ammonites
Cardiola agno figusi Comm., Uppermost Wenlock to Lowermost Ludlow, SW Sardinia (Silurian to of Italy)

Where: Sardinia, Italy (39.4° N, 8.5° E: paleocoordinates 61.0° S, 53.3° E)

• coordinate based on political unit

• local area-level geographic resolution

When: M. colonus zone, Fluminimaggiore Formation, Homerian to Homerian (426.2 - 421.3 Ma)

• In this study, isolated blocks were correlated on basis of contained conodonts.Fluminimaggiore Fm., uppermost Wenlock to lowermost Ludlow (M. colonus Biozone).

• member-level stratigraphic resolution

Environment/lithology: marine; lime mudstone and calcareous shale

• "Mostly disarticulated...bivalves...Population densities high...Abundant nektobenthic cephalopods represented a substrate for the abundant epibyssate bivalves. Micritic sediment was also a suitable habitat for infaunal bivalves..."
• 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: "dark micritic lenticular limestone which originally formed a level in the calcareous shales"

Collection methods: Table 2 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 26177: authorized by Michael Foote, entered by Michael Foote on 07.10.2002