Nematodes from terrestrial and freshwater habitats in the Arctic Holovachov, Oleksandr Biodiversity Data Journal 2014 2 1165 1165 8G8YB 2908747 Thorne & Malek, 1968 Thorne & Malek 1968 Chromadorea Tylenchidae Filenchus CoL Animalia Filenchus cylindricus Rhabditida 0 1165 Nematoda species cylindricus  Notes Lena River estuary, Russia ( Gagarin 2001b).