Ust-Baley Locality (PIN collection 1082) (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

Reposited in the PIN

Primary reference: A. G. Ponomarenko. 1985. Zhestkokrylye iz Yury Sibiri i zapadnoy Mongolii. In A. P. Rasnitsyn (ed.), Yurskie Nasekomye Sibiri i Mongolii 47-87 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 125476: authorized by Matthew Clapham, entered by Matthew Clapham on 10.03.2012

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 1082/5
 Coleoptera - Permosynidae
Hydrobiites crassus
Hydrobiites crassus Ponomarenko 1985 beetle
PIN 1082/1
 Coleoptera -
Allognosis nitens
Allognosis nitens Geinitz 1894 beetle
PIN 1082/3