Hillside N of Sage Creek, Stewart Flat (Triassic of the United States)

Where: Idaho (42.7° N, 111.2° W: paleocoordinates 11.9° N, 35.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Columbites ammonoid zone, Thaynes Formation, Spathian (251.3 - 247.2 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; shale

Size class: macrofossils

Reposited in the MCZ

Primary reference: B. Kummel. 1969. Ammonoids of the late Scythian (Lower Triassic). Bulletin of the Museum of Comparative Zoology 137:311-702 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 213094: authorized by Alex Dunhill, entered by Bethany Allen on 25.08.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ceratitida - Columbitidae
"Tirolites astakhovi n. sp." = Marcouxia astakhovi
"Tirolites astakhovi n. sp." = Marcouxia astakhovi Kummel 1969 ceratite
USNM 153081 (holotype)
 Ceratitida - Albanitidae
"Svalbardiceras sheldoni n. sp." = Albanites sheldoni
"Svalbardiceras sheldoni n. sp." = Albanites sheldoni Kummel 1969 ceratite
MCZ 9493 (holotype)