Col-du-Rulladou (Découverte Rive Droite), Graissessac (Carboniferous of France)

Where: France (43.7° N, 3.1° E: paleocoordinates 4.9° S, 16.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Stephanian C (301.0 - 300.4 Ma)

• Deposit intercalated between the Grand Pas and Burelle coal seams. Becq-Giraudon (1973) interpreted the plant assemblages as Stephanian B in age. However, they are now considered as typical of the Upper Stephanian according to the revision of the Saint-Etienne flora by Doubinger et al. (1995).

• group of beds-level stratigraphic resolution

Environment/lithology: wet floodplain; lithified siltstone

• Mudstone facies in a flood plain deposit. These rocks are interpreted as fine-grained overbank deposits formed by suspension-load deposition after flooding events. The Graissessac-Lodève basin is one of the southernmost intramontane rift-basins that developed during the Stephanian and early Permian in the French Massif Central due to the post-thickening collapse of the Hercynian Orogen.
• One scorpion fossil (GRA2495), embedded in a relatively coarse reddish siltstone, and three trigonotarbids (GRA2491, GRA2492, and MNHN.A52711), preserved in grey clayey siltstone

Size class: macrofossils

Preservation: adpression

Collected by C. Martin-Closas, J. Galtier; reposited in the MNHN

• Other repository: Paleobotanical collection, Service des collections de Paléontologie, Université Montpellier 2

Primary reference: M. Poschmann, J. A. Dunlop, O. Béthoux and J. Galtier. 2016. Carboniferous arachnids from the Graissessac Basin, Central Massif, France. PalZ 90:33-48 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 177540: authorized by Matthew Clapham, entered by Matthew Clapham on 02.04.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Arachnida
 Scorpiones - Eoscorpiidae
? Eoscorpius sp.
? Eoscorpius sp. Meek and Worthen 1868 scorpion
GRA2495
 Trigonotarbida -
Aenigmatarbus rasteli n. gen. n. sp.
Aenigmatarbus rasteli n. gen. n. sp. Poschmann et al. 2016
GRA2491, MNHN.A52711; GRA2492 tentatively referred