Imaigda River, Taymyr Peninsula (Devonian of Russian Federation)

Also known as Merostomata, Lower Devonian, Imaigda river

Where: Siberia, Russian Federation (76.0° N, 104.0° E: paleocoordinates 18.1° N, 9.2° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Zub Formation, Lochkovian (419.2 - 410.8 Ma)

• Krylova et al. (1967) note that this is the Zubova "suite." Upper third of the Zub


• formation-level stratigraphic resolution

Environment/lithology: paralic; lithified, dolomitic, gypsiferous, gray marl

• "Examination of the core samples showed thin, even laminations, indicative of a

•potentially dysaerobic environment below the fair weather wave base."

• "

Size class: macrofossils

• palynomorhs, plant debris, bivalves, ostracodes, fish debris

Primary reference: N.I. Novojilov. 1958. Mérostomates du dévonien inférieur et moyen de Sibérie. Annales de la Société Géologique du Nord 78:243-257 [L. Villier/L. Villier]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60391: authorized by Loic Villier, entered by Loic Villier on 12.05.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

 Eurypterida - Stylonuridae
Stylonuridae indet. Diener 1924 eurypterid
 Eurypterida - Mycteropidae
? Mycteropidae indet. Cope 1886 eurypterid
 Eurypterida - Pterygotidae
Pterygotus sp. Agassiz 1839 eurypterid
 Chasmataspidida - Diploaspididae
Heteroaspis stoermeri Novojilov 1959
Dvulikiaspis menneri Novojilov 1958
 Xiphosura -
 Euchelicerata -
Borchgrevinkium taimyrensis n. gen. n. sp. Novojilov 1959