USNM 18169. Horsehoe Gulch (Ordovician of the United States)

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

• outcrop-level geographic resolution

When: Kangaroo Creek Formation, Ashgill (449.5 - 443.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

• limestone lense

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Collection methods: bulk, hydrochloric

Primary reference: D. M. Rohr. 1980. Ordovician - Devonian Gastropoda from the Klamath Mountains, California. Palaeontographica Abteilung A 171:141-199 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 69241: authorized by Pete Wagner, entered by Pete Wagner on 21.02.2007, edited by Sarah Kolbe

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Murchisoniina - Eotomariidae
Liospira modesta Ulrich and Scofield 1897 snail
Demospongiae
 Verticillitida - Colospongiidae
Corymbospongia adnata Rigby and Potter 1986 demosponge
 Agelasida - Thaumastocoeliidae
Girtyocoelia epiporata Rigby and Potter 1986 demosponge
 Agelasida - Aphrosalpingidae
Cystothalamiella ducta Rigby and Potter 1986 demosponge
 Agelasida - Preperonidellidae
Imperatoria mega Rigby and Potter 1986 demosponge
Imperatoria minima Rigby and Potter 1986 demosponge
Imperatoria media Rigby and Potter 1986 demosponge
 Agelasida - Cliefdenellidae
"Cliefdenella obconica" = Rigbyetia obconica
"Cliefdenella obconica" = Rigbyetia obconica Rigby and Potter 1986 demosponge
 Agelasida - Sebargasiidae
Amblysiphonella grossa Rigby and Potter 1986 demosponge