Ust-Baley Locality (PIN collection 509) (Jurassic of Russian Federation)

Where: Irkutsk, Russian Federation (54.2° N, 100.3° E: paleocoordinates 61.8° N, 99.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ust' -Baleyskaya Member (Cheremkhovskaya Formation), Toarcian (182.7 - 174.1 Ma)

Environment/lithology: lacustrine - small; lithology not reported

• The Ust'-Baley palaeocenosis is a well-described Mesozoic "hypotrophic" lake (Zherikhin and Kalugina 1985), of type "B" according to Sinitshenkova and Zherikhin (1996). It was a small, shallow, permanent lake in a large river valley (but completely isolated from the river), with a low primary production and high oxygen concentration.

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collected by G.G. Martinson in 1958; reposited in the PIN

• Collector interpreted from parallel lists

Primary reference: O. A. Tshernova. 1969. New early Jurassic may-flies (Ephemeroptera, Epeoromimidae, Mesonetidae). Entomologicheskoe Obozrenie 48:153-161 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152595: authorized by Matthew Clapham, entered by Matthew Clapham on 26.11.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Ephemerida - Mesonetidae
Mesoneta antiqua
Mesoneta antiqua Brauer et al. 1889 mayfly
PIN 509/2-3
 Coleoptera - Dytiscidae
Angaragabus jurassicus
Angaragabus jurassicus Ponomarenko 1963 predaceous diving beetle
PIN 509/6