Microworld

world of amoeboid organisms

Menu
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

     

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 »