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The collection/Temnodontosaurus

EXHIBIT 272

Temnodontosaurus

Temnodontosaurus platyodon

Marine reptile

An Early Jurassic ichthyosaur whose jaws and teeth reveal specialized prey-processing anatomy. [1]

Evidence profile

TWO WAYS TO PICTURE THE PAST

Compare the evidence with the familiar movie image. The illustrations are not to a shared scale.

01 / SOURCE-INFORMED RECONSTRUCTION

A life reconstruction from the evidence

Illustrative life reconstruction of Temnodontosaurus in a period-appropriate environment; coloration and missing anatomy are interpretations.

An illustrative reconstruction. Compare its anatomy with the evidence and limitations in the dossier. [1]

Source-informed reconstruction. Appearance evidence [1]. Original illustration; missing anatomy, coloration and scenery include interpretation.

Fossils constrain this life reconstruction. Missing anatomy, coloration and the environmental scene include interpretation; the dossier explains the evidence limits.

02 / MOVIE-STYLE INTERPRETATION

A cinematic imagination

Illustrative life reconstruction of Temnodontosaurus in its interpreted aquatic environment.

An illustrative reconstruction. Compare its anatomy with the evidence and limitations in the dossier. Lighting, coloration and scenery are artistic choices. This image does not document a fossil locality or behavior.

Original artwork · artistic interpretation.

Scientific view: source-informed reconstruction, credited paleoart or specimen-based imagery. Movie-style view: Original artistic interpretation. Reconstructions involve uncertainty.

PERIODEarly Jurassic[3]
DIETCarnivore (cephalopods documented)Evidence and uncertainty in the dossier
TOTAL LENGTHSee the dossierEstimate scope matters
FOSSILS FOUNDUnited Kingdom[3]
CompareRead the dossierView the sources

MEET THE ANIMAL

Meet Temnodontosaurus

Temnodontosaurus platyodon was an ichthyosaur from Early Jurassic seas. Its long, sturdy jaws and different tooth shapes attracted researchers studying how marine reptiles captured and processed prey. Teeth near the front and back of the mouth supplied different anatomical clues. [D1]

The study also reports cephalopod hooklets associated with this species. These tiny structures come from relatives of squid and offer evidence beyond tooth shape. Other species placed in Temnodontosaurus have different feeding evidence, so a meal linked to one species should not automatically become another species’ menu. [D1]

The museum recounts the famous Lyme Regis discovery connected with Mary Anning and her brother Joseph. Discoveries like this helped people recognize extraordinary marine animals in rocks. Their fossils can remain scientifically useful long after excavation, as researchers return with new questions and methods. [D3]

Scientists are still checking which species belong together in this genus. That is why this exhibit focuses on the type species, the one that anchors the name. A striking feature found in a different, unassigned specimen cannot simply be added to its picture. Careful identification keeps the animal’s story connected to the right evidence. [D2]

PREHISTORIC ANIMAL DOSSIER

A life in profile.

The animal, the evidence, and the questions still open.

Dental comparisons and reported gut remains inform feeding. They do not establish a type-species mass range, courtship or social organization. [D1]

Profile scope: One genus exhibit restricted to the type species T. platyodon; uncertain species assignments and the 2025 unassigned flipper are excluded. [D2]

Time
Early Jurassic
Fossil locations in this exhibit
United Kingdom
How to read the evidence

Source supported identifies a description documented by the cited source. Inferred marks a reconstruction or functional estimate. Debated marks competing interpretations. Not established means the sources reviewed for this dossier do not support a firm conclusion; it does not mean a behavior never occurred.

A size reference is an estimate, not a population range. Nesting evidence does not by itself establish courtship, mate choice, or lifelong pairing.

Length

Not established

Not established here

Reviewed skull studies do not provide a validated T. platyodon adult length range; larger genus-wide estimates are excluded. [D2]

Mass

Not established

Not established here

The inspected craniodental study does not supply a validated body-mass model for the type species. [D1]

Diet

Source supported

Cephalopods; other prey unresolved

The study reports dense cephalopod hooklets associated with T. platyodon; vertebrate prey in T. trigonodon is separate evidence. [D1]

Habitat

Source supported

Early Jurassic marine Britain

The museum recounts the Lyme Regis discovery associated with the type species; exact swimming depth is unknown. [D3]

Locomotion

Inferred

Ichthyosaur swimming

Marine ichthyosaur comparisons support swimming. A newly studied unassigned flipper cannot establish T. platyodon’s special surface structures or silence. [D3]

Anatomy

Source supported

Robust elongate snout and differentiated teeth

T. platyodon has distinct front/rear tooth forms; broader Temnodontosaurus species have different skull shapes. [D1]

Reproduction & life together

Reproduction

Inferred

Live-bearing expected by comparison

Ichthyosaur pregnancies support comparison; no attributable T. platyodon pregnancy was inspected here. [D5]

Courtship and mating

Not established

Not established here

Focused searches and the reviewed taxonomy supply no direct mating-display evidence for the type species. [D2]

Social behavior

Not established

Not established here

Cranial comparisons do not demonstrate group living, pair bonds or parental care. [D2]

Dossier research & sources

Sources and inspection notes for the claims in this profile.

