Isle of Portland, Portland Stone (general): Late/Upper Tithonian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Sauropoda indet.
Marsh 1878
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Delair 1993 | 1 specimen | ||||||||
| PtM centrum and rib | ||||||||||
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Ornithopsis sp.
Seeley 1870
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Delair 1993 | 2 specimens | ||||||||
| PtM tooth, BMNH tooth | ||||||||||
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Reptilia
- Crocodilia
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? Crocodilia indet.
Owen 1842
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Delair 1993 | 1 specimen | ||||||||
| spelled with current rank as Crocodylia | ||||||||||
| PtM tooth | ||||||||||
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Reptilia
- Plesiosauria
- Cryptoclididae
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Cryptocleidus aff. richardsoni
(Lydekker 1889)
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| recombined as Cryptoclidus richardsoni | ||||||||||
| "Additional fragments very probably belonging to this species" (no detailed given) | ||||||||||
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Pliosaurus portlandicus n. sp.
Owen 1869
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Owen 1869 | 1 specimen | ||||||||
| synonym of Colymbosaurus trochanterius | ||||||||||
| BMNH 40640 (holotype: partial 'juvenile' right hindlimb) | ||||||||||
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Colymbosaurus ? portlandicus
(Owen 1869)
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| synonym of Colymbosaurus trochanterius | ||||||||||
| BMNH 41216 (caudal centrum), 41217 (left scapula and coracoid) first reported by Lydekker (1889, p. 169) | ||||||||||
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Reptilia
- Plesiosauria
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Plesiosaurus megapleuron
Owen 1854
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| nomen dubium belonging to Plesiosauria | ||||||||||
| "Vertebrae and other bones...lowest beds of the Portlandian series" mentioned by Damon (1860, p. 82), but it is not clear what material he was referring to | ||||||||||
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Reptilia
- Pleurosternidae
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Pleurosternum portlandicum
Lydekker 1889
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Delair 1993 | 1 specimen | ||||||||
| synonym of Pleurosternon bullockii | ||||||||||
| BMNH skull | ||||||||||
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Reptilia
- Plesiochelyidae
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Stegochelys planiceps
(Owen 1842)
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Delair 1993 | 2 specimens | ||||||||
| recombined as Plesiochelys planiceps | ||||||||||
| OUM skull, BMNH bones | ||||||||||
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Portlandemys sp.
Gaffney 1975
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Delair 1993 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | England | County: | Dorset |
| Coordinates: | 50.6° North, 2.4° West (view map) | ||||
| Paleocoordinates: | 41.3° North, 7.6° East | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Late/Upper Jurassic |
| Stage: | Tithonian | 10 m.y. bin: | Jurassic 6 |
| Key time interval: | Late/Upper Tithonian | Ammonoid zone: | Titanites anguiformis |
| Age range of interval: | 146.30000 - 145.00000 m.y. ago |
Stratigraphy
| Geological group: | Portland | Formation: | Portland Stone | Member: | Portland Freestone |
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: Titanites giganteus (=Titanites anguiformis) Zone; likely the Portland Freestone Member based on geography | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | selective quarrying,survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | BMNH |
Metadata
| Also known as: | Portland Island | ||
| Database number: | 119505 | ||
| Authorizer: | R. Benson, M. Carrano | Enterer: | R. Benson, M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2011-10-29 03:42:23 | Last modified: | 2018-01-11 15:40:38 |
| Access level: | the public | Released: | 2011-10-29 03:42:23 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 31216. | ETE | J. B. Delair. 1960. The Mesozoic reptiles of Dorset. Part two. Proceedings of the Dorset Natural History and Archaeological Society 80:52-90 [M. Carrano/M. Carrano/R. Benson] |
Secondary references:
| 33993 | D. S. Brown. 1981. The English Upper Jurassic Plesiosauroidea (Reptilia) and a review of the phylogeny and classification of the Plesiosauria. Bulletin of the British Museum (Natural History) 35(4):253-347 [M. Carrano/H. Street/H. Street] | |
| 31457 | ETE | J. B. Delair. 1993. Reptilia from the Portland Stone (Upper Jurassic) of England: a preliminary survey of the material and the literature. Modern Geology 18:331-348 [M. Carrano/M. Carrano] |
| 41491 | R. Owen. 1869. Monographs on the British Fossil Reptilia from the Kimmeridge Clay III: contains Pliosaurus grandis, Pliosaurus trochanterius, and Pliosaurus portlandicus. Palaeontographical Society Monographs 22(98):1-12 [R. Benson/R. Benson] |