
Skull of the ichthyosaur Temnodontosaurus platydon, the first ever discovered. Mary Anning's brother Joseph found the skull in 1810 and Mary found parts of the neck a year later.
Our collection contains many marine reptile specimens from the Lower Lias of the Dorset coast, including some discovered by Mary Anning.
The marine reptiles collection will be closed to scientific visitors from 1st September 2021 until further notice as there is currently no curator to cover this section. We apologise for the inconvenience and hope that to welcome visitors again as soon as possible. Please continue to check this website for updates regarding re-opening.
Collection strengths
The collection’s highlights are on display in the Museum’s Fossil Marine Reptile gallery, including:
- the first ichthyosaur skull, now called Temnodontosaurus platyodon, discovered in 1810
- the first articulated plesiosaur, Plesiosaurus dolichodeirus, discovered in 1823
Large collections of Callovian (Middle Jurassic) marine reptiles from Cambridgeshire brick pits were purchased from Alfred Leeds in 1890 and 1914. These include many type and figured skeletons of plesiosaurs, ichthyosaurs and marine crocodiles, including:
- the plesiosaur Cryptocleidus eurymerus
- the ichthyosaur Ophthalmosaurus icenicus
Looking for a specimen?
The marine reptile collection is being digitised.
Any questions ?
If you would like to use any specimens for research
Major collections
The collection also contains other important marine reptile fossils from the Lower Lias of Dorset, in the UK, including those of Thomas Hawkins and the Earl of Enniskillen, who both purchased specimens from Mary Anning.
We have a small number of isolated bones and teeth of both ichthyosaurs and plesiosaurs from a range of Late Jurassic and Cretaceous sites in Britain.
Our collection also includes a unique plesiosaur, Leptoclidus, from the Wealden Group of Sussex.
More recent acquisitions include two Pliensbachian ichthyosaurs from the Dorset coast, one of which is the type specimen of Leptonectes moorei.
Country of origin
Britain
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Plesiosaurus macrocephalus, a large-skulled plesiosaur found by Mary Anning
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A fossil specimen of an Ichthyosaurus communis from the Lower Lias, Lyme Regis, Dorset.
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A fossil specimen of the extinct fish-like marine reptile Ichthyosaurus acutirostris from Germany. It lived during the Lower Jurassic period 205-180 million years ago.
Important historical collections
- Mary Anning
- Alfred Leeds
- Thomas Hawkins
- Earl of Enniskillen
Related information

Collections on the move
We have set out on an ambitious programme to develop a new science and digitisation centre. As we prepare for the move, access to some collections will be affected.
Find out more and sign up to our newsletter to receive updates on changes to collections access, relevant news and opportunities to get involved.

Accessing the collections
Scientists and collections management specialists can visit the collections and borrow specimens for research.
Collections management
Our duty is to provide a safe and secure environment for all of our collections.