La Fouquelière, Ancenis Basin (Ordovician of France)

Where: France (47.4° N, 1.3° W)

• Paleocoordinates: 76.8° S, 10.8° W (Wright 2013)

• coordinate estimated from map

When: Pierre Melière Formation, Darriwilian (469.4 - 458.2 Ma)

• "Pierre Melière Formation, middle Darriwilian, Middle Ordovician"

• formation-level stratigraphic resolution

Environment/lithology: offshore; fine-grained, concretionary, micaceous siltstone and micaceous sandstone

• "At la Fouquelière (Mouzeil, Loire atlantique), the concretion-bearing fine micaceous siltstones and sandstones of the Pierre Melière Formation yielded a rare, low diversity invertebrate fauna dominated by a trilobite assemblage typical of the atheloptic biofacies (Cavet and Pillet, 1961, 1963, 1967, 1968; Chauvel and Nion, 1977;Henry, 1980, 1989; Vannier, 1986b; Pillet, 1992; Henry et al., 1997;Lefebvre et al., 2010). The occurrence of this atheloptic trilobite assemblage (sensu Fortey and Owens, 1987), along with the presence of the mitrate Lagynocystis both suggest relatively deep (outershelf, slope), dysoxic environmental conditions."

Size class: macrofossils

Collection methods: "Single specimen Université de Bretagne occidentale (Brest) LPB 15177"

Primary reference: D. B. Blake, T. E. Guensberg, and B. Lefebvre. 2016. New Early Paleozoic Asterozoa (Echinodermata) from the Armorican Massif, France, and the Western United States. Annales de Paléontologie 102:161-181 [P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 216843: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 28.12.2020

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Stylophora
 Mitrata -
Lagynocystis sp.
Asteroidea
 Euaxosida - Lepidasteridae
? Lepidactis sp.
? Lepidactis sp. Spencer 1918 sea star
Artiopoda
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite
atheloptic form