Where: England, United Kingdom (54.5° N, 0.6° W: paleocoordinates 42.4° N, 9.3° E)
• coordinate estimated from map
When: Hildoceras bifrons ammonoid zone, Main Alum Shales Member (Alum Shale Formation), Bifrons (182.0 - 175.6 Ma)
Environment/lithology: marine; concretionary, gray shale and sideritic mudstone
Size class: macrofossils
Collected in the 1800s
Collection methods: quarrying, surface (in situ)
Primary reference: R. Owen. 1865. Part I. Sauropterygia. Monographs on the fossil Reptilia of the Liassic formations 17(75):1-40 [R. Benson/R. Benson/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 118471: authorized by Roger Benson, entered by Roger Benson on 14.10.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
| Reptilia | |
Sthenarosaurus dawkinsi n. gen. n. sp.
Sthenarosaurus dawkinsi n. gen. n. sp. Watson 1909 plesiosaur MMUM LL 8023 (holotype postcranial skeleton)
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"Plesiosaurus homalospondylus n. sp." = Microcleidus homalospondylus
"Plesiosaurus homalospondylus n. sp." = Microcleidus homalospondylus Owen 1865 plesiosaur BMNH 36154 (holotype skeleton) and YORYM 502 (referred skeleton; "lias cliffs south of Whitby, by Mr Brown Marshall, and liberally presented by Col. Cholmley" to York Museum in 1853); Watson (1909) later reported MMUM LL 7077 (partial skeleton, collected by W. G. Sutcliffe, Esq., F.G.S, from Whitby)
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