Galgberget 1, Visby, Gotland, Tofta reef (Silurian of Sweden)

Also known as Reef 3672

Where: Sweden (57.7° N, 18.3° E: paleocoordinates 21.6° S, 3.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• Tofta Formation is also known as Kopparsvik Formation

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified wackestone and lithified lime mudstone

• 3.4 m of stromatoporoid-algal reef-like community with a low diversity in an intertidal environment

Size class: macrofossils

Collection methods: peel or thin section,

Primary reference: R. Watkins. 1992. Paleoecology of a low-diversity Silurian community from the Tofta Beds of Gotland. Palaeontologische Zeitschrift 66:405-413 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 77535: authorized by Wolfgang Kiessling, entered by Uta Merkel on 15.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
 Cystiphyllida - Tryplasmatidae
Tryplasmatidae indet. Etheridge 1907 horn coral
Stromatoporoidea
 Clathrodictyida - Actinodictyidae
Actinodictyon tenue stromatoporoid sponge
 Clathrodictyida - Clathrodictyidae
Clathrodictyon kudriavzevi Riabinin 1951 stromatoporoid sponge
Gastropoda
 Murchisoniina - Hormotomidae
Hormotoma sp. Salter 1859 snail
 Euomphalina - Euomphalidae
Poleumita discors Sowerby 1814 snail
 Euomphalina -
Platyceratoidea indet. Hall 1859 snail
Rhynchonellata
 Atrypida - Septatrypidae
Stenolaemata
 Trepostomata -
Trepostomata indet. Ulrich 1882
Trilobita
  -
Trilobita indet. Walch 1771 trilobite
Ostracoda
 Leperditicopida - Leperditiidae
unclassified
  -
Cyanobacteria indet. Stanier 1973
"fenestral non-skeletal oncolites" of Riding 1979
Cyanophyceae
  - Garwoodiaceae
Hedstroemia sp. Rothpletz 1913