Cheiopteria glabra Community, Prague Basin (Silurian of Czech Republic)

Where: Czech Republic (50.0° N, 14.3° E: paleocoordinates 51.0° S, 56.8° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Monograptus fritschi linearis zone, Ludfordian (425.6 - 423.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; gray, calcareous shale and lime mudstone

• "Low diveresity indicates generally unfavorable conditions [with only C. glabra dominant]...Deposit feeders absent...The environment was shallow water, below wave base, somewhat low oxygen content (relatively high free carbon content), very low or no current activity. Shells of C. glabra commonly cover the bedding planes. This was most probably caused by mass mortalities under abiotic conditions."
• "Mostly disarticulated shells occur in micritic limestones forming nodules in dark-gray calcareous shales with graptolites and rare ostracodes. The horizon...occurs just below the bank of biodetrital Lst with abundant cephalopods..."

Collection methods: Life modes and abundances given for bivalves. List based on taxa mentioned in text and tables 16.11 (Orthoceras Quarry) and 16.12 (Praha-Pankrac).

Primary reference: J. Kříž. 1999. Bivalvia communities of Bohemian type from the Silurian and Lower Devonian carbonate facies. in A. J. Boucot and J. D. Lawson, eds. Paleocommunities--a case study from the Silurian and Lower Devonian. Cambridge University Press, Cambridge. 229-252 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 14166: authorized by Michael Foote, entered by Michael Foote on 20.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Bivalves are focus of taxon list. Other taxa mentioned but not listed in detail.
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
 Cyrtodontida - Cardiolidae
 Cyrtodontida - Stolidotidae
Mila sp. Barrande 1881 clam
 Cyrtodontida - Spanilidae
Spanila sp. Barrande 1881 clam
 Cyrtodontida - Antipleuridae
Dualina sp. Barrande 1881 clam
Paracardium sp. Barrande 1881 clam
 Myalinida - Lunulacardiidae
 Pterioida -
Cheiopteria glabra Goldfuss 1837 clam
Cephalopoda indet. Cuvier 1797
 Cypridinida - Bolbozoidae
"Entomis migrans" = Entomozoe
"Entomis migrans" = Entomozoe ostracod
in the shales; genus name in quotes
Graptolithina indet. graptolite
in the shales