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Plagiopyxis labiata
Plagiopyxis labiata
Plagiopyxis labiata

Family Plagiopyxidae Bonnet et Thomas, 1960

Diagnosis: Lobose testate amoebae with bilaterally symmetrical organic test covered with fragments of mineral grains, diatoms and organic debris; aperture a more or less invaginated slit on the ventral side, eccentric, overhung by an anterior lip, in ventral view often difficult to observe (cryptostome).

1Anterior lip of pseudostome a distinct, overhanging hood6
Aperture more or less slit-like, no overhanging hood2
2Anterior lip of pseudostome with poresBullinularia
No such pores3
3Anterior (dorsal) lip curves below convex ventral faceGeoplagiopyxis
Posterior (ventral) lip curves below anterior lip, or pseudostome is an open slit4
4Aperture covered by the anterior lip5
Aperture is an open slitProtoplagiopyxis
5Posterior (ventral) lip with extension towards anterior lip and connected to the dorsal side of the test from insideParacentropyxis
No extension of the posterior lipPlagiopyxis
6Ventral area (sole) roundedHoogenraadia
Ventral area (sole) flattenedPlanhoogenraadia

after Meisterfeld, 2002

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