  1. Craniodental ecomorphology of the large Jurassic ichthyosaurian TemnodontosaurusJournal of Anatomy / Bennion et al. (2024) · Accessed 2026-10-09Abstract, species comparisons, T. platyodon tooth morphology, feeding Discussion and reported cephalopod gut remains inspected. T. trigonodon vertebrate prey and other species’ deep skulls are not transferred. · Inspected: page
  2. Anatomy and phylogenetic relationships of Temnodontosaurus zetlandicus (Reptilia: Ichthyosauria)Zoological Journal of the Linnean Society / Laboury et al. (2022) · Accessed 2026-10-09Original PDF inspected: abstract, comparative T. platyodon references, genus delimitation and phylogeny. Details of T. zetlandicus are not presented as type-species anatomy. · Inspected: page
  3. Giant ichthyosaurs evolved stealthy flippers to sneak up on preyNatural History Museum, London / James Ashworth (2025) · Accessed 2026-10-09Museum article inspected: Anning discovery history and limits of the new Temnodontosaurus sp. flipper. Serrated chondroderms and genus-wide maximum dimensions are not assigned to T. platyodon. · Inspected: page
  4. Temnodontosaurus platyodon: NHMUK PV R1158 specimen recordNatural History Museum, London · Accessed 2026-10-09Museum data excerpt inspected: scientific name and PV R1158. Direct HTTP blocked; unexposed specimen fields are not claimed. · Inspected: excerpt
  5. Heads or tails first? Evolution of fetal orientation in ichthyosaurs, with a scrutiny of the prevailing hypothesisBMC Ecology and Evolution / Miedema et al. (2023) · Accessed 2026-10-09Original comparative pregnancy study inspected. No attributable T. platyodon pregnancy found in it; only ichthyosaur-group inference is used. · Inspected: page

THE STORY IN THE FOSSILS

Reading the evidence

Tooth mechanics and gut remains answer different feeding questions; neither establishes a complete diet. [1]

The London museum describes a newly studied flipper without assigning it to T. platyodon. Its unusual structures should remain attached to that specimen rather than becoming decoration on every reconstruction. [3]

A note on scale and time

The dossier identifies the scope of each reference estimate. A mount, an individual fossil and a species-wide adult range are different measurements. Comparison metrics remain unavailable where adult scope has not been established. Unknown does not mean zero.

Sources & editorial notes

Sources support the stated claims and scopes. Refer to the evidence notes for uncertainty.

  1. Craniodental ecomorphology of the large Jurassic ichthyosaurian TemnodontosaurusJournal of Anatomy / Bennion et al. (2024) · Accessed 2026-10-09Abstract, species comparisons, T. platyodon tooth morphology, feeding Discussion and reported cephalopod gut remains inspected. T. trigonodon vertebrate prey and other species’ deep skulls are not transferred. · Inspected: page
  2. Anatomy and phylogenetic relationships of Temnodontosaurus zetlandicus (Reptilia: Ichthyosauria)Zoological Journal of the Linnean Society / Laboury et al. (2022) · Accessed 2026-10-09Original PDF inspected: abstract, comparative T. platyodon references, genus delimitation and phylogeny. Details of T. zetlandicus are not presented as type-species anatomy. · Inspected: page
  3. Giant ichthyosaurs evolved stealthy flippers to sneak up on preyNatural History Museum, London / James Ashworth (2025) · Accessed 2026-10-09Museum article inspected: Anning discovery history and limits of the new Temnodontosaurus sp. flipper. Serrated chondroderms and genus-wide maximum dimensions are not assigned to T. platyodon. · Inspected: page
  4. Temnodontosaurus platyodon: NHMUK PV R1158 specimen recordNatural History Museum, London · Accessed 2026-10-09Museum data excerpt inspected: scientific name and PV R1158. Direct HTTP blocked; unexposed specimen fields are not claimed. · Inspected: excerpt
  5. Heads or tails first? Evolution of fetal orientation in ichthyosaurs, with a scrutiny of the prevailing hypothesisBMC Ecology and Evolution / Miedema et al. (2023) · Accessed 2026-10-09Original comparative pregnancy study inspected. No attributable T. platyodon pregnancy found in it; only ichthyosaur-group inference is used. · Inspected: page

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