Genus: Tesakoviaspis KARATAJUTE-TALIMAA, 1978
Etymology: In honor of Dr. Yurji Ivanovich Tesakov (Novosibirsk), hwo was the first to collect samples in the valley of the N. Tchunku River.

Species: concentrica KARATAJUTE-TALIMAA, 1978
Etymolgy: Latin, concentrica, in reference to the concentrically arranged tubercles.

Holotype: Institute of Geology and Geography, Vilnius, Nr. 10-054.

Locality: Chunku River, Irkutsk Amphitheater, Podkamennaya, Siberia, Asian Russia.

Horizon: Upper Balturino Subformation.

Biostratigraphy:

Age: Upper Llandovery, Khastyrian Regional Stage, Early Silurian.

Material: Poylgonal tessera.

Partypes: Nr. 10: About 210 specimens.