MSM 101.1. Diversion Channel 0.8 km west of Ancell (Scott City) (Ordovician of the United States)

Where: Scott County, Missouri (37.2° N, 89.5° W: paleocoordinates 25.6° S, 76.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Middle Member (Dutchtown Formation), Cassinian (478.6 - 468.1 Ma)

• N. American Conodont zone 5 (middle Whiterockian)

• group of beds-level stratigraphic resolution

Environment/lithology: argillaceous limestone

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Collection methods: bulk, hydrochloric

Primary reference: M. F. Fix. 1975. The Paleontology and stratigraphy of the Smithville and Blackrock Formations of Southeastern Missouri. M.S. Thesis, Geology, Washington University 1-147 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 75554: authorized by Pete Wagner, entered by Pete Wagner on 16.10.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Ostracoda
 Leperditicopida - Leperditiidae
Isochilina variana Cullison 1938 ostracod
Bivalvia
 Modiomorphida - Modiomorphidae
Modiolopsis convexa Cullison 1938 clam
Gastropoda
 Murchisoniina - Straparollinidae
"Lophospira basicarinata n. sp." = Straparollina basicarinata, "Lophospira corrugata" = Straparollina cassina, "Lophospira dutchtownensis" = Straparollina cassina
"Lophospira basicarinata n. sp." = Straparollina basicarinata Cullison 1938 snail
"Lophospira corrugata" = Straparollina cassina Whitfield 1886 snail
"Lophospira dutchtownensis" = Straparollina cassina Whitfield 1886 snail
Stenolaemata
 Cystoporata - Ceramoporidae
Crepipora globulifera Cullison 1938
Conodonta
  - Archaeognathidae
Archeognathus primus n. gen. n. sp.
Archeognathus primus n. gen. n. sp. Cullison 1938 conodont