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

Raphidocystis glabra

after Zlatogursky et al., 2018 Raphidocystis glabra Dürrschmidt, 1985 Diagnosis: Periplast 40-50 μm in diameter; spine-scales 4.6–15 μm; plate-scales 6-7 × 3-3.5 μm; tiny teeth

Read More »

Raphidocystidae

Raphidocystidae Zlatogursky, 2018 Diagnosis: centrohelids with monolayered plate-scales covering cell surface. Plate-scales with a hollow inflected margin. Sometimes trumpet-shaped or tubular spine-scales present, forming an

Read More »

Planhoogenraadia liboica

P. liboica – from Bonnet, 1979 Planhoogenraadia liboica Bonnet, 1979 Diagnosis: . Test relatively flat, with a dorsal convexity. Shell widest in the center. Aperture deep

Read More »

Deharvengia papuensis

Deharvengia papuensis, after Bonnet, 1979 Deharvengia papuensis  Bonnet, 1979 Diagnosis: Theca large, ovoid, very regular, colorless. Elliptical pseudostome bordered by a thick yellowish lip or

Read More »