MR-27. Northeast side of Johnyy Hollow, ½ mile west, 0.15 mil S of Berea Church (Ordovician of the United States)

Also known as Summersville Quadrangle NW¼ SE¼ sec. 8 f. 27 N., R.5W.

Where: Shannon County, Missouri (37.0° N, 91.5° W: paleocoordinates 23.6° S, 82.1° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Roubidoux Formation, Migneintian (485.4 - 478.6 Ma)

• Lower Jeffersonian

• bed-level stratigraphic resolution

Environment/lithology: lithified, cherty/siliceous limestone

Size class: macrofossils

Reposited in the USNM

Primary reference: R. L. Heller. 1954. Stratigraphy and paleontology of the Roubidoux Formation of Missouri. State of Missouri Department of Business and Administration, Division of Geological Survey and Water Resources 1-60 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 50202: authorized by Pete Wagner, entered by Pete Wagner on 10.05.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Euomphalina - Macluritidae
Macluritella stantoni Kirk 1927 snail
 Euomphalina - Ophiletidae
Lecanospira soluta n. sp. Heller 1954 snail
type locality
 Eogastropoda - Sinuopeidae
"Rhombella umbilicata" = Euconia umbilicata, "Jarlopsis conicus" = Euconia conicus
"Rhombella umbilicata" = Euconia umbilicata Dake and Bridge 1932 snail
"Jarlopsis conicus" = Euconia conicus Heller 1954 snail
 Murchisoniina - Hormotomidae
Plethospira extensa n. sp. Heller 1954 snail
type locality
Tergomya
 Tryblidiida - Tryblidiidae
Proplina elongata Cullison 1944
 Kiringellida - Hypseloconidae
Ozarkoconus prearcuatus n. gen. n. sp.
Ozarkoconus prearcuatus n. gen. n. sp. Heller 1954
type locality
 Hypseloconida -
Hypseloconus compressus Ulrich et al. 1931
Cephalopoda
 Tarphycerida - Tarphyceratidae
Campbelloceras overmani n. sp.
type locality