Tofta Beds Brachiopods (Silurian of Sweden)

Where: Gotland, Sweden (57.5° N, 18.4° E: paleocoordinates 21.6° S, 2.9° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Tofta Beds Formation, Sheinwoodian (433.4 - 430.5 Ma)

• Correlation from Jeppsson (1983), Fossils and Strata 15:128

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; oncoidal limestone and reef rocks

• SEP: Silurian of Gotland has been variably described as a ramp and platform. Based on my read of the literature, I think if falls best into the ramp category. From Samtleben et al. (1996). Geol. Rundsch 85:278-292; "Predominant in this unit are oncolitic limestones and biostromal carbonate buildups which were formed by algae and a few stromatopore species. A monotonous benthic association comprised only of a few species indicates restricted marine, somewhat lagoonal conditions. Mud cracks are evidence of episodic emersion and desiccation."

Primary reference: M. G. Bassett and L. R. M. Cocks. 1974. A review of Silurian brachiopods from Gotland. Fossils and Strata (3)1-56 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13526: authorized by Michael Foote, entered by Michael Foote on 12.04.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Pentamerida - Parastrophinidae
Anastrophia deflexa
Anastrophia deflexa Sowerby 1839
 Spiriferida - Cyrtiidae
"Cyrtia exporrecta" = Cyrtia exporrectus
"Cyrtia exporrecta" = Cyrtia exporrectus Wahlenberg 1818
 Atrypida - Atrypidae
Atrypa reticularis, ? Spinatrypa ? sp.
Atrypa reticularis Linnaeus 1758
? Spinatrypa ? sp. Stainbrook 1951