Locality 6, Hillyard's Canyon, Zone "G(2)a" (Ordovician of the United States)

Where: Franklin County, Idaho (42.1° N, 111.6° W: paleocoordinates 7.5° S, 80.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Protopliomerella contracta trilobite zone, Garden City Formation, Tulean (480.8 - 474.9 Ma)

• 498 feet above base of formation. Zone G(2)a. (This might be the upper bound of Ordovician 1)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithology not reported

• Based on description of Garden City Formation from other sections in same reference.

Size classes: macrofossils, mesofossils

Preservation: replaced with silica

Collected by R. J. Ross, Jr. in 1946-1947; reposited in the YPM

Collection methods: chemical,

Primary reference: R. J., J.r. Ross. 1951. Stratigraphy of the Garden City Formation in northeastern Utah, and its trilobite faunas. Yale Peabody Museum of Natural History Bulletin 6:1-161 [S. Finnegan/S. Finnegan/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 103820: authorized by Melanie Hopkins, entered by Melanie Hopkins on 02.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Proetida - Bathyuridae
? Licnocephala sp., Licnocephala bicornuta n. sp., "Macropyge gladiator n. sp." = Gladiatoria gladiator
? Licnocephala sp. Ross 1951 trilobite
Licnocephala bicornuta n. sp. Ross 1951 trilobite
"Macropyge gladiator n. sp." = Gladiatoria gladiator Ross 1951 trilobite
 Proetida - Hystricuridae
Psalikilus typicum n. sp. Ross 1951 trilobite
 Asaphida - Asaphidae
Aulacoparia sp. Hintze and Jaanusson 1956 trilobite
reidentification of subset of specimens previously assigned to Macropyge gladiator from this collection
 Asaphida - Remopleurididae
Scinocephalus solitecti n. sp. Ross 1951 trilobite
Menoparia genalunata Ross 1951 trilobite
 Corynexochida - Illaenuridae
"? Platycolpus sp." = Rasettia
"? Platycolpus sp." = Rasettia Lochman 1953 trilobite