Podolian Silurian eurypterids (Silurian of Ukraine)

Where: Khmelnitsky, Ukraine (48.6° N, 26.7° E: paleocoordinates 21.2° S, 7.5° E)

When: Ustye Formation (Yaruga Group), Ludlow (427.4 - 423.0 Ma)

• The stratigraphically studied locality belongs to the Ustye Formation, Bagovytsa Regional Stage “Horizon”, part of the Yaruga Group (Ludlow Stage, Upper Silurian; Selden and Drygant, 1987).

Environment/lithology: lagoonal or restricted shallow subtidal; lithified marl

• Occasionally there are levels with desiccation cracks, suggesting temporary drying

•up of some parts of the lagoonal bottom.

• platy marl

Size class: macrofossils

Collection methods: Materials published in this paper were collected by Serge Naugolnykh in May 1991, during a field trip prior to a session of the Ukrainian Paleontological

•Society.

Primary reference: S. V. Naugolnykh and E. S. Shpinev. 2018. Pterygotid Eurypterids from the Upper Silurian of Podolia (Ukraine). Paleontological Journal 52(13):1545-1552 [R. Plotnick/R. Plotnick]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 225270: authorized by Roy Plotnick, entered by Roy Plotnick on 01.05.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

• eurypterids identified as Eurypterus tetragonophthamusFischer (=Baltoeurypterus tetragonophthamus, E. fischeri Eichwald). Rarely, the same beds containcarapaces of the synziphosurine Pasternakevia podolica Selden et Drygant (Selden and Drygant, 1987; Krzemiński et al., 2010), thalli of macrophytic benthicalgae, and fragments of pterygotid carapaces
Show authors, comments, and common names
Euchelicerata
 Eurypterida - Pterygotidae
Pterygotus sp.
Pterygotus sp. Agassiz 1839 eurypterid
 Eurypterida - Eurypteridae
Eurypterus tetragonophthamus
 Synziphosurina - Bunodidae
Pasternakevia podolica
Pasternakevia podolica Selden and Drygant 1987