Cardiola docens Comm., Ludlow, SW Sardinia (Silurian to of Italy)

Where: Sardinia, Italy (39.5° N, 8.5° E: paleocoordinates 61.7° S, 54.1° E)

• coordinate estimated from map

• local area-level geographic resolution

When: M. fritschi linearis zone, Fluminimaggiore Formation, Gorstian to Gorstian (427.4 - 423.0 Ma)

• In this study, isolated blocks were correlated on basis of contained conodonts. Fluminimaggiore Fm., Ludlow, fritschi linearis Biozone. All species save Mila parvula n. sp. also occur in Bohemia at same level.

• member-level stratigraphic resolution

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

• "Abundant nektobenthic orthocone cephalopod shells are characteristic and are commonly oriented by surface current activity...High density and diversity...Epibyssates dominant. The presence of infaunal forms...documents somewhat similar conditions to those in which the Slava cubicula-Cardiola docens Comm. flourished in the Prague Basin."
• 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: "Mostly disarticulated shells occur in the grey to dark micritic and biomicritic or unsorted biodetrital limestones which form larger lenticular horizons within the sequence of calcareous shales."

Collection methods: Table 5 gives numerical abundances and inferred life habits of bivalves.

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 26181: authorized by Michael Foote, entered by Michael Foote on 07.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Mercycloceras declive
Ostracoda
 Cypridinida - Bolbozoidae
Bolbozoe bohemica, "Entomis migrans" = Entomozoe
"Entomis migrans" = Entomozoe ostracod
Bivalvia
 Modiomorphida - Modiomorphidae
Butovicella galemmu, Butovicella aff. migrans, Modiolopsis sp.
Butovicella aff. migrans Barrande 1881 clam
Modiolopsis sp. Hall 1847 clam
 Cyrtodontida - Slavidae
Slava cuvicula, Slava sathon
Slava sathon Kríž 1985 clam
 Cyrtodontida - Cardiolidae
Cardiola docens, Cardiola consanguis
 Cyrtodontida - Antipleuridae
Dualina sp.
Dualina sp. Barrande 1881 clam
 Cyrtodontida - Spanilidae
Spanila aspirans, Spanila aff. cuneus
 Cyrtodontida - Stolidotidae
Mila sp., Mila parvula
Mila sp. Barrande 1881 clam
Mila parvula Kříž and Serpagli 1993 clam
 Myalinida - Lunulacardiidae
Patrocardia aff. calva
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Cephalopoda
 Lituitida - Sphooceratidae
Sphooceras truncatum
Sphooceras truncatum Barrande 1860
 Dissidocerida - Geisonoceratidae
Columenoceras agassizi
 Orthocerida - Orthoceratidae
Michelinoceras michelini
 Orthocerida - Sphaerorthoceratidae
"Sphaerorthoceras" beatum, Akrosphaerorthoceras gregale
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
Graptolithina
  -
Graptolithina indet.