Where: Franklin County, Missouri (38.2° N, 91.1° W: paleocoordinates 23.4° S, 80.7° W)
• outcrop-level geographic resolution
When: Gasconade Formation, Tremadoc (486.5 - 477.7 Ma)
• The Van Buren Formation (Bridge 1930) is now referred to in an interval sense with the Van Buren fauna comprising a zone in the lowerpart of the Gasconade Formation. The chert in which the fossils occur may or may not be in place stratigraphically. So, a rating of "A" through "F" indicates stratigraphic reliability with "A" = no question to stratigraphic position of horizon and "F" = residual material of different ages. Reliability Index = E
• formation-level stratigraphic resolution
Environment/lithology: reef, buildup or bioherm
Preservation: original calcite, replaced with silica
Collection methods: Taxonomic list does not include stromatolites in which specimens were found.
Primary reference: B. L. Stinchcomb. 1986. New Monoplacophora (Mollusca) from Late Cambrian and Early Ordovician of Missouri. Journal of Paleontology 60(3):606-626 [M. Patzkowsky/P. Borkow/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 8943: authorized by Mark Patzkowsky, entered by Phil Borkow on 07.09.2000, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Tergomya | |
"Gasconadeoconus expansus" = Kirengella expansus
"Gasconadeoconus expansus" = Kirengella expansus Stinchcomb 1986 [entered as Gasconadeoconus expandus]
| |
Proplina cornutaformis Walcott 1879
Proplina meramecensis n. sp. Stinchcomb 1986 | |
Polyplacophora | |
Robustum nodum n. gen. n. sp., Robustum phallerium n. sp., Conodia levicosta n. gen. n. sp., "Conodia acuminata n. sp." = Chelodes acuminata, Hemithecella quinquelites n. sp., Hemithecella expansa
Robustum nodum n. gen. n. sp. Stinchcomb and Darrough 1995 chiton
Robustum phallerium n. sp. Stinchcomb and Darrough 1995 chiton
Conodia levicosta n. gen. n. sp. Stinchcomb and Darrough 1995 chiton
"Conodia acuminata n. sp." = Chelodes acuminata Stinchcomb and Darrough 1995 chiton
Hemithecella quinquelites n. sp. Stinchcomb and Darrough 1995 chiton
Hemithecella expansa Butts 1941 chiton |