Small Subunit Ribosomal DNA Suggests that the Xenophyophorean Syringammina corbicula is a Foraminiferan

Autor(en)

Jan Pawlowski, Maria Holzmann, José F. Fahrni, Susan L. Richardson

Abstrakt

Xenophyophorea are giant deep-sea rhizopodial protists of enigmatic origins. Although species were described as Foraminifera or sponges in the early literature, the xenophyophoreans are currently classified either as a class of Rhizopoda or an independent phylum. To establish the phylogenetic position of Xenophyophorea, we analysed the small subunit (SSU) rRNA gene sequence of Syringammina corbicula Richardson, a newly described xenophyophorean species from the Cape Verde Plateau. The SSUrDNA analyses showed that S. corbicula is closely related to Rhizammina algaeformis, a tubular deep-sea foraminiferan. Both species branch within a group of monothalamous (single-chambered) Foraminifera, which include also such agglutinated genera as Toxisarcon, Rhabdammina, and Saccammina, and the organic-walled genera Gloiogullmia and Cylindrogullmia. Our results are congruent with observations of similar cytoplasmic organisation in Rhizammina and Syringammina. Thus, the Xenophyophorea appear to be a highly specialised group of deep-sea Foraminifera.

Organisation(en)

Institut für Paläontologie

Externe Organisation(en)

Universität Genf, Smithsonian National Museum of Natural History

Journal

The Journal of Eukaryotic Microbiology

Band

50

Seiten

483-487

Anzahl der Seiten

5

ISSN

1066-5234

Publikationsdatum

2003

Peer-reviewed

Ja

ÖFOS 2012

105118 Paläontologie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/36f984b8-05b7-4a64-8c0f-ae2af2d32d9d