Akhvakhshtab, Dagestan (upper middle Tsudakhar Fm) (Jurassic of Russian Federation)

Where: Russian Federation (42.6° N, 46.3° E: paleocoordinates 37.7° N, 52.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Zigzag ammonoid zone, Tsudakhar Formation, Early/Lower Bathonian (167.7 - 164.7 Ma)

• Upper middle Tsudakhar subsvita

• 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 187366: authorized by Matthew Clapham, entered by Matthew Clapham on 24.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Lissoceratidae
Lissoceras (Lissoceras) psilodiscus Schloenbach 1865 ammonite
Assumed to be "Gora Batselo" in text
 Ammonitida - Stephanoceratidae
"Parkinsonia neuffensis" = Parkinsonia (Durotrigensia) neuffensis
"Parkinsonia neuffensis" = Parkinsonia (Durotrigensia) neuffensis Oppel 1857 ammonite
 Ammonitida - Perisphinctidae