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Naked foraminiferans revealed (1999)

Pawlowski, Jan ; Bolivar, Ignacio ; Fahrni, José ; [et al.]

[s.l.] : Macmillan Magazines Ltd.

Nature 399 (1999), S. 27-27

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] It is generally assumed that the first fossil appearance of a group of organisms corresponds to its evolutionary origin. But we have molecular evidence that extant members of the most abundant microfossil-forming group, the Foraminifera, include ‘naked’ amoeboid species, indicating ...

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1038/19881

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Molecular Evidence That Reticulomyxa Filosa Is A Freshwater Naked Foraminifer (1999)

PAWLOWSKI, JAN ; BOLIVAR, IGNACIO ; FAHRNI, JOSE F. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

The @journal of eukaryotic microbiology 46 (1999), S. 0

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ISSN: 1550-7408

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology

Notes: Reticulomyxa filosa is a freshwater protist possessing fine granular, branching and anastomosing pseudopodia and therefore traditionally placed in the class Granuloreticulosea, order Athalamida, as a sister group to the order Foraminiferida. Recent studies have revealed remarkable similarities in pseudopodial motility and ultrastructure between R. filosa and foraminifera (e.g. Allogromia laticollaris), prompting us to conduct a molecular phylogenetic analysis of these seemingly disparate organisms. We sequenced the complete small-subunit of the ribosomal DNA of the cultured strain of R. filosa and compared it to the corresponding sequences of other protists including 12 species of foraminifera. We also sequenced and analyzed the actin coding genes from R. filosa and two species of foraminifera, Allogromia sp. and Ammonia sp. the analysis of both data sets clearly shows that R. filosa branches within the clade of foraminifera, suggesting that R. filosa is in fact a freshwater naked foraminiferan.