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| TITLE: | Bacteria and protists from Middle Cretaceous amber of Ellsworth County, Kansas
| | AUTHOR: | Benjamin M. Waggoner
| | JOURNAL: | PaleoBios
| | PUBLISHED: | Jul 13, 1996
| | NOTES: | 17(1)
| | ABSTRACT: | Microfossils of sheathed bacteria and amoebae are reported from the middle Cretaceous amber of Ellsworth County, Kansas. The sheathed bacteria are morphologically very close to the living genus Leptothrix. Testate amoebae resemble the modern genera Pontigulasia and Nebela; these are the oldest fossil representatives of these genera. Other microfossils represent unicellular protists of some sort but cannot be identified further. This microfossil assemblage, similar to that in late Triassic amber from Bavaria, probably indicates an aquatic, oligo-mesosaprobic paleomicrohabitat. It also provides direct confirmation of morphological stasis in the amoeban taxa, which has been previously inferred from comparative molecular sequencing and biogeographical distribution.
| | COLLECTION: | PaleoBios Archive Public
| | ID: | 214
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