River Dorches, northwest of Orbagnoux mine (Jurassic of France)

Where: France (46.0° N, 5.8° E: paleocoordinates 36.9° N, 15.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Late/Upper Kimmeridgian (155.7 - 150.8 Ma)

• Yellow lithographic layers situated three meters above the plant layers.

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified lime mudstone

• These lithographic and bituminous limestones (Late Kimmeridgian “calcaire en plaquettes” Formation) correspond to a marine shallow lagoonal environment. The formation of these carbonate deposits are due to the development of microbial mats ("kopara" Tribovillard et al., 1999; Tribovillard et al., 2000). These authors indicated that the palaeoenvironment corresponds to a lagoon delimited by a reef barrier and to islands occupied by terrestrial organisms.

Size class: macrofossils

Preservation: adpression

Reposited in the MNHN

• Collected during two field trips during 2012 and 2013, with the help of the Société des Naturalistes et Archéologues de l’Ain and the Groupe "Sympetrum" (Recherche et Protection des Libellules)

Primary reference: A. Nel, P. Nel, R. Krieg-Jacquier, J. M. Pouillon, and R. Garrouste. 2014. Exceptionally preserved insect fossils in the Late Jurassic lagoon of Orbagnoux (Rhône Valley, France). PeerJ 2(e510):1-16 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 161187: authorized by Matthew Clapham, entered by Matthew Clapham on 02.09.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Hemiptera - Mesoveliidae
Gallomesovelia grioti n. gen. n. sp.
Gallomesovelia grioti n. gen. n. sp. Nel et al. 2014 water treader
MNHN.F.A51098