Subfamily: Firstpapillomavirinae

Genus: Thetapapillomavirus

Distinguishing features

Members of the only species in this genus are associated with cutaneous lesions in birds and does not contain an E6 ORF, but contains an E9 protein of unknown function. No E8^E2 or E1^E4 proteins have been identified. 

Virion

See discussion under family description. 

Genome organization and replication

See discussion under family description. 

Biology

See discussion under family description. 

Species demarcation criteria

Putative novel papillomavirus genome with complete genome sequence data available and that is <70% related to papillomaviruses within the genus.