MF-12A. 1.6 km north of Crump (Ordovician of the United States)

Also known as East side of county road U.

Where: Cape Girardeau County, Missouri (37.3° N, 89.8° W: paleocoordinates 25.3° S, 76.3° 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 75551: authorized by Pete Wagner, entered by Pete Wagner on 16.10.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Polehemia sp.
Tergomya
 Tryblidiida - Tryblidiidae
Proplina ? grandis
Proplina ? grandis Cullison 1944
Cephalopoda
  -
Cephalopoda "gen. et. sp. indet."
Rostroconchia
 Conocardiida - Eopteriidae
Eopteria cf. richardsoni
Gastropoda
 Euomphalina - Macluritidae
"Maclurites smithvillensis" = Teiichispira ponderosa
"Maclurites smithvillensis" = Teiichispira ponderosa Billings 1865 snail
 Euomphalina - Raphistomatidae
Ceratopea indet., Ceratopea cf. depressa, Ceratopea unguis
Ceratopea indet. Ulrich 1911 snail
shell
Ceratopea cf. depressa Butts 1926 snail
Ceratopea unguis Yochelson and Bridge 1957 snail
43 opercula, 5 shells
 Euomphalina - Helicotomidae
? Lophonema indet., Lophonema sp., Lophonema cf. circumlirata, Lophonema taneyensis
? Lophonema indet. Purdue and Miser 1916 snail
Lophonema sp. Purdue and Miser 1916 snail
Lophonema cf. circumlirata Whitfield 1886 snail
Lophonema taneyensis Cullison 1944 snail
 Murchisoniina - Straparollinidae
Straparollina cassina
Straparollina cassina Whitfield 1886 snail
 Murchisoniina - Eotomariidae
Clathrospira indet., Clathrospira virguncula, Turritoma sp., "Murchisonia (Turritoma) cf. acrea" = Turritoma acrea
Clathrospira indet. Ulrich and Scofield 1897 snail
Clathrospira virguncula Billings 1865 snail
Turritoma sp. Ulrich and Scofield 1897 snail
"Murchisonia (Turritoma) cf. acrea" = Turritoma acrea Billings 1865 snail
 Murchisoniina - Lophospiridae
Lophospira sp., Lophospira perangulata
Lophospira sp. Whitfield 1886 snail
Lophospira perangulata Hall 1847 snail
 Murchisoniina - Hormotomidae
? Hormotoma indet., ? Hormotoma sp., Hormotoma cf. artemesia, Hormotoma cf. confusa, Hormotoma cf. anna
? Hormotoma indet. Salter 1859 snail
? Hormotoma sp. Salter 1859 snail
Hormotoma cf. artemesia Billings 1865 snail
Hormotoma cf. confusa Whitfield 1889 snail
Hormotoma cf. anna Billings 1859 snail
Ostracoda
 Leperditicopida - Leperditiidae
? Eoleperditia "sp. A", ? Eoleperditia indet.
? Eoleperditia "sp. A" Swartz 1949 ostracod
? Eoleperditia indet. Swartz 1949 ostracod
Trilobita
 Proetida - Bathyuridae
"? Goniotelina sp. n. sp." = Acidiphorus
"? Goniotelina sp. n. sp." = Acidiphorus Raymond 1925 trilobite
thorax & pygidium, & thoraxic segments