Padaungiella lageniformis

(Penard, 1890) Lara & Todorov, 2012

Most likely ID: n.a.

 

Synonym: Nebela lageniformis

 

Sampling location: Ulmisried

 

Phylogenetic tree: Padaungiella lageniformis

 

Diagnosis: 

  • test lageniform
  • length 100–160 µm, width 60–90 µm
  • posterior half of test circular or elliptical
  • anterior half of test elongated neck
  • test laterally compressed
  • pseudostome ovoid
  • test composed of circular or elliptical plates
  • plates fixed in organic matrix
Padaungiella-lageniformis
Padaungiella lageniformis

So far, I have found only one specimen of Padaungiella lageniformis in the Ulmisried in September 2016. Since the layer thickness under the coverslip was still large enough, I was able to rotate the specimen and thus document not only the frontal view (s. fig. 1 a and b) but also the flattened, lateral view (s. fig. 1 c and d). At 156 µm in length, the specimen is very large. However, Padaungiella lageniformis is known to exhibit high size variability (Kosakyan et al., 2025). The thickness of my specimen in lateral view was 47 µm.

 

More images and information on Padaungiella lageniformis: Ferry Siemensma-Microworld-Padaungiella lageniformis

Padaungiella-lageniformis

Fig. 1 a-d: Padaungiella lageniformis. L = 156 µm. Different focal planes in frontal view (a, b) and in lateral view (c, d). Nu = nucleus. Obj. 40 X.

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