Following Surlyk et al.[1], the Wordie Creek Group is subdivided into two formations, the Kap Stosch Formation and the overlying Godthåb Golf Formation. The Kap Stosch Formation was deposited in relatively deep, partly isolated turbiditic basin, and the Godthåb Golf Formation under relatively shallow marine conditions.
In 1935, Eigil Nielsen[8] recognized five fossil-bearing horizons ("fish zones 1–5")[9][10] corresponding to three ammonoid zones (in ascending order):
Otoceras zone ("fish zones 1 and 2")
Vishnuites zone ("fish zones 3 and 4")
Proptychites zone ("fish zone 5")
The first two ammonoid zones are Griesbachian in age and the last one is Dienerian in age (Induan). The Kap Stosch Formation corresponds to these three zones. A sixth fossiliferous layer, the "Stegocephalian horizon", is present above, which belongs to the Godthåb Golf Formation (Dienerian). The Hypophiceras triviale ammonoid zone below Nielsen's "fish zones" is dated late Changhsingian.[1]
The Kap Stosch Formation is subdivided into the following eight members (in ascending order):[1]
Nebalopok Member (upper Changhsingian–lower Griesbachian)
Immaqa Member (lower Griesbachian)
Fiskeplateau Member (lower Griesbachian)
Knolden Member (lower Griesbachian)
Pyramiden Member (lower–upper Griesbachian)
Naasut Member (upper Griesbachian)
Falkeryg Member (lower Dienerian)
Vestplateau Member (lower Dienerian)
The Godthåb Golf Formation is not subdivided into members.[1]
A whiteiid coelacanth[15] that was originally described as Whiteia sp. and "undetermined coelacanth".[4] The genus Whiteia had a cosmopolitan distribution during the Triassic
Kap Stosch Formation, Pyramiden Member ("Fish zone 2")[9]
A rhadinichthyid or turseoid, It was originally described as Glaucolepis arctica,[3] but later referred to the genus Pteronisculus because the genus name Glaucolepis is preoccupied
P. aldingeri
Kap Stosch Formation, Pyramiden Member ("Fish zones 2 and 4")[9]
A rhadinichthyid or turseoid, It was originally described as Glaucolepis aldingeri,[9] but later referred to the genus Pteronisculus because the genus name Glaucolepis is preoccupied
P. gunnari
Kap Stosch Formation, Pyramiden Member ("Fish zones 2?–3")[9]
A rhadinichthyid or turseoid, It was originally described as Glaucolepis gunnari,[9] but later referred to the genus Pteronisculus because the genus name Glaucolepis is preoccupied
P. magnus
Kap Stosch Formation, Falkeryg Member ("Fish zone 5")[9]
A rhadinichthyid or turseoid, It was originally described as Glaucolepis magna,[9] but later referred to the genus Pteronisculus because the genus name Glaucolepis is preoccupied
P. stensioei
Kap Stosch Formation, Falkeryg Member ("Fish zone 5")[9]
A rhadinichthyid or turseoid, It was originally described as Glaucolepis stensioei,[9] but later referred to the genus Pteronisculus because the genus name Glaucolepis is preoccupied
Pteronisculus sp.
Kap Stosch Formation, Pyramiden Member ("Fish zones 2–4"), Godthåb Golf Formation ("Stegocephalian horizon")[9]
A rhadinichthyid or turseoid, It was originally referred to the genus Glaucolepis,[9] a homonym of Pteronisculus
Kap Stosch Formation, Pyramiden Member ("Fish zones 2–4"), Falkeryg Member ("Fish zone 5")[8]
A perleidiform neopterygian. It was originally described as Perleidus stoschiensis,[3]. Early Triassic species of Perleidus were subsequently referred to the genus Teffichthys[21]
^ abcdefghNielsen, Eigil (1936). "Some few preliminary remarks on Triassic fishes from East Greenland". Meddelelser om Grønland. 112 (3): 1–55.
^ abcdefSäve-Söderbergh, Gunnar (1935). "On the dermal bones of the head in labyrinthodont stegocephalians and primitive Reptilia with special reference to Eotriassic stegocephalians from East Greenland". Meddelelser om Grønland. 98 (3): 1–211..
^ abNielsen, Eigil (1954). "Tupilakosaurus heilmani n. g. et n. sp. an interesting batrachomorph from the Triassic of East Greenland". Meddelelser om Grønland. 722 (8): 1–33.
^ abcdefghijklmnopqrNielsen, Eigil (1935). "The Permian and Eotriassic vertebrate-bearing beds at Godthaab Gulf (East Greenland)". Meddelelser om Grønland. 98 (1): 1–111.
^ abcdefghijklmnNielsen, Eigil (1942). "Studies on Triassic fishes from East Greenland 1. Glaucolepis and Boreosomus". Palaeozoologica Groenlandica. 1: 1–403.
^ abcdefghijNielsen, Eigil (1949). "Studies on Triassic fishes from East Greenland 2. Australosomus and Birgeria". Palaeozoologica Groenlandica. 3: 1–309.
^Nielsen, Eigil (1967). "New observations on the skull-roof of the holotype of Tupilakosaurus heilmani Nielsen". Journal of the Linnean Society (Zoology). 47 (311): 225–229. doi:10.1111/j.1096-3642.1967.tb01405.x.
^ abForey, Peter L. (1998). History of the coelacanth fishes. London: Chapman & Hall. p. 434. ISBN9780412784804.
^ abMutter, Raoul J.; Cartanyà, Joan; Basaraba, Susan A. U. (2008). "New evidence of Saurichthys from the Lower Triassic with an evaluation of early saurichthyid diversity". In G. Arratia; H.-P. Schultze; M. V. H. Wilson (eds.). Mesozoic fishes 4. Homology and phylogeny. München: Dr. Friedrich Pfeil. pp. 103–127.
Greenland
