Clevosaurus hudsoni

Overview

Clevosaurus hudsoni is a Late Triassic reptile known from material of the head, neck, and forelimbs. Its postcranial bones have also been compared with other Clevosaurus species. Questions can thus expand from differences in the face to differences in the limbs.^[1][2]

Key facts

The shaft of its tibia is described as long, cylindrical, and curved. It is compared with the short, thick tibia of another closely related species. Even animals of the same genus can differ in the shape of their leg bones.^[2]

Time and place

Late Triassic Rhaetian material from Cromhall in present-day Britain has been studied. The entire Triassic spanned approximately 250–200 million years ago. Specimens from this area provide comparative information about the head and body.^[1][3]

The time range describes source context, not the complete duration of this species.

Size, form and skeleton

NHMUK PV R36832 includes a partial skull, neck vertebrae, and forelimb material. Other comparative research explicitly discusses trunk vertebrae, ribs, femora, and tibiae under this species name. Different features can be explored in each region of the body.^[1][2]

A report surveying British fossil localities describes Clevosaurus hudsoni as usually approximately 15–20 cm long, with large individuals reaching approximately 25 cm. It was a small reptile with an elongated body and limbs.^[9]

Habitat and reproduction

How might limbs differ within the same group? Comparative studies of Clevosaurus examined the trunk, shoulders, pelvis, and limb bones together. They compared small reptiles through structures supporting the body as well as through the head.^[2]

Fossil discovery

Cranial research and comparisons of postcranial bones addressed different parts of Clevosaurus hudsoni. They also described preservation in which some bones had moved inside the skull after death. These studies read body structure alongside the process of fossil preservation.^[1][2]

References

1. Study — Cranial diversity in Clevosaurus
2. 2009 study — Postcranial skeletal comparisons of Clevosaurus
3. International Commission on Stratigraphy (2024) — Geological time chart
4. Study — Aerodynamics of Late Triassic British kuehneosaurids
5. International Commission on Stratigraphy (2024) — Geological time chart
6. Study — Cranial diversity in Clevosaurus
7. International Commission on Stratigraphy (2024) — Geological time chart
8. 2009 study — Postcranial skeletal comparisons of Clevosaurus
9. JNCC — British Triassic fossil reptile localities

Research questions

If an arm bone appears inside a skull, was it there during life? Fossils sometimes preserve bones that moved after death together. Examining their positions and connections closely helps explain the original organization of the body.^[1]

Observation

Move your gaze from the head and neck to the trunk, forelimbs, and hind limbs. Focusing on one part, such as the tibia, can reveal different forms even among closely related species.^[1][2]