Halobiotus arcturulius n. sp. (Crisp & Kristensen 1983)
Terra typica: Greenland Sea (Greenland, Arctic)
Greenland Sea:
• 72 ° 12 'N, 23 ° 56 'W [72 ° 15 ′N, 23 ° 56 ′W]; 0 m bsl: [FAO 27] Type Locality: Central East Greenland, Sermersooq Municipality, King Oscar Fjord, close to Mestersvig, sandy arctic beach, 5 m from a fresh-water stream, shallow water, sediment. Crisp & Kristensen (1983)
Record numbers (Sea/Ocean classification): Greenland Sea: 1; total: 1.
Record numbers (FAO classification): FAO 27: 1; total: 1.
Remarks: Halobiotus species are true secondarily marine species, although a few other eutardigrades are known from river estuaries where the salinity is very low, e.g. Isohypsibius granditintinus Chang & Rho, 1997 c (Chang & Rho 1997 c). Known only from the type locality, H. arcturulius is very similar to H. stenostomus and some records of this latter species may in fact belong to H. arcturulius (for more detail see remarks for H. stenostomus).