Eurypterid-Associated Biota of the Rootsikula Horizon, Saaremaa, Estonia: Rootsikula, Estonia

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
informal Stromatolites indet.
Xiphosura - Xiphosurida
Truncatiramus osiliensis
Dolichopterus stormeri Caster and Kjellesvig-Waering 1956
synonym of Strobilopterus laticeps
Mixopterus simonsi
Erieopterus laticeps
Erettopterus laticauda
Xiphosura - Xiphosurida - Adelophthalmidae
Nanahughmilleria patteni
original and current combination Hughmilleria (Nanahughmilleria)
Xiphosura - Xiphosurida - Carcinosomatidae
Carcinosoma sp.
Xiphosura - Xiphosurida - Eurypteridae
Baltoeurypterus tetragonophthalmus (Fischer 1839)
original and current combination Eurypterus tetragonophthalmus
Xiphosura - Xiphosurida - Pterygotidae
Pterygotus impactus
Cephalaspidomorphi - Cephalaspidiformes
Cephalaspidoformes indet.
Thelodontiformes indet. Kiaer 1932
see common names

Coordinates: 58.4° North, 22.5° East (view map)
Paleocoordinates:15.2° South, 1.1° West
Basis of coordinate:based on political unit
Geographic resolution:local area
Period:Silurian Epoch:Wenlock
Stage:Homerian 10 m.y. bin:Silurian 2
*Local age/stage:Rootsikula
Key time interval:Rootsikula
Age range of interval:426.20000 - 422.90000 m.y. ago
* legacy (obsolete) database fields
Stratigraphic resolution:formation
Stratigraphy comments: 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".
Lithology and environment
Primary lithology:desiccation cracks,burrows "limestone"
Secondary lithology:desiccation cracks,burrows dolomite
Lithology description: "Limestone and dolomite with mudcracks, discontinuity surfaces, ripple marks and worm tracks."
Environment:marine indet.
Geology comments: "Kaljo (1970, 1972) considers this to be a nearshore, quiet water (lagoonal) community. BA 1."
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Database number:26922
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-11-08 09:46:16 Last modified:2006-09-13 14:01:03
Access level:the public Released:2002-11-08 09:46:16
Creative Commons license:CC BY
Reference information

Primary reference:

4261. 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]