Hamra Beds Brachiopods: Ludfordian, Sweden
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Strophomenata
- Strophomenida
- Strophochonetidae
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Protochonetes striatellus
(Dalman 1828)
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Lepidoleptaena sp.
Havlicek 1963
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Rhynchonellata
- Pentamerida
- Parastrophinidae
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Anastrophia deflexa
(Sowerby 1839)
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Rhynchonellata
- Spiriferida
- Cyrtinopsidae
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Boucotinskia sulcata
(Hisinger 1837)
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Rhynchonellata
- Spiriferida
- Delthyrididae
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? Delthyris ? elevata
Dalman 1828
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Howellella elegans
Muir-Wood 1925
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Rhynchonellata
- Spiriferida
- Cyrtiidae
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? Striispirifer ? striolatus
(Lindström 1861)
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Rhynchonellata
- Athyridida
- Meristellidae
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Whitfieldella sp.
Hall and Clarke 1893
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Rhynchonellata
- Athyridida
- Rhynchospirinidae
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Homoeospira baylei
(Davidson 1848)
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Rhynchonellata
- Athyridida
- Anoplothecidae
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Coelospira pusilla
(Hisinger 1837)
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Rhynchonellata
- Atrypida
- Atrypinidae
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Atrypina barrandii
(Davidson 1848)
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Spirigerina quinquecostata
Munthe 1910
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Rhynchonellata
- Atrypida
- Atrypidae
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Atrypa reticularis
(Linnaeus 1758)
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| original and current combination Anomia reticularis | |||||||
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Spinatrypa sp.
Stainbrook 1951
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Desquamatia sp.
Alekseeva 1960
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Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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? Microsphaeridiorhynchus nucula
(Sowerby 1839)
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Rhynchonellata
- Orthida
- Dalmanellidae
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Isorthis canaliculata
(Lindström 1861)
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| recombined as Levenea canaliculata | |||||||
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Rhynchonellata
- Orthida
- Hesperorthidae
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Ptychopleurella bouchardi
(Davidson 1847)
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| see common names | |||||||
Geography
| Country: | Sweden | State/province: | Gotland |
| Coordinates: | 57.5° North, 18.4° East (view map) | ||
| Paleocoordinates: | 16.5° South, 2.4° West | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | local area |
Time
| Period: | Silurian | Epoch: | Ludlow |
| Stage: | Ludfordian | 10 m.y. bin: | Silurian 2 |
| Key time interval: | Ludfordian | ||
| Age range of interval: | 425.60000 - 423.00000 m.y. ago |
Stratigraphy
| Formation: | Hamra Beds | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Correlation from Jeppsson (1983), Fossils and Strata 15:128 | |||||
Lithology and environment
| Primary lithology: | "limestone" | ||
| Environment: | open shallow subtidal | Tectonic setting: | cratonic basin |
| Geology comments: SEP: this sample almost certainly from interbiohermal limestones in oncolitic limestone facies in Hamra | |||
Taphonomy
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 13534 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-04-12 10:01:33 | Last modified: | 2006-09-15 15:15:11 |
| Access level: | the public | Released: | 2002-04-12 10:01:33 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 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] |