USGS Mesozoic 2542, Redding quadrangle (Triassic of the United States)

Where: California (40.9° N, 122.1° W: paleocoordinates 13.6° N, 53.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Hosselkus Formation, Tuvalian (232.0 - 221.5 Ma)

• Fauna is late Carnian, characteristic of Smith's Juvavites subzone of the Tropites subbullatus zone at Brock Mountain.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by Diller, Stanton, Storrs, Hess in 18, 1902; reposited in the USGS

Primary reference: M. Gordon. 1966. An Upper Triassic bactritoid cephalopod from California. Journal of Paleontology 40:1220-1222 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 136302: authorized by Matthew Clapham, entered by Matthew Clapham on 25.11.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Aulacoceratida - Xiphoteuthididae
 Bactritida - Bactritidae
Dillerites shastensis n. gen. n. sp.
Dillerites shastensis n. gen. n. sp. Gordon 1966
 Ceratitida - Tropitidae
"Tropites johnsoni" = Margaritropites johnsoni, Discotropites laurae, "Discotropites empedoclis" = Discotropites plinii
"Tropites johnsoni" = Margaritropites johnsoni Smith 1927 ceratite
Discotropites laurae Mojsisovics 1893 ceratite
sensu Smith
"Discotropites empedoclis" = Discotropites plinii Mojsisovics 1893 ceratite
sensu Smith
 Ceratitida - Juvavitidae
"Juvavites kellyi" = Goniojuvavites kellyi Smith 1927 ceratite
Juvavites knowltoni Smith 1927 ceratite
 Phylloceratida - Ussuritidae
Metatirolites subpygmaeus Mojsisovics 1893 ammonite
sensu Smith