pitovirinae

Genus: Alphapironavirus

Distinguishing features

As only one genus is currently recognized, the genus description corresponds to the subfamily description. The only known host is a fish.

Subgenus demarcation criteria

Details correspond to the family descriptions.

Species demarcation criteria

Details correspond to the family descriptions.

Family: Coronaviridae

Subfamily: Pitovirinae

Distinguishing features

The subfamily Pitovirinae was established for the virus Pacific salmon nidovirus based on its low overall genome sequence identity with other coronaviruses despite conservation of the canonical replicase domains found in other members of the family Coronaviridae (Figure 1 Pitovirinae).

Subfamily: Orthocoronavirinae

Genus: Gammacoronavirus

Subfamily: Orthocoronavirinae

Genus: Deltacoronavirus

Subfamily: Orthocoronavirinae

Genus: Betacoronavirus

Subfamily: Orthocoronavirinae

Genus: Alphacoronavirus

Family: Coronaviridae

Subfamily: Orthocoronavirinae

Subfamily: Letovirinae

Genus: Alphaletovirus

Distinguishing features

As only one genus is currently recognized, the genus description corresponds to the subfamily description.

Subgenus demarcation criteria

Details correspond to the family descriptions.

Species demarcation criteria

Details correspond to the family descriptions.

Family: Coronaviridae

Subfamily: Letovirinae

Distinguishing features

The subfamily Letovirinae was established for Microhyla letovirus 1 (Figure 1 Letovirinae) based on DEmARC analysis of the nidovirus-wide conserved 3CLpro, NiRAN, RdRP, ZBH and HEL1 domains.