Kholbolzhin (PIN collection 1810) (Jurassic of Russian Federation)

Where: Buryatia, Russian Federation (51.3° N, 108.3° E: paleocoordinates 55.8° N, 108.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Ichetuy Formation, Oxfordian (163.5 - 157.3 Ma)

• Insect workers often assign a late Early Jurassic-early Middle Jurassic (or Toarcian-Aalenian) age but radiometric dating of Ichituy Fm volcanics gives ages of 159-156 Ma

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithified siliciclastic sediments

Size classes: macrofossils, mesofossils

Preservation: adpression

Collected by G.A. Dmitriev in 1960; reposited in the PIN

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 125229: authorized by Matthew Clapham, entered by Matthew Clapham on 07.03.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Plecoptera -
Perlomimus multus n. gen. n. sp.2
Perlomimus multus n. gen. n. sp.2 Sinitshenkova 1985 stonefly
PIN 1810/1-64
 Plecoptera - Siberioperlidae
Siberioperla lacunosa1 Sinitshenkova 1983 stonefly
PIN 1810/85
 Ephemeroptera - Siphlonuridae
Mesobaetis sibirica Brauer et al. 1889 mayfly
PIN 1810/65