Is this bilogical sentence gramatically correct?

[Unregistered]

Please tell me, is this bilogical sentence gramatically correct?

Studies of zoogeographical distribution of nematodes of families Longidoridae (order Dorylaimida) and Trichodoridae (order Triplonchida) as vectors of nepo- and tobra-virus groups on the territory of Russia

[BobK]

'in Russia'; you could say 'the families' (but it's OK without, especially if this is a title - which I suspect, as it's not a sentence).

b