Overview
The fossilized wingbone of a pterosaur, dating back over 100 million years, underwent a process where its original bone material was consumed by microbes, which then formed a biofilm that subsequently calcified. This microbial activity resulted in the preservation of the bone's external and internal structures, including the marrow cavity.
Research Context
Pterosaurs were flying reptiles that inhabited the Earth more than 100 million years ago, during which time they hunted squid and fish over oceans. The fossil record of these creatures provides insights into ancient ecosystems and evolutionary processes. Understanding the mechanisms of fossilization, particularly in cases involving soft tissue or unusual decay pathways, contributes to the interpretation of paleontological evidence.
Approach
The research involved the examination of a pterosaur wingbone fossil. Analysis methods focused on characterizing the material that replaced the original bone and identifying the processes responsible for its preservation. The study specifically investigated the role of microbial activity in both the degradation and subsequent preservation of the bone structure.
Findings
- Microbes consumed the original bone material of the pterosaur wingbone.
- Following the consumption of the bone, the microbes formed a biofilm.
- This microbial biofilm subsequently calcified, replicating the bone's original form.
- The calcified biofilm preserved both the external morphology and internal structures, including the central marrow cavity, of the wingbone.
- The fossil represents a case where microbial destruction of bone led to its preservation through calcified microbial biofilm.
Why This Matters
This discovery provides a detailed example of a microbial role in both the destruction and subsequent preservation of ancient biological material. It highlights a specific taphonomic pathway where microbes act not only as agents of decay but also as facilitators of fossilization, demonstrating a complex interplay in the formation of paleontological specimens.