Microworld

world of amoeboid organisms

Menu
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

Recent posts

Penardochlamys arcelloides

P. arcelloides – from Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

Read More »

Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauss Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

Read More »

Velamentofex saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauss) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

Read More »

Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauss) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

Read More »

Velamentofex berolinensis

V. berolinensis Velamentofex berolinensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 50-300 µm, with a hyaline, extremely flexible, membranous test. Nuclei numerous, 11.6-16.2 µm in diameter,

Read More »

Lieberkuehniidae

 Lieberkuehniidae  Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test very flexible, elongated to broadly

Read More »