Eurypterid-Associated Biota of the Rootsikula Horizon, Saaremaa, Estonia (Silurian of Estonia)

Where: Estonia (58.4° N, 22.5° E: paleocoordinates 15.2° S, 1.1° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Rootsikula Formation, Rootsikula (426.2 - 422.9 Ma)

• Rootsikula Horizon. Plotnick gives international age as Ludlovian (evidently following Kaljo 1970, PBDB ref. 7443), but more recent work (e.g. Kaljo and Klaamann, 1982, PBDB ref. 7448) correlates Rootsikula with later Wenlock, and also refers to "Rootsikula Formation" as well as "Rootsikula Horizon".

• formation-level stratigraphic resolution

Environment/lithology: marine; burrowed limestone and burrowed dolomite

• "Kaljo (1970, 1972) considers this to be a nearshore, quiet water (lagoonal) community. BA 1."
• "Limestone and dolomite with mudcracks, discontinuity surfaces, ripple marks and worm tracks."

Primary reference: R. E. Plotnick. 1999. Habitat of Llandoverian-Lochkovian eurypterids. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities - a case study from the Silurian and Lower Devonian 106-136 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26922: authorized by Michael Foote, entered by Michael Foote on 08.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Petromyzontida
 Cephalaspidiformes -
"Cephalaspidoformes indet." = Cephalaspidiformes
"Cephalaspidoformes indet." = Cephalaspidiformes
osteostracans
Thelodonti
 Thelodontiformes -
Euchelicerata
 Eurypterida - Pterygotidae
Pterygotus impactus, "Erettopterus laticauda" = Erettopterus, "Truncatiramus osiliensis" = Erettopterus
"Erettopterus laticauda" = Erettopterus eurypterid
"Truncatiramus osiliensis" = Erettopterus eurypterid
 Eurypterida - Adelophthalmidae
 Eurypterida - Mixopteridae
 Eurypterida - Carcinosomatidae
Carcinosoma sp. Claypole 1890 eurypterid
 Eurypterida - Erieopteridae
 Eurypterida - Eurypteridae
"Baltoeurypterus tetragonophthalmus" = Eurypterus tetragonophthalmus
"Baltoeurypterus tetragonophthalmus" = Eurypterus tetragonophthalmus Fischer 1839 eurypterid
 Eurypterida - Strobilopteridae
"Dolichopterus stormeri" = Strobilopterus laticeps
"Dolichopterus stormeri" = Strobilopterus laticeps Schmidt 1883 eurypterid