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).

 

1

Anterior lip of pseudostome a distinct, overhanging hood

6

-

Aperture more or less slit-like, no overhanging hood

2

2

Anterior lip of pseudostome with pores

Bullinularia

-

No such pores

3

3

Anterior (dorsal) lip curves below convex ventral face

Geoplagiopyxis

-

Posterior (ventral) lip curves below anterior lip, or pseudostome is an open slit

4

4

Aperture covered by the anterior lip

5

-

Aperture is an open slit

Protoplagiopyxis

5

Posterior (ventral) lip with extension towards anterior lip and connected to the dorsal side of the test from inside

Paracentropyxis

-

No extension of the posterior lip

Plagiopyxis

6

Ventral area (sole) rounded

Hoogenraadia

-

Ventral area (sole) flattened

Planhoogenraadia

 

 

after Meisterfeld, 2002