Upper Visby community, Visby Fm. (Silurian of Sweden)

Where: Sweden (57.5° N, 18.6° E: paleocoordinates 21.6° S, 2.8° W)

• coordinate based on political unit

When: Upper Visby Formation, Sheinwoodian (433.4 - 430.5 Ma)

• "lower Wenlock"

• formation-level stratigraphic resolution

Environment/lithology: marine; lime mudstone

• "fine grained carbonate mud- mainly skeletal ls. two assoc. appear to be a mixture of Clorinda and Stricklandia benthic assemblages."

Size class: macrofossils

Primary reference: J. M. Hurst. 1975. Some observations on brachs and the level-bottom community ecology of Gotland. Geol. Fo:reningens i Stockholm Fo:rhandlinger 97:250-264 [P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 476: authorized by Arnold Miller, entered by Mike Sommers on 15.12.1998, edited by Mihaela Krause

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Hurst, 1975"
Show authors, comments, and common names
unclassified
  -
Microsphaeridorhynchus sp., Rhyonellida indet.
Rhyonellida indet.
indet. rhynchonellids
Tentaculita
 Cornulitida - Cornulitidae
Conchicolites sp.
Conchicolites sp. Nicholson 1872
originally entered as "Conchiocolites sp."
Strophomenata
 Orthotetida - Chilidiopsidae
"Coolinia sp." = Fardenia (Coolinia)
"Coolinia sp." = Fardenia (Coolinia) Bancroft 1949
 Strophomenida - Sowerbyellidae
Eoplectodonta sp.
Eoplectodonta sp. Kozlowski 1929
 Strophomenida - Strophodontidae
Megastrophia sp.
Megastrophia sp. Caster 1939
 Strophomenida - Rafinesquinidae
Leptaena sp., Leptaena sperion, Leptaena rhomboidalis, "Leptaena depressa" = Leptaena (Leptaena) depressa
Leptaena sp. Dalman 1828
2 species
Leptaena sperion Bassett 1977
Leptaena rhomboidalis Wahlenberg 1818
"Leptaena depressa" = Leptaena (Leptaena) depressa Sowerby 1824
Rhynchonellata
 Spiriferida - Cyrtiidae
Cyrtia sp.
Cyrtia sp. Dalman 1828
 Atrypida - Atrypinidae
Spirigerina sp.
Spirigerina sp. d'Orbigny 1849
 Atrypida - Atrypidae
Atrypa sp.
Atrypa sp. Dalman 1828
 Protorthida - Skenidiidae
Skenidioides sp.
Skenidioides sp. Schuchert and Cooper 1931
 Rhynchonellida - Machaerariidae
Ferganella sp.
Ferganella sp. Nikiforova 1937
 Rhynchonellida - Hebetoechiidae
Sphaerirhynchia sp.
Sphaerirhynchia sp. Cooper and Muir-Wood 1951
 Orthida - Dicoelosiidae
Dicoelosia sp.
Dicoelosia sp. King 1850
 Orthida - Dalmanellidae
Visbyella sp., Isorthis sp.
Visbyella sp. Walmsley et al. 1968
Isorthis sp. Kozlowski 1929
Stenolaemata
 Trepostomata -
? Trepostomata indet.
? Trepostomata indet. Ulrich 1882
ramose bryozoans - originally entered as "? Trepostomata indet."
Cephalopoda
 Orthoceratoidea -
Orthocerida indet.
Orthocerida indet. Kuhn 1940
orthoceratid
Gastropoda
 Euomphalina - Euomphalidae
Poleumita sp.
Poleumita sp. Clarke and Ruedemann 1903 snail
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
2 species; abundances: 1 and 235
 Heliolitida - Halysitidae
Halysites sp.
Halysites sp. von Waldheim 1813 tabulate coral