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Genus Nolandella Page, 1983

Diagnosis: Locomotive form limax-like, usually around 12 µm long, displaying frequent changes in direction. Unusual among the hartmannellids in that some cells show eruptive activity. At the ultrastructural level, surface coat with hexagonal elements extending 30 nm above plasma membrane. Floating form with blunt radiating pseudopodia
Type species: Nolandella hibernica (Page, 1980)

Ecology: Single marine species.

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Centropyxis tropica

C. tropica, after Deflandre, 1929 Centropyxis tropica  Deflandre, 1929 Basionym: Centropyxis aculeata var. tropica Deflandre, 1929 Diagnosis: As for C. aculeata, but with much longer

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Centropyxis nauwercki

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Centropyxis pontifera

Centropyxis pontifera, after Bartos, 1963 Centropyxis pontifera  Bartos, 1963 Diagnosis: Test large, broadly oval, formed of a thick, solid, brownish-yellow organic matter. Test with many

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Centropyxis pyriformis

Centropyxis pyriformis, after Van Oye, 1958 Centropyxis pyriformis  Van Oye, 1958 Diagnosis: This species is distinguished from C. aculeata by its narrowed shape towards the

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Centropyxis dentistoma

Centropyxis dentistoma, after Decloitre, 1949 Centropyxis dentistoma  Decloitre, 1949 Basionym: Centropyxis aculeata var. dentistoma Decloitre, 1949 Diagnosis: Pseudostome lobed, with 4 to 7 sharp teeth,

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Centropyxis compressa

Centropyxis compressa, after Van Oye, 1948 Centropyxis compressa  Van Oye, 1948 Diagnosis: Test a little elongated and very flattened regularly, like that of Arcella discoides;

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Centropyxis lata

Centropyxis lata, after Jung, 1942 Centropyxis lata  Jung, 1942 Diagnosis: Shell coarse-scaled, covered with a mix of diatoms and detritus; pseudostome large, ventral side mostly

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Centropyxis aurita

Centropyxis aurita, after Laminger, 1973 Centropyxis aurita  Laminger, 1973 Diagnosis: In ventral view, the shell is more or less broadly ovoid in outline. Quite straight truncated

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Centropyxis grelli

Centropyxis grelli, after Laminger, 1973 Centropyxis grelli  Laminger, 1973 Diagnosis: Shell covered with relatively large mineral particles. The pseudostome outline is formed by two convex arches.

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Centropyxis adami

Centropyxis adami, after Laminger, 1971 Centropyxis adami  Laminger, 1971 Diagnosis: In ventral view, the outline of the shell is more or less elliptical, in side

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