Individual of Centropyxis among filamentous algae, copyright John C. Walsh.

Belongs within: Arcellinida.

The Centropyxiidae are a group of testate amoebozoans with a chitinous test into which sand or other foreign matter has been incorporated (Loeblich & Tappan 1964).

Characters (from Loeblich & Tappan 1964): Test chitinous, enclosing some foreign material or with sandy layer, generally with dorsoventral symmetry; aperture ventral, with recurved margin, eccentric; single nucleus.

<==Centropyxiidae [Conchulina]
    |--Centropyxiella Valkanov 1970 G86
    |    |--C. arenaria Valkanov 1970 G86
    |    |--C. elegans Valkanov 1970 G86
    |    |--C. gibbula Valkanov 1970 G86
    |    |--C. gibbulina Chardez & Thomas 1980 G86
    |    |--C. golemanskyi Chardez 1977 G86
    |    |--C. lucida Golemansky 1971 G86
    |    |--C. oopyxiformis Chardez 1977 G86
    |    `--C. platystoma Golemansky 1981 G86
    `--Centropyxis Stein 1859 (see below for synonymy) LT64
         |--*C. aculeata (Ehrenberg 1832) [=Arcella aculeata, *Echinopyxis aculeata] LT64
         |--C. aerophila [incl. C. aerophila var. sphagnicola] LNB03
         |--C. cassis LNB03
         |--C. constricta [incl. C. constricta var. minima] LB90
         |--C. ecornis SX97
         |--C. gasparella LNB03
         |--C. globulosa LB90
         |--C. hemisphaerica SX97
         |--C. hirsuta SR06
         |--C. kahli LNB03
         |--C. laevigata Penard 1902 NM05
         |--C. marsupiformis N03
         |--C. orbicularis SX97
         |--C. plagiostoma LB90
         |--C. platystoma LNB03
         |--C. pleurostomelloides (Millett 1899) (see below for synonymy) LT64
         |--C. pontigulasiformis LNB03
         `--C. sylvatica [incl. C. sylvatica var. minor] LB90

Centropyxis Stein 1859 [=Echinopyxis Clapar├Ęde & Lachmann 1859; incl. Armillettum Rhumbler 1913, Millettella Rhumbler 1904] LT64

Centropyxis pleurostomelloides (Millett 1899) [=Reophax pleurostomelloides, *Armillettum pleurostomelloides, *Millettella pleurostomoides] LT64

*Type species of generic name indicated


[G86] Golemansky, V. G. 1986. Rhizopoda: Testacea. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 5–16. E. J. Brill/Dr. W. Backhuys: Leiden.

[LNB03] Ledeganck, P., I. Nijs & L. Beyens. 2003. Plant functional group diversity promotes soil protist diversity. Protist 154 (2): 239–249.

[LT64] Loeblich, A. R., Jr & H. Tappan. 1964. Sarcodina: chiefly “thecamoebians” and Foraminiferida. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt C. Protista 2 vol. 1. The Geological Society of America and The University of Kansas Press.

[LB90] Lousier, J. D., & S. S. Bamforth. 1990. Soil protozoa. In: Dindal, D. L. (ed.) Soil Biology Guide pp. 97–136. John Wiley & Sones: New York.

[N03] Nicholls, K. H. 2003. Form variation in Campascus minutus and a description of Campascus simcoei sp. n. (Testaceafilosea, Psammonobiotidae). European Journal of Protistology 39 (1): 103–112.

[NM05] Nikolaev, S. I., E. A. D. Mitchell, N. B. Petrov, C. Berney, J. Fahrni & J. Pawlowski. 2005. The testate lobose amoebae (order Arcellinida Kent, 1880) finally find theit home within Amoebozoa. Protist 156: 191–202.

[SR06] Schmidt, A. R., E. Ragazzi, O. Coppellotti & G. Roghi. 2006. A microworld in Triassic amber. Nature 444: 835.

[SX97] Song B. & Xie P. 1997. Preliminary studies on the community structure of the planktonic protozoa from the outlet of Lake Dongting. Acta Hydrobiologica Sinica 21 (Suppl): 60–68.

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