South of Porsayman Well, Bolshoi Balkhan (basal Chaloi Fm) (Jurassic of Turkmenistan)

Where: Turkmenistan (39.8° N, 54.5° E: paleocoordinates 36.7° N, 60.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Chaloi Formation, Subfurcatum (171.6 - 167.7 Ma)

• Base of the Chaloi Formation

• 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 187937: authorized by Matthew Clapham, entered by Matthew Clapham on 17.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Perisphinctidae
Bajocisphinctes (Bajocisphinctes) gurami Kakadze and Zeshashvili 1956 ammonite
Bajocisphinctes (Bajocisphinctes) ultimus Kakadze and Zeshavili 1955 ammonite