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Unda (PIN collection 3015) (Jurassic of Russian Federation)

Where: Chita, Russian Federation (51.7° N, 116.9° E: paleocoordinates 56.7° N, 117.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Glushkovo Formation, Tithonian (150.8 - 145.5 Ma)

• Given as Aptian-Albian? Balei series, but later papers give Hauterivian Gluskovo Formation.

Environment/lithology: lacustrine - small; lithified lithology not reported

• Unda was a typical Mesozoic lake of type "A" according to Sinitshenkova and Zherikhin (1996), a deep mountain lake formed when a river valley was naturally dammed. It was a cold oligotrophic water body with low primary production and ample oxygen. Transbaikal rift.

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression

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 123197: authorized by Matthew Clapham, entered by Matthew Clapham on 13.01.2012, edited by Jered Karr, Lindy Edwards and Amy Delelli

Creative Commons license: CC BY (attribution)