Lower Visby Beds Brachiopods (Silurian to of Sweden)

Where: Gotland, Sweden (57.6° N, 18.3° E: paleocoordinates 23.5° S, 3.2° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Lower Visby Beds Formation, Telychian to Telychian (438.5 - 430.5 Ma)

• Correlation based on Jeppsson (1983), Fossils and Strata 15:128.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore ramp; lime mudstone and marl

• 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; "The Lower Visby Beds consist of micritic limestones and marls, without transported and sorted detrital material, accumulated well below the wave base and photic zone; only weak water movements touched the bottom."
• see geology comments

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 13523: authorized by Michael Foote, entered by Michael Foote on 12.04.2002, edited by Uta Merkel, Wolfgang Kiessling and Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Orthida - Dicoelosiidae
 Orthida - Rhipidomellidae
Dalejina phaseola Rubel 1963
 Orthida - Dalmanellidae
Visbyella visbyensis Lindstrom 1861
Isorthis loveni Lindström 1861
 Orthida - Hesperorthidae
Hesperorthis davidsoni de Verneuil 1845
 Pentamerida - Clorindidae
Clorinda rotunda Lindström 1861
 Pentamerida - Stricklandiidae
Costistricklandia lirata Sowerby 1839
Costistricklandia lirata lirata
 Pentamerida - Camerellidae
? Camerella sp. Billings 1859
 Rhynchonellida - Hebetoechiidae
Sphaerirhynchia sp. Cooper and Muir-Wood 1951
 Spiriferida - Cyrtiidae
Eospirifer marklini, "Cyrtia exporrecta" = Cyrtia exporrectus
Eospirifer marklini deVerneuil 1848
"Cyrtia exporrecta" = Cyrtia exporrectus Wahlenberg 1818
 Spiriferida - Delthyrididae
Howellella elegans Muir-Wood 1925
 Atrypida - Anazygidae
"Rhynchonella exigua" = Zygatrypa exigua
"Rhynchonella exigua" = Zygatrypa exigua Lindström 1861
"Rhynchonella" exigua; possibly a n.gen.
 Atrypida - Atrypidae
Desquamatia sp. Alekseeva 1960
Atrypa reticularis Linnaeus 1758
Plectatrypa imbricata Sowerby and Murchison 1839
? Plectatrypa ? lamellosa Lindström 1861
 Atrypida - Lissatrypidae
"Glassia obovata" = Lissatrypa obovata
"Glassia obovata" = Lissatrypa obovata Sowerby 1839
Strophomenata
 Orthotetida - Chilidiopsidae
Coolinia pecten Linnaeus 1758
 Strophomenida - Leptestiidae
"Leangella segmentum" = Leangella (Leangella) segmentum
"Leangella segmentum" = Leangella (Leangella) segmentum Lindstrom 1861
 Strophomenida - Sowerbyellidae
"Eoplectodonta transversalis" = Eoplectodonta (Eoplectodonta) transversalis
"Eoplectodonta transversalis" = Eoplectodonta (Eoplectodonta) transversalis Wahlenberg 1818
 Strophomenida - Leptostrophiidae
"Megastrophia (Protomegastrophia) walmstedti" = Brachyprion (Erinostrophia) walmstedti
"Megastrophia (Protomegastrophia) walmstedti" = Brachyprion (Erinostrophia) walmstedti Lindström 1861
 Strophomenida - Rafinesquinidae
"Leptaena depressa" = Leptaena (Leptaena) depressa1
"Leptaena depressa" = Leptaena (Leptaena) depressa1 Sowerby 1824
 Strophomenida - Furcitellidae
Pentlandina sp. Bancroft 1949
Pentlandina tartana2 Bancroft 1949
Cyphomenoidea wisgoriensis Lamont and Gilbert 1945
 Strophomenida - Leptaenoideidae
Liljevallia gotlandica Hedstrom 1917
Chileata
 Chileida - Trifissuridae
Trifissura rigida3 Holmer et al. 2014