Homoeosaurus maximiliani

Overview

Homoeosaurus maximiliani is a small Jurassic rhynchocephalian reptile. Old descriptions mention a short snout, slender body, and long limbs. Its features are now assessed using a reference specimen alongside new comparative studies.^[1][2]

Key facts

A comparison table for the neotype separately lists a forelimb length of 55 mm and a hind-limb length of 78 mm. In this specimen, the hind limbs are longer than the forelimbs. Simply measuring two parts of the same animal side by side reveals differences in its body organization.^[2]

Time and place

The neotype is compared with Late Jurassic fossils from the Solnhofen region of present-day southern Germany. The Jurassic spanned approximately 200–140 million years ago. Research has continued to compare the postcranial bones of small reptiles from this region.^[2][4]

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

Size, form and skeleton

Historical descriptions explain a short snout and a head that widens behind the eyes. The neotype SNSB-BSPG 1887 VI 502 has measurements of its forelimbs, hind limbs, and trunk in front of the pelvis. Head shape and limb arrangement offer different kinds of clues.^[1][2]

Habitat and reproduction

Limbs are as important as the head for understanding a small reptile’s life. Comparative studies measure forelimbs, hind limbs, and trunk length separately. Examining which parts are relatively long is a starting point for understanding body structure.^[2]

Fossil discovery

When an old species is compared again, clearly identifying a reference specimen is important. The neotype SNSB-BSPG 1887 VI 502 serves this role for Homoeosaurus maximiliani. It also provides a point of connection in studies revising the names of several old specimens.^[2][3]

References

1. Cocude-Michel (1963) — A study of Late Jurassic Rhynchocephalia
2. Zitteliana89:305–329, primary Brunn comparative paper, Table1 (bibliographyprovisional)
3. 2025 study — Postcranial bones and classification of Rhynchocephalia
4. International Commission on Stratigraphy (2024) — Geological time chart
5. Zitteliana study — Comparison of the limbs of Homoeosaurus
6. International Commission on Stratigraphy (2024) — Geological time chart
7. Cocude-Michel (1963) — A study of Late Jurassic Rhynchocephalia
8. Briggs et al. (2005) — Preservation of soft tissues and muscles in Mesolimulus
9. New Mexico State University Zuhl Museum — Mesolimulus specimen catalogue
10. International Commission on Stratigraphy (2024) — Geological time chart

Research questions

Two specimens formerly treated under this species name were later separated as Sphenodraco. Fossils grouped under one name can prove to represent different organisms after new comparisons. Such changes reveal that small Jurassic reptiles were more diverse than once thought.^[3]

Observation

Move your gaze from the short snout to the trunk and limbs. Examining forelimbs and hind limbs separately invites reflection on how their different lengths shape the body’s appearance.^[1][2]