Obsolete virus taxa

Echovirus is a polyphyletic group of viruses associated with enteric disease in humans. The name is derived from "enteric cytopathic human orphan virus". These viruses were originally not associated with disease, but many have since been identified as disease-causing agents. The term "echovirus" was used in the scientific names of numerous species, but all echoviruses are now recognized as strains of various species, most of which are in the family Picornaviridae.

Luteoviridae was a family of viruses. The family was abolished in 2020 based on evidence that its three genera and seven species unassigned to a genus belonged to two other, existing families.

Flexiviridae was a family of viruses named after being filamentous and highly flexible. Members of the family infect plants. In 2009, the family was dissolved and replaced with four families, each of which still contain the name flexiviridae:

REDIRECT Orthoparamyxovirinae

REDIRECT Pneumoviridae

Tetraviridae is a family of viruses named due to its members having T=4 symmetry and infecting butterflies and moths. The family was dissolved in 2011 due to genetic differences and replaced with three families, each of which still contain the name tetraviridae: