Genus
Valid Extinct

Thalassiodracon

Storrs and Taylor 1996

Thalassiodracon (tha-LAS-ee-o-DRAY-kon) is an extinct genus of plesiosauroid from the Pliosauridae that was alive during the Late Triassic-Early Jurassic (Rhaetian-Hettangian) and is known exclusively from the Lower Lias of England. The type and only species, is Thalassiodracon (Plesiosaurus) hawkinsii.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
8
Group
Sauroptérygiens
Carnivore nektonic Marine
Thalassiodracon
click to enlarge
Thalassiodracon NHM © the paleobear · CC BY 2.0 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Sauropterygia Suborder
›
Plesiosauria Order
›
Pliosauroidea Superfamily
›
Pliosauridae Family
›
Thalassiodracon Genus
Fossil sites 8 geolocated sites
Distribution
Top countries
🇬🇧 United Kingdom
8
Geological formations
Blue Lias
4
White Lias
3
Temporal distribution
Pliensbachian (192.9–184.2 Ma)
1
Hettangian (201.4–199.5 Ma)
7
Species (7)
Plesiosaurus eleutheraxon subjective synonym of Thalassiodracon hawkinsii 201 Ma
Plesiosaurus etheridgei subjective synonym of Thalassiodracon hawkinsii 201 Ma
Plesiosaurus etheridgii subjective synonym of Thalassiodracon hawkinsii 201 Ma
Plesiosaurus hexatarsostinus nomen oblitum, species not entered Thalassiodracon
Plesiosaurus pentetarsostinus nomen oblitum, species not entered Thalassiodracon
Plesiosaurus triatarsostinus nomen oblitum, species not entered Thalassiodracon
Thalassiodracon hawkinsii 201 Ma
Synonyms (3)
Plesiosaurus hexatarsostinus nomen oblitum, species not entered Thalassiodracon
Plesiosaurus pentetarsostinus nomen oblitum, species not entered Thalassiodracon
Plesiosaurus triatarsostinus nomen oblitum, species not entered Thalassiodracon
Images 1
Bibliography
Original description
F. R. O'Keefe. 2001. A cladistic analysis and taxonomic revision of the Plesiosauria (Reptilia: Sauropterygia). Acta Zoologica Fennica 213:1-63
Bibliography (6)
J. B. Delair. 1960. The Mesozoic reptiles of Dorset. Part two. Proceedings of the Dorset Natural History and Archaeological Society 80:52-90
R. Lydekker. 1888. Catalogue of the Fossil Reptilia and Amphibia in the British Museum (Natural History). Part I. Containing the Orders Ornithosauria, Crocodilia, Dinosauria, Squamata, Rhynchocephalia, and Proterosauria. British Museum (Natural History), London DOI ↗
H. G. Seeley. 1865. On two new plesiosaurs, from the Lias. Annals and Magazine of Natural History, series 3 16:352-359 DOI ↗
T. Wright. 1860. On the Zone of Avicula contorta, and the Lower Lias of the South of England. Quarterly Journal of the Geological Society 16:374-411 DOI ↗
T. H. Huxley. 1858. On a new species of Plesiosaurus from Street, near Glastonbury; with remarks on the structure of the atlas and axis vertebrae, and of the cranium, in that genus. Quarterly Journal of the Geological Society of London 14:281-294 DOI ↗
R. Owen. 1840. Report on British fossil reptiles. Report of the British Association for the Advancement of Science 8:43-126