Layer 822A, Deşli Caira (Triassic of Romania)

Where: Romania (45.1° N, 28.8° E: paleocoordinates 17.4° N, 33.3° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Aegean (247.2 - 242.0 Ma)

• The high-resolution ammonoid biostratigraphy in the Deşli Caira section, accurately

•demonstrates that the Spathian/Aegean boundary is placed a little higher in the section than had been previously estimated by Grădinaru et al. (2007). It is now placed between the levels 821 and 822A. The topmost part of the level 821 (821A) yields the uppermost Spathian ammonoid assemblage, including Procarnites kokeni (Arthaber, 1908), Eogymnites arthaberi (Diener, 1915), Proptychitoides sp., Albanites sp., and others, whilst the level 822A yields a lowermost Aegean ammonoid assemblage, including Aegeiceras ugra (Diener, 1895), Paracrochordiceras sp., Japonites sp., Stenopopanoceras sp., Lenotropites sp., and others.

• bed-level stratigraphic resolution

Environment/lithology: lithified, red lime mudstone

• Above the OAB, the basal part of the lower Anisian is made up almost exclusively of thick bedded, brick-red coloured Hallstatt-type limestones, with only rare intercalations of "Posidonia" bearing reddish coquinoid limestones.

Size class: macrofossils

Collection methods: Repository: Museum of the Laboratory of Palaeontology in the University of Bucharest

Primary reference: E. Grădinaru and M. Gaetani. 2019. Upper Spathian to Bithynian (Lower to Middle Triassic) brachiopods from North Dobrogea (Romania). Rivista Italiana di Paleontologia e Stratigrafia 125:91-123 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 199553: authorized by Matthew Clapham, entered by Matthew Clapham on 30.01.2019, edited by Bethany Allen

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ceratitida - Japonitidae
Japonites sp. Mojsisovics 1893 ceratite
Aegeiceras ugra Diener 1895 ceratite
 Ceratitida - Longobarditidae
Lenotropites sp. Popov 1961 ceratite
 Ceratitida - Acrochordiceratidae
Paracrochordiceras sp. Spath 1934 ceratite
 Ceratitida - Parapopanoceratidae
Stenopopanoceras sp. Popov 1961 ceratite
Rhynchonellata
 Rhynchonellida - Norellidae
Ortarhynchia petersi Gaetani 2019
Norella kellneri Bittner 1892