MF-20. 7.7 km south and 2.1 km west of Crump (Ordovician of the United States)

Also known as Roadcut, west side of county road N, immediately north of junction with county roads T & U.

Where: Cape Girardeau County, Missouri (37.2° N, 89.9° W: paleocoordinates 25.3° S, 76.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Smithville Formation, Cassinian (482.3 - 470.0 Ma)

• N. American E Fauna, Reutterodus andinus zone, middle Blackhillsian.

• group of beds-level stratigraphic resolution

Environment/lithology: 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 75559: authorized by Pete Wagner, entered by Pete Wagner on 16.10.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
Cephalopoda
  -
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
fragments
 Murchisoniina - Hormotomidae
Hormotoma indet. Salter 1859 snail
Hormotoma artemesia Billings 1865 snail
 Murchisoniina - Lophospiridae
Lophospiridae indet. Wenz 1938 snail
Lophospira perangulata Hall 1847 snail
 Murchisoniina - Eotomariidae
"Murchisonia (Turritoma) cf. acrea" = Turritoma acrea, Clathrospira virguncula
"Murchisonia (Turritoma) cf. acrea" = Turritoma acrea Billings 1865 snail
Clathrospira virguncula Billings 1865 snail
 Murchisoniina - Subulitidae
Fusispira obesus Whitfield 1886 snail
 Euomphalina - Raphistomatidae
Ceratopea unguis Yochelson and Bridge 1957 snail
6 opercula, 4 shells
Ceratopea ? wisei Fix 1975 snail
opercula
 Euomphalina - Helicotomidae
"Lophonema sp." = Lophonema, Lophonema cf. circumlirata, "Polhemia indet." = Lophonema
"Lophonema sp." = Lophonema Purdue and Miser 1916 snail
Lophonema cf. circumlirata Whitfield 1886 snail
"Polhemia indet." = Lophonema Purdue and Miser 1916 snail
Ostracoda
 Leperditicopida - Leperditiidae
? Eoleperditia "sp. A" Swartz 1949 ostracod
Trilobita
 Proetida - Bathyuridae
"Goniotelina indet." = Acidiphorus
"Goniotelina indet." = Acidiphorus Raymond 1925 trilobite
cranidia