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Raphidiophryidae Mikrjukov, 1996

Diagnosis: periplast typically containing tangential siliceous plates surrounded by a hollow marginal rim but never goblet-shaped or other radial scales.

Type genus Raphidiophrys Archer,1867

Included genera:

Raphidiophrys (six freshwater spp.).
Heteroraphidiophrys (one marine species).
Pseudoraphidiophrys (four freshwater spp.) lacking the hollow rim.

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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

Centropyxis nauwercki, after Schönborn, 1975 Centropyxis nauwercki  Schönborn, 1975 Diagnosis: Shell divided by a ring groove into a highly convex, balloon-shaped fundus part and a

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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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