Microworld

world of amoeboid organisms

Menu
Microquadrula spec.
Microquadrula spec. – arrow indicates pseudostome – Florida

Microquadrula spec.

Diagnosis: Shell ovoid, hyaline and transparent, covered with square or rectangular calcareous plates, embedded in a chitinous and colorless membrane. Plates, juxtaposed or covering each other partially, are arranged in vertical or more or less oblique series. Plates are arranged in 4-8 transverse rows. Pseudostome circular, obliquely truncated. Nucleus and pseudopods not observed.

 Dimensions: length 37-45 µm long and diameter 23 µm./>

Remarks: I found ample empty shells in a sample brought to me from Wellington, Florida (GPS 26.66669 -80.23204) by Sandra Redeker (2014). The sample came from waterplants in a shallow pond. These shells resembled those as described for Microquadrula musciphila, but without the small plates around the pseudostome. A main distinction between Lamtoquadrula and Microquadrula is that the plates of the latter genus easily dissolve in hydrochloric acid, which indicates that the plates aren’t siliceous, but are made of calcite.

Microquadrula spec.
REM photograph – Eckard Voelcker, Berlin
Microquadrula spec.
Microquadrula spec. – Florida
Microquadrula spec.
Microquadrula spec.
Microquadrula spec. – Florida
Microquadrula spec.
Microquadrula spec.
Shell after treatment with hydrochloric acid, which dissolved the calcite plates, leaving an organic skeleton.
Microquadrula spec.
Microquadrula spec.
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 »