DH1-11, Disappointment Hills, Confusion Range (Triassic of the United States)

Where: Utah (39.4° N, 113.7° W: paleocoordinates 10.0° N, 38.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Owenites beds ammonoid zone, Thaynes Formation, Smithian (251.3 - 247.2 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified limestone

• Thin limestone bed within dominantly mudstone section

Size class: macrofossils

Preservation: cast

Collection methods: Repository: CNRS Biogéosciences, Université de Bourgogne (UBGD)

Primary reference: A. Brayard, K. G. Bylund, J. F. Jenks, D. A. Stephen, N. Olivier, G. Escarguel, E. Fara and E. Vennin. 2013. Smithian ammonoid faunas from Utah: implications for Early Triassic biostratigraphy, correlation and basinal paleogeography. Swiss Journal of Palaeontology 132:141-219 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 156023: authorized by Matthew Clapham, entered by Matthew Clapham on 07.05.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ceratitida - Aspenitidae
Aspenites acutus Hyatt and Smith 1905 ceratite
 Ceratitida - Hedenstroemiidae
Hedenstroemia kossmati Hyatt and Smith 1905 ceratite
 Ceratitida - Inyoitidae
Inyoites oweni Hyatt and Smith 1905 ceratite
 Ceratitida - Dieneroceratidae
Dieneroceras dieneri Hyatt and Smith 1905 ceratite
 Ceratitida - Proptychitidae
? Xiaoqiaoceras americanum n. sp. Brayard et al. 2013 ceratite
 Ceratitida - Meekoceratidae
Juvenites cf. thermarum Smith 1927 ceratite
 Ceratitida - Ussuriidae
Parussuria compressa Hyatt and Smith 1905 ceratite
 Ceratitida - Lanceolitidae
Lanceolites bicarinatus Smith 1932 ceratite
Lanceolites compactus Hyatt and Smith 1905 ceratite
 Ceratitida - Xenoceltitidae
Xenoceltites cordilleranus Smith 1932 ceratite