USNM 18118a (Ordovician of the United States)

Where: California (41.4° N, 122.8° W: paleocoordinates 1.4° S, 74.6° W)

• outcrop-level geographic resolution

When: 5 Member (Horseshoe Gulch Formation), Ashgill (449.5 - 443.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

• Limestone lens

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Collection methods: bulk, hydrochloric

Primary reference: A. W. Potter. 1990. Middle and Late Ordovician brachiopods from the eastern Klamath Mountains, northern California. Palaeontographica Abteilung A 212(1-6):31-158 [A. Miller/S. Kolbe]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 100543: authorized by Arnold Miller, entered by Sarah Kolbe on 10.12.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Hesperomenidae
Anoptambonites myriomorpheus n. sp. Potter 1990
[Anoptambonites myiomorpheus]
Rhynchonellata
 Orthida - Hesperorthidae