Karcher quarry, Lorentzen (Triassic of France)

Where: France (49.0° N, 7.2° E: paleocoordinates 13.9° N, 17.9° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Calcaire à Entroques Formation, Illyrian (247.2 - 242.0 Ma)

• Late Anisian, late Illyrian, upper Muschelkalk. The earliest ceratite recovered from the upsection Calcaire à Ceratites in the Lorentzen quarry is a specimen attributed to Ceratites transgressor, a species indicative of the late Anisian (late Illyrian) upper robustus biozone (Urlichs 2009). The most common ceratite in the Lorentzen quarry is C. evolutus, index of the evolutus biozone which is still of late Illyrian age. This data corresponds with the general Upper Muschelkalk stratigraphy in East France and the upper boundary of the Calcaire à Entroques in the lower robustus or pulcher biozones (Duringer and Hagdorn 1987). Hence, the new echinoid from an unidentified bed within the Calcaire à Entroques is older than upper robustus biozone and younger than Middle Muschelkalk and thus of Middle Triassic (late Anisian, late Illyrian) age.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, shelly/skeletal packstone

• Thickly bedded crinoidal limestones

Size class: macrofossils

Collection methods: Repository: Muschelkalkmuseum Ingelfingen, Germany

Primary reference: B. Thuy, H. Hagdorn, and A. S. Gale. 2017. Paleozoic echinoderm hangovers: waking up in the Triassic. Geology 45:531-534 [M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 187349: authorized by Matthew Clapham, entered by Matthew Clapham on 21.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Echinoidea
 Cidaroida - Triadotiaridae
 Palaechinoidea - Proterocidaridae
Lazarechinus mirabeti n. gen. n. sp.
Lazarechinus mirabeti n. gen. n. sp. Hagdorn 2018 sea urchin
Crinoidea
 Encrinida - Encrinidae
Encrinus liliiformis Lamarck 1801 Sea lily