USNM 18121. Rock quarry at A. P. Ranch (Ordovician of the United States)

Where: Siskiyou County, California (41.4° N, 122.7° W: paleocoordinates 1.1° S, 76.8° W)

• outcrop-level geographic resolution

When: 5 Member (Kangaroo Creek Formation), Caradoc (458.4 - 449.5 Ma)

• Clasts of Caradocian age given other indicators

• group of beds-level stratigraphic resolution

Environment/lithology: lithified conglomerate and limestone

• Carbonate with limestone clasts

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 69221: authorized by Pete Wagner, entered by Pete Wagner on 21.02.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Murchisoniina - Trochonematidae
"Trochonema (Eunema) cf. salteri" = Globonema niota
"Trochonema (Eunema) cf. salteri" = Globonema niota Hall 1861 snail
 Murchisoniina - Lophospiridae
"Loxoplocus (Lophospira) perangulata" = Lophospira perangulata, "Loxoplocus (Lophospira) cf. medialis" = Lophospira milleri, Ectomaria prisca
"Loxoplocus (Lophospira) perangulata" = Lophospira perangulata Hall 1847 snail
"Loxoplocus (Lophospira) cf. medialis" = Lophospira milleri Miller 1877 snail
Ectomaria prisca Billings 1859 snail
 Murchisoniina - Eotomariidae
Eotomaria "sp. A" Ulrich and Scofield 1897 snail
Paraliospira gradata Rohr 1980 snail
 Bellerophontida - Tropidodiscidae
? Temnodiscus euryomphalus Lindström 1884 snail
 Euomphalina - Helicotomidae
Boucotspira fimbriata Rohr 1980 snail
 Euomphalina - Platyceratidae
Strophomenata
 Strophomenida - Bimuriidae
Bimuria "sp. 2" Ulrich and Cooper 1942