Genus: Cryopterygius DRUCKENMILLER, HURUM, KNUTSEN, & NAKREM, 2012
Etymology: Greek, cryo, "cold or frozen" and Greek, pterygius, "fin"; in reference to its distinctive paddle morhpology and its occurrence in high latitudes and excavation out of permafrost.

Species: kristiansenae DRUCKENMILLER, HURUM, KNUTSEN, & NAKREM, 2012
Etymology: In honour of Lena Kristiansen, long-time participant in the Spitsbergen Jurassic Research Group field work on Spitsbergen.

Holotype; PMO 214.578.

Locality: North side of Janusfjellet, approximately 13 km northeast of Longyearbyen, Arctic Archipelago of Svalbard, Norway.

Horizon: 6.2 meters below the Dorsoplanites Bed, Slottsmøya Member, Agardhfjellet Formation.

Biostratigraphy: Dorsoplanites ilovaiskyi to Dorsoplanites maximus ammonite zone.

Age: Middle Volgian (Tithonian Stage), Upper Malm Epoch, Upper Late Jurassic.

Material: Complete skull, the entire presacral and preflexural vertebral column, numerous ribs and gastralia, most of the right and left pectoral girdle and limb, and the left pelvic girdle and hind limb.


Species: kielanae TYBOROWSKI, 2016
Etymology: In honor of Zofia Kielan-Jaworowska (1925-2015), worldrenowed Polish researher of Mesozoic Mammals.

Holotype: GMUL 2579-81

Locality: Owadow-Brzezinki Quarrry, of Nordkalk GmbH, Shawno, Vinicity of Tomaszow Mazowiecki,5122'34"N, 2008'07"86"E,  Central Poland.

Horizon: Shawno Limestone Member, Lower part of the Keynia Formation.


Age: Uppermost Lower Tithonian Stage = Middle Volgian, Malm Epoch, Late Jurassic.

Material: A fragment of the lower jaw, isoalted teeth, fragmetns of pterygoid and quadrate, parts of the cervical, dorsal, and caudal vertebral column, most of the left pectoral girdle, right clavicle, right forefin, and lower femur.