Genus: Spitrasaurus KNUTSEN, DRUCKENMILLER & HURUM, 2012B
Etymology: After Spitsbergen Travel, locally known and abbreviated Spitra, and Greek, sauros, "lizard."

Species: wensaai KNUTSEN, DRUCKENMILLER & HURUM, 2012B
Etymology: In honor of Tommy Wensas, PMO volunteer, who has been involved in the discovery and collection of marine reptiles in Svalbard for many years.

Holotype: PMO 219.718

Locality: The north slope of Janusfjellet, Spitsbergen, Svalbard, Norway.

Horizon: 2.5 meters above the Dorsoplanites Bed, Slottsmaya Member, Agardhfjellet Formation.

Biostratigraphy: Dorsoplanites ilovaiskyi to Dorsoplanites maximus ammonite zone.

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

Material: An articulated postcranial juvenile skeleton including an articulated axial column from the atlas-axis to the 12 dorsal vertebra, cervical and dorsal ribs, numerus gastralia, complete pectoral girdle and much of the forelimbs and right hind limb.

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Species: larseni KNUTSEN, DRUCKENMILLER & HURUM, 2012B
Etymology: In honor of Stig Larsen, PMO volunteer, who has been involved in the discovery and collection of marine reptiles in Svalbard for many years.

Holotype: SVb 1450

Locality: The north slope of Janusfjellet, Spitsbergen, Svalbard, Norway.

Horizon: 9 meters Below the Dorsoplanites Bed, Slottsmaya Member, Agardhfjellet Formation.

Biostratigraphy: Dorsoplanites ilovaiskyi to Dorsoplanites maximus ammonite zone.

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

Material: Disarticulated juvenile plesiosaur skeleton consisting of the basioccipital, right quadrate and incomplete right squamosal, an incomplete jaw and several incomplete associated teeth, an articulated cervical series that is complete from the atlas-axis to the 31st cervical vertebra, and an articulated partial left forelimb.