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Family Paraquadrulidae Deflandre, 1953

Diagnosis: Lobose testate amoebae with shell completely composed of endogenously formed rectangular calcite plates embedded in a sheet-like organic cement. The presence of calcite should be verified by polarizing microscopy, with hydrochloric acid, or X-ray- microanalysis.

Two genera:

 

Test oval or round

Paraquadrula

Test flask-shaped

Lamtoquadrula
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Apolimia

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Erugomicula bidens

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Velamentofex tyrolensis

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Raphidiophrys spec. nov.

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Lacogromia spec. Naardermeer

Lacogromia sp., Naardermeer, the Netherlands, 2022 (n=nucleus) Lacogromia sp. Six living specimens were found in an old sediment sample from a freshwater ditch in nature

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Sphenoderia rhombophora

S. rhombophora , after Bonnet, 1966 Sphenoderia rhombophora Bonnet, 1966 Diagnosis: Test hyaline, ellipsoidal, very slightly compressed. Fundus relatively narrow. Pseudostome largely truncated. Neck very

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Sphenoderia ovoidea

S. ovoidea , after Jung, 1942 Sphenoderia ovoidea Jung, 1942 Diagnosis: Shell with four layers of plate-scales. Distinguished from S. fissirostris by the ovoid tapering

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