Visby Area, various beds from coast from "A" beds: Telychian, Sweden

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Pentamerida - Clorindidae
Clorinda rotunda (Lindström 1861)
Bassett and Cocks 1974
Paragastropoda - Mimospirida - Onychochilidae
Oriostoma contrarium Lindström 1884
Polyplacophora
Thairoplax birhombivalvis (Bergenhayn 1955)
Cherns 1998 4 specimens
Gastropoda - Murchisoniina - Luciellidae
Pleurotomaria limata Lindström 1884
Knight 1945
Gastropoda - Murchisoniina - Gosseletinidae
Pleurotomaria biformis Lindström 1884
Pleurotomaria aequilatera (Wahlenberg 1821)
Gastropoda - Murchisoniina - Phanerotrematidae
Pleurotomaria labrosa Hall 1859
    = Pseudoscalites lindstroemi Boucot et al. 1967
Boucot et al. 1967
Gastropoda - Murchisoniina - Subulitidae
Subulites attenuatus Lindström 1884
Gastropoda - Murchisoniina - Loxonematidae
Holopella regularis Lindström 1884
Gastropoda - Bellerophontida - Bellerophontidae
Bellerophon gemma Lindström 1884
Bellerophon latevittatus Lindström 1884
Bellerophon sphaera Lindström 1884
Peel and Wängberg-Eriksson 1979
Gastropoda - Bellerophontida - Plectonotidae
Bellerophon trilobatus de Sowerby and Murchison 1839
    = Plectonotus boucoti Peel 1974
Peel 1974
Gastropoda - Bellerophontida - Bucaniidae
Tremanotus longitudinalis Lindström 1884
Salpingostoma martinssoni Peel 1991
Peel 1991
Gastropoda - Euomphalina - Oriostomatidae
Oriostoma roemeri Lindström 1884
Oriostoma globosum (von Schlotheim 1820)
Oriostoma helicinum Lindström 1884
Gastropoda - Euomphalina - Euomphalidae
Pleurotomaria frenata Lindström 1884
Pleurotomaria togata Lindström 1884
Pleurotomaria alata (Wahlenberg 1821)
Pleurotomaria praetexta Lindström 1884
Pleurotomaria undulans Lindström 1884
see common names

Geography
Country:Sweden State/province:Gotland
Coordinates: 57.5° North, 18.6° East (view map)
Paleocoordinates:24.1° South, 3.1° West
Basis of coordinate:based on political unit
Geographic resolution:local area
Time
Period: Silurian Epoch: Llandovery
Stage: Telychian 10 m.y. bin: Silurian 1
*Period:Early/Lower Silurian *Epoch:Late/Upper Llandovery
*International age/stage:Late/Upper Telychian - Late/Upper Telychian
Key time interval: Telychian Conodont zone:  Pterospathodus amorphognathoides
Age range of interval: 438.5 - 433.4 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Lower Visby Member:A
Stratigraphic resolution:member
Stratigraphy comments: Based on Laufeld (1974) Sveriges Geologiska Undersokning Ser C 705:1 - 172 and Jeppson et al. (1994) Geological Magazine 131: 201 - 218; Manten, A. A. 1971. Silurian reefs of Gotland. Elsevier, Amsterdam.
Lithology and environment
Primary lithology:gray,blue poorly lithified marl
Secondary lithology: "limestone"
Lithology description: "soft marlstone of bluish grey colour alternating with harder marly limestone."
Environment:reef, buildup or bioherm
Geology comments: 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."
Taphonomy
Modes of preservation:body,replaced with silica
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:bulk,field collection,survey of museum collection
Reason for describing collection:taxonomic analysis
Collection method comments: Visby A denotes several localities around Visby: "The two lower units are fairly uniform, both lithologically and faunally, along hte whole outcrop belt." (Jaanusson 1986).
Updated by Wagner (1992 pers. obs. while at the Riksmuseet, Stockholm) - includes types and subsequent stratigraphic collections.
Taxonomic list comments:Genera updated by Wagner
Metadata
Database number:3972
Authorizer:P. Wagner, B. Kröger Enterer:P. Wagner, B. Kröger
Modifier:P. Wagner Research group:marine invertebrate
Collections that are a subset of this one:13638
Created:1999-08-12 16:10:00 Last modified:2018-05-14 23:41:54
Access level:the public Released:1999-08-12 16:10:00
Creative Commons license:CC BY
Reference information

Primary reference:
275. G. Lindström. 1884. The Silurian Gastropoda and Pteropoda of Gotland. Kongliga Svenska Vetenskaps-Akademiens Handlingasr 19:1-250 [P. Wagner/P. Wagner/P. Wagner]

Secondary references:

6126 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]
15770 A. J. Boucot, J. G. Johnson, C. Harper and V. G. Walmsley. 1967. Silurian brachiopods and gastropods of southern New Brunswick. Geological Survey of Canada Bulletin 140(1):1-45 [P. Wagner/P. Wagner/O. Alfaro]
16959 L. Cherns. 1998. Silurian polyplacophoran molluscs from Gotland, Sweden. Palaeontology 41(5):23-31 [P. Wagner/P. Wagner]
15540 V. Jaanusson. 1986. Locality designations in old collections from the Silurian of Gotland 1-19 [P. Wagner/P. Wagner/P. Wagner]
15527 J. B. Knight. 1945. Some new genera of Paleozoic Gastropoda. Journal of Paleontology 19(6):573-587 [P. Wagner/P. Wagner]
6138 L. Liljedahl. 1994. Silurian nuculoid and modiomorphid bivalves from Sweden. Fossils and Strata (33)1-89 [M. Foote/M. Foote/P. Wagner]
15195 J. S. Peel. 1974. Systematics, ontogeny and functional morphology of Silurian trilobed bellerophontacean gastropods. Bulletin of the Geological Society of Denmark 23:231-264 [P. Wagner/P. Wagner/P. Wagner]
16254 J. S. Peel. 1991. Salpingostomatiform and related bellerophontacean gastropods from Greenland and the Baltic region. Grønlands Geologiske Undersøgelse Bulletin 161:67-116 [P. Wagner/P. Wagner]
16237 J. S. Peel and K. Wängberg-Eriksson. 1979. Monoplacophorans. Sveriges Geologiska Undersökning Serie C 762(73):104-104 [P. Wagner/P. Wagner]
9042 P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]