Alphanecrovirus [SEP] parent taxon
Alphanecrovirus
Alphanecrovirus is a genus of viruses, in the family Tombusviridae. Plants serve as natural hosts. There are currently three species in this genus, including the type species Tobacco necrosis virus A.
Taxonomy.
Group: ssRNA(+)
Structure.
Viruses in Alphanecrovirus are non-enveloped, with icosahedral and spherical geometries, and T=3 symmetry. The diameter is around 28 nm. Genomes are linear, around 4kb in length.
Life cycle.
Viral replication is cytoplasmic. Entry into the host cell
Taxon in disguise
In bacteriology, a taxon in disguise is a species, genus or higher unit of biological classification whose evolutionary history reveals has evolved from another unit of similar or lower rank, making the parent unit paraphyletic. This happens when rapid evolution makes a new species appear radically different from the ancestral group, so that it is not (initially) recognised as belonging to the parent phylogenetic group, leaving the latter an evolutionary grade.
While the term is from bacteriology, parallel examples are found throughout the tree of