Tchunia (Tchunku) River, Nizhniaya (Silurian of Russian Federation)

Where: Russian Federation (61.6° N, 90.1° E: paleocoordinates 17.8° N, 14.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Llandovery (443.4 - 433.4 Ma)

• STRATIGRAPHIC RELATIONS: From unknown lithostratigraphic unit. AGE: Early Silurian; here placed in Llandovery. STRATIGRAPHIC POSITION: From unknown position with section.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

• SPECIFIC LITHOLOGY: Unknown. LITHIFICATION: Lithified, on the basis of sample preparation.

Size class: macrofossils

Collected by Moskalenko

Collection methods: bulk, chemical,

• COLLECTOR: Moskalenko, unknown date. REPOSITORY: Unknown. SAMPLE PREPARATION: Rock samples were dissolved to obtain the three-dimensional microremains

Primary reference: V. Karatajute-Talimaa and M. Meredith Smith. 2004. Tesakoviaspis concentrica: microskeletal remains of a new order of vertebrate from the Upper Ordovician and Lower Silurian of Siberia. Recent Advances in the Origin and Early Radiation of Vertebrates 53-64 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 90402: authorized by Austin Hendy, entered by Austin Hendy on 19.07.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to taxon described in manuscript. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-resolution identification.
 Astraspidiformes - Tesakoviaspididae
Tesakoviaspis concentrica n. sp. Karatajute-Talimaa and Meredith Smith 2004