Ust-Baley (PIN collection 722) (Jurassic of Russian Federation)

Also known as Ust'-Balei

Where: Russian Federation (52.6° N, 104.0° E: paleocoordinates 61.1° N, 104.8° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Cheremkhovskaya Formation, Toarcian (182.7 - 174.1 Ma)

• group of beds-level stratigraphic resolution

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

Reposited in the PIN

Primary reference: L. V. Arnoldi, V. V. Zherikhin, L. M. Nikritin and A. G. Ponomarenko. 1977. Mezozoiskie zhestkokryiye. Akademiya Nauk SSSR, Trudy Paleontologicheskogo Instituta 161:1-204 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123146: authorized by Matthew Clapham, entered by Matthew Clapham on 12.01.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Ephemerida - Mesonetidae
Mesoneta utriculata
Mesoneta utriculata Sinitshenkova 1985 mayfly
PIN 722/13
 Coleoptera - Coptoclavidae
"Necronectes aquaticus n. gen. n. sp." = Timarchopsis aquaticus
"Necronectes aquaticus n. gen. n. sp." = Timarchopsis aquaticus Ponomarenko 1977 beetle
PIN 722/23