The northeastern slope of Janusfjellet (Djupedalia engeri type) (Jurassic of Norway)

Where: Spitsbergen, Norway (78.3° N, 15.9° E: paleocoordinates 69.5° N, 15.6° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dorsoplanites ilovaiskyi–Dorsoplanites maximus ammonoid zone, Slottsmøya Member (Agardhfjellet Formation), Tithonian (152.1 - 145.0 Ma)

• 20 metres below the Dorsoplanites Bed, Slottsmøya Member, Agardhfjellet Formation, Janusfjellet. Dorsoplanites ilovaiskyi to Dorsoplanites maximus ammonite zones, Middle Volgian (Tithonian; Nagy & Basov, 1998; Collignon & Hammer, 2012; Gradstein et al. in press).

•7 metres above the yellow silt layer (Hurum et al. 2012, table 1).

Environment/lithology: deep-water; concretionary, sideritic, black, gray, silty mudstone

• The Slottsmøya Member, which averages 55 to 60 metres in thickness in the study area, consists of dark-grey to black silty mudstone, often weathering to paper shale, and discontinuous silty beds with local occurrences of red to yellowish sideritic concretions as well as siderite and dolomite interbeds (Dypvik et al., 1991a; Hammer et al., 2011; Collignon & Hammer, 2012).

Size class: macrofossils

Collected by PMO expedition in 2009

Collection methods: surface (in situ),

• PMO, Natural History Museum, University of Oslo collection

Primary reference: E. M. Knutsen, P. S. Druckenmiller, and J. H. Hurum. 2012. A new plesiosauroid (Reptilia: Sauropterygia) from the Agardhfjellet Formation (Middle Volgian) of central Spitsbergen, Norway. Norwegian Journal of Geology 92:213-234 [R. Benson/R. Benson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 134763: authorized by Roger Benson, entered by Roger Benson on 16.10.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Sauropterygia - Cryptoclididae
Djupedalia engeri n. gen. n. sp.
Djupedalia engeri n. gen. n. sp. Knutsen et al. 2012 plesiosaur
Holotype: PMO 216.839: semiarticulated skeleton of a juvenile plesiosaur including a partial lower jaw and incomplete left quadrate and squamosal; a partial cervical and dorsal vertebral series; several articulated cervical ribs; disarticulated cervical and dorsal neural arches; disarticulated dorsal ribs and gastralia; an incomplete pectoral girdle and two partial forelimbs; both pubes and one incomplete hindlimb.