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Scratching an ancient itch: an Eocene bird louse fossil
Torsten Wappler1, Vincent S Smith, Robert C Dalgleish
1Department of Geology, Palaeontology and Mineralogy, Hessisches Landesmuseum Darmstadt, Friedensplatz 1, 64283 Darmstadt, Germany.
Proceedings. Biological Sciences
|October 27, 2004
Summary
The first fossil of a bird louse (Phthiraptera) was discovered in Germany, dating back 44 million years. This finding confirms the ancient coevolutionary history between lice and birds, possibly originating from feathered dinosaurs.
Area of Science:
- Paleontology
- Entomology
- Evolutionary Biology
Background:
- The fossil record for insect orders is extensive, with parasitic lice (Phthiraptera) being a notable exception.
- Understanding the evolutionary history of lice is crucial for comprehending insect-bird coevolution.
Purpose of the Study:
- To report the discovery and analysis of the first fossil bird louse.
- To investigate the phylogenetic position and paleoecological context of this ancient ectoparasite.
Main Methods:
- Exceptional fossil preservation in the Eckfeld maar (Germany) allowed for detailed morphological analysis.
- Phylogenetic analysis was conducted on the fossil specimen.
- Palaeoecological data were used to infer the host association.
Main Results:
- A 44-million-year-old, exceptionally preserved fossil identified as a bird louse was discovered.
- The fossil exhibits phylogenetic affinities with modern ectoparasites of aquatic birds.
- Preserved feather remnants in the fossil's gut confirm its ectoparasitic nature and host association.
Conclusions:
- The fossil confirms a long coevolutionary history between lice and birds, dating back at least 44 million years.
- The louse likely parasitized a large ancestor of modern Anseriformes or Charadriiformes.
- This discovery suggests an early origin for lice, potentially inherited from early-feathered theropod dinosaurs.