PsammonobiotidaeRalf Meisterfeld and Edward Mitchell
This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.
You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species.close box
Test more or less shaped like a Greek vase, with funnel-shaped or disk-like apertural collar; aperture may be terminal or more or less bent to one side; clear or with attached or embedded particles.
The concept of the Family applied here differs from that of Golemansky (1974) in that genera with round or oval siliceous idiosomes are excluded and placed with the Euglyphida; those with terminal collar like Micramphora, Nadinella and Ogdeniella are included. Whether these genera form a natural group is open to dispute. The striking similarity of the apertural structures is perhaps only a convergence as a result of the selective pressure in the interstitial environment.
The genera of this family are separated mainly by characters of the shell. None of the species has been established in clonal culture, a critical evaluation of the diagnostic characters is lacking. The distinctions between the genera have been partly lost by recent species descriptions - and this also may make identification to genus difficult.
Golemansky, V. 1974. Psammonobiotidae, a new family of thecamoebans (Rhizopoda, Testacea) from supralittoral sea sandstones. Acta Protozoologica 13(11):137-142.
This page is being developed as part of the Tree of Life Web Project Protist Diversity Workshop, co-sponsored by the Canadian Institute for Advanced Research (CIFAR) program in Integrated Microbial Biodiversity and the Tula Foundation.
University of Neuchâtel
Correspondence regarding this page should be directed to Ralf Meisterfeld at and Edward Mitchell at
Page copyright © 2009 and Edward Mitchell
All Rights Reserved.
- First online 06 May 2009
- Content changed 06 May 2009
Citing this page:
Meisterfeld, Ralf and Edward Mitchell. 2009. Psammonobiotidae http://tolweb.org/Psammonobiotidae/124622/2009.05.06 in The Tree of Life Web Project, http://tolweb.org/. Version 06 May 2009 (under construction).