Cheiopteria-Patrocardia-Cardiolinka Comm., Uppermost Pridoli, SW Sardinia (Silurian of Italy)

Where: Sardinia, Italy (39.5° N, 8.5° E: paleocoordinates 58.8° S, 51.6° E)

• coordinate estimated from map

• local area-level geographic resolution

When: M. transgrediens zone, Fluminimaggiore Formation, Pridoli (423.0 - 419.2 Ma)

• In this study, isolated blocks were correlated on basis of contained conodonts. L. elegans detorta conodont Subzone.

• member-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal wackestone and calcareous shale

• "Semi-infaunal and infaunal bivalves are predominant...adapted to soft bottom...cephalopod shells provide substrate for epibyssate bivalves..." [Dualina-C.-Praecardium Comm. in Bohemia said to be similar but to lack epibyssate forms.]
• General for this formation: "45-50 m thick alternation of black calcareous lenticular layers (peloid-cephalopod-ostracod wackestone-packstones grading to mudstones) with dark non calcareous pelites and shales. The upper part of the formation is characterized by more marly limestones and terminates with a crinoid bioclastic packstone horizon."

•For this community: "Disarticulated shells occur in large nodules of the dark micritic to biomicritic limestones which form a horizon in the calcareous shales."

Collection methods: Table 10 gives numerical abundances and inferred life habits of bivalves. Similar to PBDB coll. 26173, but that list has fewer bivalves and this one has fewer cephalopods.

Primary reference: J. Kříž and E. Serpagli. 1993. Upper Silurian and lowermost Devonian Bivalvia of Bohemian type from south-western Sardinia. Bolletino della Societa Paleontologica Italiana 32(3):289-347 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26187: authorized by Michael Foote, entered by Michael Foote on 07.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Cephalopoda
 Orthocerida - Arionoceratidae
"Arionoceras affine" = Arionoceras canonicum Meneghini 1843
 Orthocerida - Orthoceratidae
 Orthocerida - Sphaerorthoceratidae
Bivalvia
 Cyrtodontida - Cardiolidae
 Cyrtodontida - Antipleuridae
 Myalinida - Lunulacardiidae
 Ostreida - Pterineidae
Leptodesma sp. Hall 1883 oyster
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Malacostraca
 Archaeostraca - Ceratiocarididae
Ostracoda
 Palaeocopida - Beyrichiidae
 Cypridinida - Bolbozoidae
Bolbozoe sp. Barrande 1872 ostracod
Trilobita
 Trinucleida - Raphiophoridae
Raphiophorus sp. Angelin 1854 trilobite