Another virus in this group has been isolated from birds. Fur seal feces-associated circular DNA virus was isolated from the faeces of a fur seal ("Arctocephalus forsteri") in New Zealand. The genome has 2 main open reading frames and is 2925 nucleotides in length. Another virus—porcine stool associated virus 4—has been isolated. It appears to be related to the fur seal virus. Two viruses have been described from the nesting material yellow crowned parakeet ("Cyanoramphus auriceps")—Cyanoramphus nest-associated circular X virus (2308 nt) and Cyanoramphus nest-associated circular K virus (2087 nt) Both viruses have two bidirectional open reading frames. Within these are the rolling-circle replication motifs I, II, III and the helicase motifs Walker A and Walker B. There is also a conserved nonanucleotide motif required for rolling-circle replication. CynNCKV has some similarity to the picobiliphyte nano-like virus (Picobiliphyte M5584-5) and CynNCXV has some similarity to the rodent stool associated virus (RodSCV M-45). A virus with a circular genome—sea turtle tornovirus 1—has been isolated from a sea turtle with fibropapillomatosis. It is sufficiently unrelated to any other known virus that it may belong to a new family. The closest relations seem to be the "Gyrovirinae". The proposed genus name for this virus is Tornovirus. Another faecal virus—feline stool-associated circular DNA virus—has been described. Among these are the parvovirus-like viruses. These have linear single-stranded DNA genomes but unlike the parvoviruses the genome is bipartate. This group includes Hepatopancreatic parvo-like virus and Lymphoidal parvo-like virus. A new family Bidensoviridae has been proposed for this group but this proposal has not been ratified by the ICTV to date. Their closest relations appear to be the "Brevidensoviruses" (family Parvoviridae). A virus—Acheta domesticus volvovirus—has been isolated from the house cricket ("Acheta domesticus"). The genome is circular, has four open reading frames and is 2,517 nucleotides in length. It appears to be unrelated to previously described species.