| Group III (dsRNA)|
| Seadornavirus, Oryzavirus, Cypovirus, Coltivirus|
Cardoreovirus is a genus of viruses, in the family Reoviridae, in the subfamily Sedoreovirinae. Crabs serve as natural hosts. There is currently only one species in this genus: the type species Eriocheir sinensis reovirus. Diseases associated with this genus include: trembling disease.
Viruses in Cardoreovirus are non-enveloped, with icosahedral geometries, and T=13, T=2 symmetry. The diameter is around 55 nm. Genomes are linear and segmented.
Viral replication is cytoplasmic. Entry into the host cell is achieved by attachment to host receptors, which mediates endocytosis. Replication follows the double-stranded RNA virus replication model. Double-stranded RNA virus transcription is the method of transcription. The virus exits the host cell by monopartite non-tubule guided viral movement. Crabs serve as the natural host. Transmission routes are passive diffusion.