Wikipedia
Ophioviridae
Ophioviridae is a family of viruses characterized by an elongated and highly filamentous and flexible nucleocapsid with helical symmetry.
The protein capsid is non- enveloped and has a constant diameter of 1500–2500 nm and a width of 3 nm, or 9 nm. The capsids form kinked circles, which can collapse to form linear duplex structures, much like a spring.
The entire genome is 1100–1200 nucleotides long.