Wellington (Oligocene of Australia)

Where: South Australia, Australia (35.3° S, 139.5° E: paleocoordinates 50.1° S, 135.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Ettrick Formation, Chattian (28.1 - 23.0 Ma)

• "Interestingly, a tooth of the Oligocene shark Carcharodon angustidens. collected at Tailem Bend in 1936, has the same dark preservation as the Metasqualodon and Hexanchus teeth, and other shark teeth from reducing sediments, and adds support for the provenance of Metasqualodon being the Ettrick Formation." (Pledge & Rothausen, 1977). Associated plankton include Turborotalia euapertura, Guembelitria triseriata and Chiloguembelina cubensis, suggesting a Late Oligocene (P21 Zone) age (Gallagher & Gourley, 2007). Metasqualodon teeth likely came from the upper part of the unit (Pledge & Rothausen, 1977).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; glauconitic, gray, green marl

• Described as "yellow calcareous clay" but unit is actually a greenish-gray glauconitic marl (yellowish calcareous clay is the overlying Miocene Mannum Fm).

Size class: macrofossils

Preservation: original phosphate

Collection methods: surface (in situ),

Primary reference: E. B. Sanger. 1881. On a molar tooth of Zeuglodon from the Tertiary beds on the Murray River near Wellington, S.A. Proceedings of the Linnean Society of New South Wales 5:298-301 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45792: authorized by Mark Uhen, entered by Mark Uhen on 02.12.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Sanger lists an associated invertebrate fauna, but it may have been derived from a different unit (Pledge & Rothausen, 1977) and the identifications are outdated and questionable.
Chondrichthyes
 Hexanchiformes - Hexanchidae
"Notidanus primigenius" = Notorhynchus primigenius, Hexanchus agassizi
"Notidanus primigenius" = Notorhynchus primigenius Agassiz 1843 sevengill shark
Hexanchus agassizi sixgill shark
 Lamniformes - Otodontidae
"Carcharodon angustidens" = Otodus (Carcharocles) angustidens
"Carcharodon angustidens" = Otodus (Carcharocles) angustidens Agassiz 1843 mackerel shark
 Lamniformes - Odontaspididae
"Lamna elegans" = Odontaspis macrota
"Lamna elegans" = Odontaspis macrota Agassiz 1843 sand tiger shark
Mammalia
 Pelagiceti -
"Zeuglodon harwoodii n. sp." = Metasqualodon harwoodi
"Zeuglodon harwoodii n. sp." = Metasqualodon harwoodi Sanger 1881 whale