Ust-Baley Locality (Zemcuznikov collection) (Jurassic of Russian Federation)

Also known as Ust-Balei

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 Zemcuznikov in 1925

• Martynov says specimens are in the Collection of the Geologic Committee, Leningrad

Primary reference: A. V. Martynov. 1927. Jurassic Fossil Mecoptera and Paratrichoptera from Turkestan and Ust-Balei (Siberia). Izvestiya Akademii Nauk SSSR 21(7-8):651-666 [M. Clapham/J. Karr/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 114694: authorized by Matthew Clapham, entered by Jered Karr on 21.08.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hemiptera - Palaeontinidae
"Pseudocossus zemcuznicovi n. gen. n. sp." = Martynovocossus zemcuznicovi
"Pseudocossus zemcuznicovi n. gen. n. sp." = Martynovocossus zemcuznicovi Martynov 1931 true bug
 Mecoptera - Orthophlebiidae
Mesopanorpa incerta n. sp. Martynov 1927 scorpionfly
Mesopanorpa angarensis n. sp. Martynov 1927 scorpionfly