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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/17922
Título

Morphological stasis of protists in lower Cretaceous Amber

AutorMartín González, Ana; Wierzchos, Jacek ; Gutiérrez, Juan Carlos; Alonso, Jesús ; Ascaso, Carmen
Palabras claveAmber
Lower Cretacous
Protists
Morphological stasis
Paleomicrobiology
Fecha de publicación2008
EditorElsevier
CitaciónProtist 159: 251-257 (2008)
ResumenPaleomicrobiological 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 Pen˜ acerrada (A´ lava, 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.
Descripción8 pages, and figures, ans tables statistics
Versión del editorhttp://dx.doi.org/10.1016/j.protis.2007.08.006
URIhttp://hdl.handle.net/10261/17922
DOI10.1016/j.protis.2007.08.006
ISSN1434-4610
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