Ust-Baley Locality (PIN collection 1604) (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.P. Kolosintsyn in 1960; reposited in the PIN

• Collector interpreted from parallel lists

Primary reference: N. D. Sinitshenkova. 1985. Jurskie podenki (Ephemerida-Ephemeroptera) yuzhnoy Sibiri i zapadnoy Mongolii. In A. P. Rasnitsyn (ed.), Jurskie Nasekomye Sibiri i Mongolii 11-23 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 125227: authorized by Matthew Clapham, entered by Matthew Clapham on 07.03.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Hemiptera - Naucoridae
Irkutonecta longiclavalis2 Popov 1985 creeping water bug
PIN 1604/20
 Hemiptera - Notonectidae
Notonectidae indet.2 Latreille 1802 true bug
PIN 1604/21
 Coleoptera -
Angarolarva aquatica n. gen. n. sp.1
Angarolarva aquatica n. gen. n. sp.1 Ponomarenko 1985 beetle
PIN 1604/8
 Ephemerida - Mesonetidae
Mesoneta antiqua3 Brauer et al. 1889 mayfly
PIN 1605/1-6 (not including 3, according to Sinitshenkova, 1985)
 Ephemeroptera - Siphlonuridae
Mesobaetis sibirica Brauer et al. 1889 mayfly
PIN 1604/3