Simbirtsit 140, Malye Undory village on the Volga shore (Jurassic of Russian Federation)

Where: Ul'yanovsk, Russian Federation (54.3° N, 48.7° E: paleocoordinates 49.0° N, 50.4° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Aulacostephanus mutabilis ammonoid zone, Late/Upper Kimmeridgian (155.7 - 150.8 Ma)

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collected in 1982

Primary reference: G. W. Storrs, M. S. Arkhangel'skii, and V. M. Efimov. 2000. Mesozoic marine reptiles of Russia and other former Soviet republics. In M. J. Benton, M. A. Shishkin, D. M. Unwin, E. N. Kurochkin (eds.), The age of dinosaurs in Russia and Mongolia 187-210 [R. Benson/R. Benson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 138035: authorized by Roger Benson, entered by Roger Benson on 04.01.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ichthyosauria - Ophthalmosauridae
Ophthalmosaurus undorensis n. sp. Efimov 1991 ichthyosaur