Layer F, Saint-Chinian, Montagne Noire (Ordovician of France)

Also known as Saint Chinian Faunizone F

Where: Languedoc-Roussillon, France (43.4° N, 3.0° E: paleocoordinates 60.3° S, 101.4° E)

• coordinate based on nearby landmark

When: Euloma filacovi trilobite zone, F Member (Saint-Chinian Formation), Tremadocian (485.4 - 477.7 Ma)

• faunizone “F” = IGCP TS 1c-d

•Was Schistes de Saint-Chinian, Layer F

Environment/lithology: deep subtidal shelf; gray claystone and lithified, bioturbated, nodular siltstone

• a monotonous succession of dark-grey claystones, and green siltstones with fine to mediumgrained sandstone intercalations and silicious nodules reaching a thickness greater than 500 m. Although the sandstone intercalations are often graded and exhibit erosive bases, bioturbation is common and primary sedimentary features are often lacking (Alvaro et al.2003).

Size class: macrofossils

Preservation: cast, original aragonite

Reposited in the AMNH

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 101705: authorized by Björn Kröger, entered by Björn Kröger on 30.12.2010, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• FSL specimens
Gastropoda
 Bellerophontida - Sinuitidae
Sinuites sowerbyi4 Perner 1903 snail
"Environs de Saint-Chinian"
 Bellerophontida - Tropidodiscidae
Peelerophon oehlerti4 Bergeron 1889 snail
"Environs de Saint-Chinian"
Cephalopoda
 Orthocerida - Baltoceratidae
 Ellesmerocerida - Rioceratidae
Rioceras escandei Thoral 1935
 Ellesmerocerida - Eothinoceratidae
Saloceras murvielense Kröger and Evans 2011
Somasteroidea
  - Chinianasteridae
Chinianaster levyi n. gen. n. sp.3 Thoral 1935
Thoralaster spiculiformis n. gen. n. sp.1 Dean Shackleton 2005
Among specimens originally id'ed as Chinianaster levyi
Villebrunaster thorali2 Spencer 1951
Among specimens originally id'ed as Chinianaster levyi
Stenuroidea
 Proturina - Eophiuridae
"Palaeura jacobi n. sp." = Pradesura jacobi3
"Palaeura jacobi n. sp." = Pradesura jacobi3 Thoral 1935