Mt Heimen (Triassic of Svalbard and Jan Mayen)

Where: Svalbard and Jan Mayen (78.6° N, 15.4° E: paleocoordinates 41.8° N, 8.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Sticky Keep Member (Kongressfjellet Formation), Smithian (251.3 - 247.2 Ma)

• From the "Fischniveau" (fish horizon) of the "Posidonomya Beds" (Wiman 1914; Nilsson 1942)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, black shale

Size class: macrofossils

Collected in 1939

• PIU: Palaeontological Institute of the University of Uppsala

Primary reference: T. Nilsson. 1943. On the morphology of the lower jaw of Stegocephalia with special reference to Eotriassic stegocephalians from Spitzbergen. I. Descriptive Part. Kungl. Svenska Vetenskapsakademiens Handlingar 20(9):1-46 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 144048: authorized by Richard Butler, entered by Richard Butler on 29.04.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Amphibia
 Temnospondyli - Trematosauridae
Aphaneramma rostratum Woodward 1904 tetrapod
Lower jaw (unnumbered specimen)
 Temnospondyli - Mastodonsauridae
"cf. Sassenisaurus spitzbergensis" = Cyclotosaurus spitzbergensis
"cf. Sassenisaurus spitzbergensis" = Cyclotosaurus spitzbergensis Wiman 1914 tetrapod
Partial lower jaw (unnumbered specimen)