Feather-like Structures on the Back of Mirasaura: Evidence from the Middle Triassic
- 演化之聲
- Mar 14
- 5 min read
A fossil of a small diapsid reptile discovered in the Vosges Mountains of northeastern France has revealed an unusual body structure dating to roughly 247 million years ago in the Middle Triassic. The specimen is remarkable for a series of dorsal skin appendages arranged along its back. These structures resemble feathers in overall appearance, yet they are neither true feathers nor comparable to the scales or other skin derivatives known in modern reptiles. Researchers named the species Mirasaura grauvogeli. The genus name combines the Latin words mirus (“marvellous” or “wonderful”) and saura (“reptile”), while the species name honours Louis Grauvogel, whose work in excavating the Voltzia Sandstone sites contributed significantly to the discovery of the fossil material.
The animal itself was extremely small. Its skull measured only about 17 millimetres in length, and the skeleton overall was slender and lightly built. The fossil shows an elongated snout, a slightly domed skull roof, and forward-facing eye sockets. These features give the skull a superficial resemblance to those of birds or pterosaurs, yet phylogenetic analyses indicate that the species was only distantly related to those groups. Instead, it belongs to Drepanosauromorpha, an unusual lineage of reptiles known exclusively from the Triassic period. Members of this clade are widely interpreted as arboreal specialists.
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