Niederschönthal, Liestal (Triassic of Switzerland)

Where: Basel-Landschaft, Switzerland (47.5° N, 7.7° E: paleocoordinates 33.4° N, 10.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Knollenmergel Formation (Keuper Group), Sevatian (212.0 - 205.6 Ma)

• 2.1 m below the Rhät, upper Middle Keuper; referred to the Upper "Zanclodon" Knollenmergel. The Knollenmergel of northern Switzerland is correlated with the Trossingen Formation of southern Germany (see Deutsche Stratigraphische Kommission 2005, Cour. Forsch.-Inst. Senckenberg, Table 6.2, pg. 272) which is considered late Norian (Sevatian) in age (Deutsche Stratigraphische Kommission 2005, Cour. Forsch.-Inst. Senckenberg)

•upper Middle Keuper, upper Norian, now = Trossingen Fm. and thus late Norian to Rhaetian age

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; gray, green, blue conglomerate

• "40 cm thick bed...that consists of a partly greenish gray and partly dirty violet conglomerate with bone fragments and fossil wood."

Size class: macrofossils

Collected by A. Gressly in 1856

Collection methods: quarrying, mechanical,

• discovered by Amanz Gressly

Primary reference: L. Rütimeyer. 1856. [Des Ossements gigantesques de reptiles] [Some gigantic reptile bones]. Bibliothèque Universelle de Genève, Archives des Sciences Physiques et Naturelles 33:53 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 47802: authorized by Matthew Carrano, entered by Matthew Carrano on 02.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

 Hybodontiformes - Hybodontidae
Hybodus sp.2 Agassiz 1837 elasmobranch
 Dipnoi - Ceratodontidae
Ceratodus sp.2 Agassiz 1838 lungfish
 Temnospondyli -
 Saurischia - Plateosauridae
Plateosauridae indet.2 Marsh 1895 plateosaurid
"small" plateosaurid
 Saurischia -
Gresslyosaurus ingens n. gen. n. sp.4
Gresslyosaurus ingens n. gen. n. sp.4 Rütimeyer 1856 prosauropod
NHM NB series
 Phytosauria -
"Mystriosuchus ruetimeyeri n. sp." = Angistorhinopsis ruetimeyeri3
"Mystriosuchus ruetimeyeri n. sp." = Angistorhinopsis ruetimeyeri3 Huene 1911 archosaur
Skull fragments, vertebrae, scutes and laterally compressed serrated teeth
 Sauropterygia -
Placodontia indet.2 Cope 1871 placodont
 Plesiosauria -
Plantae indet.1 Haeckel 1866
"fossil wood"