Irganay, Dagestan (talus below Tsudakhar Fm) (Jurassic to of Russian Federation)

Where: Russian Federation (42.6° N, 46.9° E: paleocoordinates 38.1° N, 52.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tsudakhar Formation, Humphresianum to Humphresianum (171.6 - 167.7 Ma)

• Blagdeni subzone (Humphriesianum zone) - Subfurcatum zone

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

Size class: macrofossils

Collection methods: Repository: Vserossiyskiy Nauchno-Issledovatel'skiy Geologicheskiy Neftyanoy Institut (VNIGRI)

Primary reference: N. V. Besnosov and V. V. Mitta. 1993. Pozdnebayosskie i Batskie Ammonitidy Severnogo Kavkaza i Sredney Azii 1-347 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 187409: authorized by Matthew Clapham, entered by Matthew Clapham on 25.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Oppeliidae
Oppelia (Oecotraustes) gratus n. sp. Mitta 1993 ammonite
Oppelia (Oppelia) subradiata d'Orbigny 1823 ammonite
Oppelia (Oppelia) flexa Buckman 1924 ammonite
 Ammonitida - Sphaeroceratidae
Sphaeroceras brongniarti Sowerby 1818 ammonite