'Alum Shale' (Harpoceras falciferum), Whitby-Saltwick section, Yorkshire: Falciferum, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Plesiosauria
- Pliosauridae
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Plesiosaurus longirostris n. sp.
Tate and Blake 1876
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1 individual | |||||||||
| MCZ 1033 (holotype skull), and likely associated postcranial skeleton in Texas | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | England | County: | Yorkshire |
| Coordinates: | 54.5° North, 0.6° West (view map) | ||||
| Paleocoordinates: | 42.9° North, 16.6° East (Wright 2013) | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Early Jurassic |
| Stage: | Toarcian | 10 m.y. bin: | Jurassic 3 |
| Key time interval: | Falciferum | Ammonoid zone: | Harpoceras falciferum |
| Age range of interval: | 184.2 - 182 m.y. ago |
Stratigraphy
| Geological group: | Lias | Formation: | Whitby Mudstone | Member: | Jet Rock Beds |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "Upper Lias, Zone of Ammonites serpentinus Reincke, Whitby, Yorkshire, England. According to William E. Schevill Ammonites serpentinus Reincke-Hildoceratoides serpentinus (Reincke) after S. S. Buckman. This zone would then be the Hildoceratan zone of Evans and Stubblefield, which is middle Whitbian. The specimen probably came from near the bottom of the Alum shale."
Benton & Taylor (1984) provided up-to-date provenance data | |||||
Lithology and environment
| Primary lithology: | planar lamination,concretionary,pyritic,brown,gray carbonaceous "shale" |
| Includes fossils? | Y |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Abundance in sediment: | rare |
| Fragmentation: | frequent |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection size: | 1 individuals |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 102189 | ||
| Authorizer: | M. Carrano | Enterer: | H. Street |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2011-01-11 08:18:51 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2011-01-11 08:18:51 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 38373. | R. Tate and J. F. Blake. 1876. The Yorkshire Lias 1-475 [R. Benson/R. Benson/M. Clapham] |
Secondary references:
| 30422 | M. J. Benton and M. A. Taylor. 1984. Marine reptiles from the Upper Lias (Lower Toarcian, Lower Jurassic) of the Yorkshire coast. Proceedings of the Yorkshire Geological Society 44(4):399-429 [W. Kiessling/U. Merkel] | |
| 34724 | T. E. White. 1940. Holotype of Plesiosaurus longirostris Blake and classification of the plesiosaurs. Journal of Paleontology 14(5):451-467 [M. Carrano/H. Street] |