PyxidiculaRalf Meisterfeld and Edward Mitchell
Eight species, type species: Pyxidicula operculata (Agardh, 1827) Ehrenberg, 1838. Refs: Penard (1902), Doflein (1916), Ogden (1987a).
Shell hemispherical, bowl-shaped, the aperture is almost as wide as the diameter of the shell, apertural rim usually recurved outside. Shell wall areolate, composed of organic, hollow building units, which in older, brown specimens become filled with inorganic material like manganese. One vesicular nucleus. During mitosis the nuclear membrane and the nucleolus remain intact with an intranuclear spindle apparatus (closed orthomitosis). One contractile vacuole. Feeding: algae, bacteria.
Habitat: freshwater plants.
Doflein, F. 1916. Studien zur Naturgeschichte der Protozoen. VIII. Pyxidicula operculata (Agardh). Zool. Jb., 39:585-647.
Penard, E. 1902. Faune rhizopodique du Bassin de Léman. Kündig, Genève.
Ogden, C. G. 1987a. The fine structure of the shell of Pyxidicula operculata, an aquatic testate amoeba (Rhizopoda). Arch. Protistenk., 133:157-164.
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University of Neuchâtel
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- First online 02 September 2008
- Content changed 02 September 2008
Citing this page:
Meisterfeld, Ralf and Edward Mitchell. 2008. Pyxidicula http://tolweb.org/Pyxidicula/124483/2008.09.02 in The Tree of Life Web Project, http://tolweb.org/. Version 02 September 2008 (under construction).