Palaeogeography: Devonian tetrapod from western Europe

Area of Science:

• Paleontology
• Vertebrate Evolution
• Devonian Period

Background:

• Late Devonian tetrapod discoveries have been geographically limited.
• Understanding early tetrapod diversity and distribution is crucial for evolutionary studies.

Purpose of the Study:

• To describe a newly discovered tetrapod jaw fossil from Belgium.
• To analyze its significance for Late Devonian tetrapod distribution and evolution.
• To provide insights into the paleoenvironment preceding a major tetrapod extinction event.

Main Methods:

• Geological dating of the fossil-bearing strata.
• Morphological comparison of the fossil jaw with known tetrapod species.
• Paleoenvironmental reconstruction of the discovery site.

Main Results:

• A 365-million-year-old tetrapod jaw fossil was identified in the Famennian of Belgium.
• The fossil exhibits strong morphological similarities to Ichthyostega, previously known only from Greenland.
• This represents the first occurrence of a tetrapod fossil from western continental Europe from this period.

Conclusions:

• The discovery expands the known geographic range of early tetrapods during the Late Devonian.
• The Belgian fossil provides a crucial link, suggesting wider distribution of tetrapod lineages like Ichthyostega.
• The paleoenvironment offers clues about the conditions influencing tetrapod survival before a significant fossil record gap.