Argynnia dentistoma
Argynnia dentistoma, 117 µm long – Tirol, Austria

Genus Argynnia Vucetich, 1974

Diagnosis: Shell compressed, aperture surrounded by siliceous plates, giving it a rough outline. Shell greyish, composed of various euglyphid plates, mixed with diatom fragments and mineral particles, porous cement. The structure of the test is intermediate between Nebela and Difflugia. Nucleus: ovular.

Type species: Argynnia schwabei.

Remarks: This genus was proposed by Jung (1942b) without type designation and validated by Vucetich (1974) including only three species from the southern hemisphere.

Its taxonomic position within Hyalosphenidae or even Difflugina is questionable.

Argynnia dentistoma
Argynnia dentistoma, 117 µm long, with apertural scales
Recent posts

Microcorycia spec. 4

Microcorycia spec. , folded Microcorycia spec.? I found this specimen in a sample from moss on a fallen tree in a marsh in the Naardermeer,

Read More »

Microchlamys spec.

Microchlamys spec., the same cell in lateral view Microchlamys spec. Diagnosis: Shell relatively high compared with all described species. The diameter is twice the height.

Read More »

Excentrostoma

Infraorder Excentrostoma Kosakyan et al., 2016   Diagnosis: Testate amoebae with an eccentrically placed aperture; test organic with few or many xenosomes. Family Centropyxidae Jung, 1942  

Read More »

Longithecina

Infraorder Longithecina Kosakyan et al., 2016   Diagnosis: Testate amoebae with a more or less tubular or cylindrical test and a terminal aperture; test with

Read More »