Longinebela tubulosa
Longinebela tubulosa, 221 µm long – Tirol, Austria

 
Longinebela tubulosa (Penard, 1890) Kosakyan et al., 2016

Diagnosis: Test elongated pyriform in broad lateral view, laterally compressed, with the lateral margins tapering toward the pseudostome, creating a somehow distinct neck. Small lateral pores usually present but hard to observe. In profile narrow elliptical with a pointed posterior part. Test yellowish brown, composed of scales taken from predated organisms (euglyphids or rarely Quadrulella). Pseudostome oval in frontal view, surrounded by a thin organic collar.

Dimensions: Test L: 190–264 µm, B: 80–155 µm. Pseudostome 35–54 µm wide.

Ecology: Wet Sphagnum vegetation

Remarks: Cash (1909) described the presence of ‘fine punctulations’ around the neck of some specimens, which he considered was organic cement producing a rough surface, and the only other feature that appeared to vary was the mixture of shell plates. I have seen specimens with shells with a substantial part of organic cement (see the pictures below).

L. tubulosa, Vosges, France 2018
L. tubulosa, permafrost, Nuuk, Greenland 2018
L. tubulosa, 270 µm long
Longinebela tubulosa
L. tubulosa, 221 µm long – Tirol, Austria
Longinebela tubulosa
cf L. tubulosa, 182 µm long – Tirol, Austria
Longinebela tubulosa
L. tubulosa, 220 µm long – Tirol, Austria
Longinebela tubulosa
L. tubulosa, 220 µm long – Tirol, Austria

     

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