| Morphological stasis of protists in lower cretaceous amber. | |
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MedLine Citation:
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PMID: 18032106 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Paleomicrobiological studies of terrestrial and freshwater protists are extremely rare in comparison with studies of eukaryotic microfossils from marine ecosystems. Using optical and electron microscopy (SEM-BSE) for hard substrates, we have examined protists trapped in Lower Cretaceous amber from Peñacerrada (Alava, Spain). We present the earliest reasonably confident microfossils of three taxa: Excavata (Euglenozoa), that are similar to the extant genera Euglena and Phacus; Chlorophyceae identified as members of the genus Chlamydomonas, and finally, in the taxon Ciliophora (Chromalveolata), two ciliated protozoa identified as Colpoda (Class Colpodea) and Prorodon (Class Prostomatea). Morphological stasis is evident, and identification based on phenotypic traits indicates the existence of conservative phenotypes persisting over geological time scales. |
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Authors:
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Ana Martín-González; Jacek Wierzchos; Juan C Gutiérrez; Jesús Alonso; Carmen Ascaso |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-11-26 |
Journal Detail:
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Title: Protist Volume: 159 ISSN: 1434-4610 ISO Abbreviation: Protist Publication Date: 2008 Apr |
Date Detail:
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Created Date: 2008-03-31 Completed Date: 2008-06-05 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 9806488 Medline TA: Protist Country: Germany |
Other Details:
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Languages: eng Pagination: 251-7 Citation Subset: IM |
Affiliation:
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Departamento de Microbiología-III, Universidad Complutense, 28040 Madrid, Spain. anamarti@bio.ucm.es |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amber
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chemistry* Animals Chlamydomonas / isolation & purification, ultrastructure Ciliophora / isolation & purification, ultrastructure Euglena / ultrastructure, virology Eukaryota / classification, isolation & purification*, ultrastructure* Evolution Fossils* Microscopy, Electron, Scanning Spain |
| Chemical | |
Reg. No./Substance:
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0/Amber |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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