Centropyxis elongata
C. elongata, after Penard, 1890 (upper row) and Thomas, 1959 (lower row)



Centropyxis elongata (Penard, 1890) Thomas, 1959


Diagnosis: Test in ventral view elliptic, elongated with almost parallel or slightly tapering lateral sides towards the aperture; test covered with irregular, transparent, thin, often flat xenosomes; posterior region in lateral view slightly inflated; aperture circular or semicircular, strongly biased towards the anterior margin, occupying a third of the entire length of the shell, commonly encrusted with mineral particles along the outer contour.


Dimensions: Length of test: Penard (1890) 60-75 μm, Thomas (1959) 56-65 μm, Lüftenegger et al. (1988) 47-63 μm (n=30);

width of test: Penard 25-40 μm, Thomas 29-33 μm, Lüftenegger et al. 29-36 μm;

width of aperture: Thomas 18-20 μm, Lüftenegger et al. 15-20 μm.


Ecology: Sphagnum, soils, humus.


Centropyxis elongata
C. elongata, after Lüftenegger et al., 1988




Lueftenegger, G., Petz, W., Berger, H., Foissner, W. and Adam, H.: Morphologic and Biometric Characterization of Twenty-four Soil Testate Amoebae (Protozoa, Rhizopoda) - Arch. Protistenkd. 136 (1988): 153-189

Thomas, R. (1959): Les Thécamoebiens muscicoles et terricoles: notions d'écologie générale et comparative. – P. Soc. Linn. Bordeaux 98: 27-53.