Layer G, Prades-sur-Vernazobres, school (Ordovician of France)

Where: Languedoc-Roussillon, France (43.4° N, 3.0° E: paleocoordinates 60.2° S, 101.4° E)

• coordinate based on nearby landmark

When: Asaphelina barroisi berardi-Taihungshania miqueli trilobite zone, Niveau G Member (Schistes de Saint-Chinian Formation), Tremadocian (485.4 - 477.7 Ma)

• Asaphelina barroisi berardi þ Taihungshania miqueli subzone ¼ faunizone “G”= IGCP 410 TS 1c-d, latest Tremadocian. Was given as Couches de la Maurerie, but Layer G is Schistes de Saint-Chinian

Environment/lithology: deep subtidal shelf; nodular, black, silty, cherty/siliceous shale and sandstone

• a succession consisting of an alternation of sandstones and shales bearing centimetric scale siliceous nodules

Size class: macrofossils

Preservation: cast, original aragonite

Primary reference: B. Kröger and D. H. Evans. 2011. Review and paleoecological analysis of the late Tremadocian – early Floian (Early Ordovician) cephalopod fauna of the Montagne Noire, France. Fossil Record 14(1):5-34 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 101706: authorized by Björn Kröger, entered by Björn Kröger on 30.12.2010, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculida - Praenuculidae
Synek thorali n. sp. clam
Cephalopoda
 Orthocerida - Baltoceratidae
 Dissidocerida - Troedssonellidae
Thoraloceras bactritoides Kröger and Evans 2011
 Endocerida - Proterocameroceratidae
Lobendoceras undulatum Kröger and Evans 2011
 Ellesmerocerida - Rioceratidae
Rioceras escandei Thoral 1935