Upper Visby Beds Brachiopods (Silurian of Sweden)
Where: Gotland, Sweden (57.6° N, 18.3° E: paleocoordinates 21.6° S, 3.0° W)
• coordinate based on political unit
• local area-level geographic resolution
When: Upper Visby Formation, Sheinwoodian (433.4 - 430.5 Ma)
• Correlation from Jeppsson (1983), Fossils and Strata 15:128.
• group of beds-level stratigraphic resolution
Environment/lithology: deep subtidal ramp; packstone and lime mudstone
• 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; "This series of micritic limestones and marls (of the Lower Visby) shows upward increasing intercalations of biodetritic limestones (packstones, in the upper part grainstones) which indicate episodes of wave-base influence on the sea floor...erosional discordances and channel structures indicate the effects of bottom currents."
• see geology
Size class: macrofossils
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 13524: authorized by Michael Foote, entered by Michael Foote on 12.04.2002, edited by Uta Merkel and Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Strophomenata | |
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Streptis grayii Davidson 1848
Plectotreta lindstroemi Ulrich and Cooper 1936 | |
|
Coolinia pecten Linnaeus 1758
Valdaria testudo Bassett and Cocks 1974 | |
|
Eoplectodonta duvalii Davidson 1847 | |
"Leangella segmentum" = Leangella (Leangella) segmentum
"Leangella segmentum" = Leangella (Leangella) segmentum Lindstrom 1861 | |
Pentlandina lewisii2, Pentlandina loveni, "Bellimurina wisgoriensis" = Cyphomenoidea wisgoriensis2, Katastrophomena (Katastrophomena) penkillensis2, aff. Katastrophomena aff. scabrosa
Pentlandina loveni Verneuil 1848
"Bellimurina wisgoriensis" = Cyphomenoidea wisgoriensis2 Lamont and Gilbert 1945
aff. Katastrophomena aff. scabrosa Davidson 1847 | |
"Leptaena rugata" = Leptaenoidea rugata
"Leptaena rugata" = Leptaenoidea rugata Lindström 1861 | |
Brachyprion sp., "Leptostrophia filosa" = Mesoleptostrophia filosa, "Megastrophia (Protomegastrophia) semiglobosa" = Protomegastrophia semiglobosa
Brachyprion sp. Shaler 1865
"Leptostrophia filosa" = Mesoleptostrophia filosa Sowerby 1839
"Megastrophia (Protomegastrophia) semiglobosa" = Protomegastrophia semiglobosa Davidson 1871 | |
Leptaena rhomboidalis, "Leptaena depressa" = Leptaena (Leptaena) depressa, "Leptaena depressa" = Leptaena (Leptaena) depressa1
Leptaena rhomboidalis Wahlenberg 1818
"Leptaena depressa" = Leptaena (Leptaena) depressa Sowerby 1824
"Leptaena depressa" = Leptaena (Leptaena) depressa1 Sowerby 1824 | |
| Chileata | |
|
Dictyonella capewellii Davidson 1848 | |
| Rhynchonellata | |
|
Clorinda rotunda Lindström 1861 | |
|
Howellella elegans Muir-Wood 1925 | |
"Cyrtia exporrecta" = Cyrtia exporrectus, Eospirifer radiatus
"Cyrtia exporrecta" = Cyrtia exporrectus Wahlenberg 1818
Eospirifer radiatus Sowerby 1834 | |
Atrypa reticularis, Atrypa hedei, Spinatrypina tubulosa, Plectatrypa lamellosa, Plectatrypa imbricata
Atrypa reticularis Linnaeus 1758
Atrypa hedei Struve 1966
Spinatrypina tubulosa Bassett and Cocks 1974
Plectatrypa lamellosa Lindström 1861
Plectatrypa imbricata Sowerby and Murchison 1839 | |
"? Rhynchonella ? exigua" = Zygatrypa exigua
"? Rhynchonella ? exigua" = Zygatrypa exigua Lindström 1861 questionable occurrence of "Rhynchonella" exigua, which may be a n. gen.
| |
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Skenidioides acutum Lindström 1861 | |
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? Microsphaeridiorhynchus nucula Sowerby 1839
Rhynchotreta cuneata Dalman 1828 | |
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Ferganella borealis Buch 1834 | |
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Sphaerirhynchia spp. Cooper and Muir-Wood 1951 | |
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Dicoelosia verneuiliana Beecher 1891 | |
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Dalejina phaseola Rubel 1963 | |